Highlights of Soft Matter (DSOFT) Talks @ APS 2020 March Meeting
American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2020, the meeting was canceled due to concerns over the rapid spread of COVID-19.
To help the community quickly catch up on the work to be presented in this meeting, Paper Digest Team processed all talk abstracts, and generated one highlight sentence (typically the main topic) for each. Readers are encouraged to read these machine generated highlights / summaries to quickly get the main idea of each talk. This article is on the talks related to Soft Matter (DSOFT).
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TABLE : Soft Matter (DSOFT)
| Title | Authors | Highlight | Session | |
|---|---|---|---|---|
| 1 | Re-Printable, Self-Healing Polymer Networks | Sukhishvili, Svetlana; Gardea, Frank; Zhou, Qing | We report a versatile approach to designing 3D printable, re-processable dynamic covalent networks with controllable mechanical properties. | Session 1: 3D Printing of Polymers and Soft Materials |
| 2 | Reactive Processing in Extrusion based Polymeric 3D Printing with Surface Segregating Additives | Levenhagen, Neiko; Dadmun, Mark | Reactive Processing in Extrusion based Polymeric 3D Printing with Surface Segregating Additives | Session 1: 3D Printing of Polymers and Soft Materials |
| 3 | 3D Printing Polylactic Acid: modelling residual alignment, annealing and templated crystallinity | McIlroy, Claire; Graham, Richard; Cavallo, Dario; Seppala, Jon; Kotula, Anthony | We propose that this micro-structure leads to reduced weld strength. | Session 1: 3D Printing of Polymers and Soft Materials |
| 4 | Determination of polymer chain orientation in 3D printed filaments using Polarized Raman spectroscopy and Birefringence | Hassan, Nora; Seppala, Jonathan; Kotula, Anthony; Hight Walker, Angela; Migler, Kalman | To study orientation and alignment of molecular chains in 3D printed polycarbonate filaments, we used a combination of polarized Raman spectroscopy and birefringence measurements. | Session 1: 3D Printing of Polymers and Soft Materials |
| 5 | Mechanical Properties of an Additively Manufactured Cyanate Ester | Giovino, Marissa; Koerner, Hilmar; Baur, Jeffery | Mechanical Properties of an Additively Manufactured Cyanate Ester | Session 1: 3D Printing of Polymers and Soft Materials |
| 6 | Effect of Chain Alignment and Entanglements on Thermal Welding in Fused Filament Fabrication | Galvani, Marco; Robbins, Mark | To address this puzzle we performed molecular dynamics simulations of welding between polymer melts with different degrees of initial alignment. | Session 1: 3D Printing of Polymers and Soft Materials |
| 7 | 3D Printing of Polymers and Soft Materials | Seppala, Jon | This talk will cover “traditional” and emerging soft 3DP processes, material physics, measurement and modeling challenges, and opportunities. | Session 1: 3D Printing of Polymers and Soft Materials |
| 8 | Using Eigenvector Centrality to Predict the Mechanical Properties of Structured Materials | Welch, Cynthia; Welch, Paul; Patterson, Brian; Herman, Matthew; Kuettner, Lindsey | Our ultimate objectives are to provide a simple reduced-order model for predicting mechanical parameters for tailored structures and to better inform engineering models. | Session 1: 3D Printing of Polymers and Soft Materials |
| 9 | Mechanical Enhancement of Polydopamine Nano-Coatings via Thermal Annealing | Malollari, Katerina; Delparastan, Peyman; Fink, Tanner; Zha, Helen; Messersmith, Phillip | Here, we demonstrate thermal annealing at a moderate temperature (130 C) as a facile route to enhance mechanical robustness of pDA coatings. | Session 1: 3D Printing of Polymers and Soft Materials |
| 10 | The Role of Ionization in Thermal Transport of Solid Polyelectrolytes | Luo, Tengfei; Wei, Xingfei | In this work, we use molecular dynamics simulations to study the thermal transport mechanism of solid polyelectrolytes, poly(acrylic acid) (PAA) and its ionized forms. | Session 1: 3D Printing of Polymers and Soft Materials |
| 11 | Printing direction dependent microstructures in direct ink writing | Friedrich, Leanne; Begley, Matthew | We propose an analytical model for diagnosing sources of printing direction-dependent flows and particle distributions. | Session 1: 3D Printing of Polymers and Soft Materials |
| 12 | Polymer Network Formation in Epoxy-Acrylate Dual-Cure Thermoset Resins for Direct Ink Write Additive Manufacturing | Appelhans, Leah; Kopatz, Jessica; Unangst, Jaclynn; Cook, Adam; Reinholtz, Derek | Development of methods to additively manufacture thermoset resins will enable additive approaches for a broad scope of materials including structural materials and advanced composites. | Session 1: 3D Printing of Polymers and Soft Materials |
| 13 | Understanding the structure-property relationships of nanostructured epoxy inks for direct ink writing | Liu, Deborah; Donely, Gavin; Rogers, Simon; Krogstad, Daniel | In this presentation, we will discuss how these nanostructures affects the rheology and the printability of the inks as well as the epoxy crosslinking kinetics. | Session 1: 3D Printing of Polymers and Soft Materials |
| 14 | Chemical Approaches to Diversifying the 3D Printing Ecosystem | Boydston, Andrew | As a representative example, we will discuss progress toward simultaneous photo-radical/photo-cationic printing mechanisms for production of multimaterial parts. | Session 1: 3D Printing of Polymers and Soft Materials |
| 15 | 3D Control of Properties in Single-Material Digital Stereolithography for the Treatment of Growth Plate Injury | Uzcategui, Asais Camila; Higgins, Callie; Hergert, John; Muralidharan, Archish; Kilgore, Jason; Bryant, Stephanie; McLeod, Robert | In this work we use a poly(ethylene glycol) diacrylate based hydrogel to implement a step function and a gradual change in mechanical properties in 3D scaffolds. | Session 1: 3D Printing of Polymers and Soft Materials |
| 16 | Cure Depth Effects on Photopolymer Reactivity in Stereolithography 3D Printing | Smallwood, Anna; Adley, Rykelle; Jacott, Caius; Ryu, Chang | This study seeks to investigate the effect of photoinitiator concentration on these characteristics. | Session 1: 3D Printing of Polymers and Soft Materials |
| 17 | Design and Fabrication of 3D Printed Polymer Composites using Grayscale Stereolithography | Hergert, John; Uzcategui, Asais; Muralidharan, Archish; McLeod, Robert | A deterministic model for polymer conversion in the printing process is utilized to inform printing conditions such that final composite properties can be predicted. | Session 1: 3D Printing of Polymers and Soft Materials |
| 18 | Theory and Implementation of Volumetric 3D Printing | Rackson, Charles; Shusteff, Maxim; McLeod, Robert | We describe theoretical limitations to the method, experimental implementation, and how the coupling of optics and materials informs system design. | Session 1: 3D Printing of Polymers and Soft Materials |
| 19 | Stiffness can mediate the balance between hydrodynamic forces and avidity to impact the targeting of flexible polymeric nanoparticles in flow | Farokhirad, Samaneh; Ranganathan, Abhay; Myerson, Jacob; Muzykantov, Vladimir R.; Ayyaswamy, Portonovo; Eckmann, David M.; Radhakrishnan, Ravi | We employ a coarse-grained model for the polymeric NP and perform Brownian dynamics simulations with hydrodynamic interactions and in presence of wall-confinement, particulate margination, and wall-adhesion for obtaining NP microstructure, shape, and anisotropic and inhomogeneous transport properties for different NP stiffness. | Session 1: 3D Printing of Polymers and Soft Materials |
| 20 | Active Microrheology, Hall Effect, and Jamming in Active Chiral Fluids | Reichhardt, Cynthia; Reichhardt, Charles | We examine the motion of a probe particle driven through an active chiral fluid composed of circularly swimming disks. | Session 2: Active Colloids |
| 21 | Hydrodynamic Spin Lattices | Saenz, Pedro; Pucci, Giuseppe; Turton, Sam; Rosales, Ruben; Dunkel, Jorn; Bush, John | In this talk, we introduce hydrodynamic spin lattices (HSLs) of walking droplets as a new class of highly tunable active spin analog systems. | Session 2: Active Colloids |
| 22 | Emergence of multi-vortex states in swarms of active magnetic rollers | Han, Koohee; Kokot, Gašper; Glatz, Andreas; Snezhko, Alexey | We report that flocking magnetic rollers driven by a vertical a.c. magnetic field [1,2] can form long-lived multi-vortex states in an unconfined environment. | Session 2: Active Colloids |
| 23 | Controlled Self-Assembly of Vortex in Ensembles of Active Magnetic Rollers | Sokolov, Andrey; Kokot, Gašper; Snezhko, Alexey | Here we present a method for guided self-assembly of ferromagnetic rolling particles energized by a uniform AC magnetic field into a stationary vortex via magnetic interaction with an additional strongly localized magnetic field. | Session 2: Active Colloids |
| 24 | Self-phoretic helical colloids | Uspal, William; Poehnl, Ruben | Via numerical calculations and slender body theory, we study how the translational and rotational velocities of the particle depend on geometry and the distribution of catalytic activity over the particle surface. | Session 2: Active Colloids |
| 25 | 3D printed active starships and other nonuniaxial swimmers | Ouhajji, Samia; Kraft, Daniela | 3D printed active starships and other nonuniaxial swimmers | Session 2: Active Colloids |
| 26 | Light Programmable Locomotions of Semiconductor Nanomotors with Optically Tunable In-Phase Electric Polarization | Liang, Zexi; Teal, Daniel; Fan, Donglei (Emma) | Herein, we present our finding of a versatile working mechanism that allows instantaneous change of alignment direction and speed of semiconductor nanowires in an external electric field with simple visible-light exposure. | Session 2: Active Colloids |
| 27 | Bulk Viscosity of Dilute Gases using Nonequilibrium Molecular Dynamics Simulations | Sharma, Bhanuday; Kumar, Rakesh | In the present work, a new method is proposed for the estimation of the bulk viscosity of dilute gases using nonequilibrium molecular dynamics simulations. | Session 2: Active Colloids |
| 28 | Floor- or ceiling-sliding for chemically active, gyrotactic, sedimenting Janus particles | Das, Sayan; Jalilvand, Zohreh; Popescu, Mihail; Uspal, William; Dietrich, Siegfried; Kretzschmar, Ilona | Here we study this issue theoretically for model gyrotactic, self-phoretic Janus spheres near horizontal planar walls which are either below ("floor") or above ("ceiling") the particle. | Session 2: Active Colloids |
| 29 | Effects of Colloid Interactions on Active–Passive Collective Behavior | Madden, Ian; Wang, LinLin; Simmchen, Juliane; Luijten, Erik | Whereas current models can capture some aspects of a system’s collective behavior, oversimplification can lead to incorrectly attributing a particular behavior to a specific interaction (The European Physical Journal E 41, 145–169 (2018)). | Session 2: Active Colloids |
| 30 | New mechanism of motility-induced phase separation in active colloids | Alert, Ricard; Zhang, Jie; Yan, Jing; Wingreen, Ned; Granick, Steve | In this talk, I will demonstrate a new mechanism of MIPS, which instead of relying on a slowdown of particle motion with density, is based on interaction torques that reorient particles toward high-density regions. | Session 2: Active Colloids |
| 31 | Extract Non-Thermal Fluctuations from an Experimentally Measured Histogram of a Confined Active Brownian Particle | Shen, Chong; Li, Lanfang; Jiang, Zhiyu; Gilchrist, James; Ou-Yang, H Daniel | This presentation reports an experimental study using a model ABP in a quadratic potential well to test the hypothesis and its limitations. | Session 2: Active Colloids |
| 32 | Transport phenomena and Green-Kubo relations in active media: Theory | Epstein, Jeffrey; Mandadapu, Kranthi | We derive Green-Kubo relations for the several viscosity terms that appear in a constitutive theory of viscous active fluids with and without an internal spin degree of freedom, starting from an Onsager regression hypothesis on the non-equilibrium steady state. | Session 2: Active Colloids |
| 33 | Transport phenomena and Green-Kubo relations in active media: Simulation | Hargus, Cory; Klymko, Katherine; Epstein, Jeffrey; Mandadapu, Kranthi | We demonstrate agreement between viscosity coefficients obtained from Green-Kubo relations and non-equilibrium molecular dynamics simulations with imposed shear. | Session 2: Active Colloids |
| 34 | Nonlinear dynamics of chemically active microdrops grants an insight into interfacial chemistry | Morozov, Matvey; Rongy, Laurence; Brau, Fabian | Active emulsions are complex physicochemical systems that may provide a model for biological phenomena such as RNA polymerase clusters. | Session 2: Active Colloids |
| 35 | Revisiting the equation of state of active Brownian particles | Mallory, Stewart; Omar, Ahmad; Brady, John | Using a combination of large-scale simulation and analytical theory, we reveal previously unknown features of this equation of state. | Session 2: Active Colloids |
| 36 | Three-body problem for Brownian particles at different temperatures | Wang, Michael; Grosberg, Alexander | This model was previously studied analytically up to the second virial coefficients using pair distributions in the dilute limit. | Session 2: Active Colloids |
| 37 | Microscopic Origins of the Swim Pressure and the Anomalous Surface Tension of Active Matter | Omar, Ahmad; Wang, Zhen-Gang; Brady, John | We clarify the utility of the swim pressure as an “equivalent pressure" (analogous to those defined from electrostatic and gravitational body forces) and the conditions in which this concept can be appropriately applied. | Session 2: Active Colloids |
| 38 | Propagating Activity Fronts in Columns fo Fire Ants | Anderson, Caleb; Fernandez-Nieves, Alberto; Goldsztein, Guillermo | Here we present our surprise observation and measurements of stable activity fronts propagating through two-dimensional columns of thousands of fire ants. | Session 3: Active Matter |
| 39 | Self- and air-driven fluidization of black soldier fly larvae | Shishkov, Olga; Hu, David; Goldman, Daniel | Here we study a living system in which both internal and external activity can be varied. | Session 3: Active Matter |
| 40 | Stochastic thermodynamics for self-propelled particles | Szamel, Grzegorz | We present a generalization of stochastic thermodynamics to systems of active particles, which move under the combined influence of stochastic internal self-propulsions (activity) and a heat bath. | Session 3: Active Matter |
| 41 | Odd viscosity in active materials: microscopic origin and 3D effects | Markovich, Tomer; Lubensky, Tom | In this talk I will present a novel microscopic Hamiltonian theory for odd viscosity, valid also in 3D. | Session 3: Active Matter |
| 42 | Quincke Oscillation of Colloids at Planar Electrodes | Zhang, Zhengyan; Dou, Yong; Bishop, Kyle | So-called Quincke rotation near a planar substrate leads to particle translation and provides a useful experimental model for studying the collective dynamics of active colloids. | Session 3: Active Matter |
| 43 | Capturing the local entropy production of an active Brownian particles system by compression | Guo, Buming; Martiniani, Stefano; Chaikin, Paul; Levine, Dov | Here we use a compression based Ziv-Merhav method and other techniques to estimate KLD and time reversal symmetry to define a natural spatial decomposition of entropy production by applying the algorithms on discrete time series of state evolution in local block regions. | Session 3: Active Matter |
| 44 | Superdiffusion and hydrodynamic phase separation in a uniaxial active suspension | Dadhichi, Lokrshi; Kumar, K Vijay; Bhattacharjee, J K; Ramaswamy, Sriram | We examine, analytically and to some extent numerically, the dynamics of the concentration field in an active suspension with permanent uniaxial anisotropy. | Session 3: Active Matter |
| 45 | Chemistry-Induced Mobility in Catalytic Chemical Reactions | Wang, Huan; Park, Myeonggon; Tlusty, Tsvi; Granick, Steve | In simple exothermic, catalysed chemical reactions, we observe unexpected solvent enhanced diffusion, both in water and in organic solvents, to be tightly correlated with molecular catalytic cycles. | Session 3: Active Matter |
| 46 | Spontaneous locomotion of nano-catalysed BZ droplets | Kumar, D; JASUJA, KABEER; Dayal, Pratyush | In particular, we observe highest droplet velocities when RuNP decorated graphene sheets are used to catalyze the BZ reaction. | Session 3: Active Matter |
| 47 | Topological Mixing in the Vicsek Model of Active Matter | Nguyen, Nguyen; Smith, Spencer | We revisit this result from the perspective of mixing and fluid advection. | Session 3: Active Matter |
| 48 | Anomalous topological active matter | Sone, Kazuki; Ashida, Yuto | Here, we show that the topological edge modes can ubiquitously emerge in active matter, the collection of self-propelled particles, under influences of spatially periodic structures [1]. | Session 3: Active Matter |
| 49 | Homotopy analysis method for Non-Markovian processes in active matter | Apaza Pilco, Leonardo; Sandoval-Espinoza, Mario | We solve the Fokker-Planck (FP) equation for active non-Markovian and quasi-Markovian processes using the homotopy analysis method, and provide analytical expressions for classic mean values as a series in time. | Session 3: Active Matter |
| 50 | Computational study of autonomous mechanical oscillations in a colloidal network crosslinked via clock proteins | Melcher, Lauren; Rennert, Elisabeth; Ross, Jennifer; Rust, Michael; Robertson-Anderson, Rae; Das, Moumita | We investigate a colloidal network as a model system that can dynamically switch between crosslinked and unlinked states when connected via crosslinkers made of clock proteins such as the bacterial circadian oscillator proteins KaiABC. | Session 3: Active Matter |
| 51 | Scalar activity induced phase separation and liquid–solid transition in a Lennard-Jones system | Dasgupta, Chandan; Chari, S Siva Nasarayya; Maiti, Prabal | We observe that the two species tend to phase separate at sufficiently high temperature ratio. | Session 3: Active Matter |
| 52 | Dipolar Extensile Dynamics in Microtubule-Based 2D Active Nematics | Lemma, Linnea; Dogic, Zvonimir | Theories describe 2D active nematics in terms of liquid crystals, hydrodynamics and chaotic fluids. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 53 | Design of active nematic systems with controllable defect dynamics and flows | Zhang, Rui; Mozaffari, Ali; De Pablo, Juan | In this talk, I will summarize our recent progress in active nematics research, with an emphasis on the interplay between molecular interactions, elasticity, and hydrodynamic forces. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 54 | Control of bacterial dynamics by splay and bend in nematic vortices | Koizumi, Runa; Turiv, Taras; Genkin, Mikhail; Lastowski, Robert; Yu, Hao; Chaganava, Irakli; Wei, Qihuo; Aronson, Igor; Lavrentovich, Oleg | We explore the effect of splay and bend of the director field on the individual and collective behavior of motile Bacilli subtilis. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 55 | Spatiotemporal Optimal Control of an Extensile Active Nematic Suspension | Norton, Michael; Grover, Piyush; Baskaran, Aparna; Hagan, Michael; Fraden, Seth | Towards developing experimental methods for controlling these dynamics, we consider an optimal control problem which seeks to find the spatiotemporal pattern of active stress strength required to drive the system towards a desired director field configuration. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 56 | Self propelling nematic microcapsules | Maass, Corinna; Hokmabad, Babak Vajdi; Baldwin, Kyle; Bahr, Christian | Building on an established active emulsion platform, we have developed a new approach to the problem of encapsulation by using nematic active double emulsions, where a solubilization mechanism induces activity and the molecular nematicity provides stability. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 57 | The Dynamics of Active Nematic Defects on The Sphere Surface | Zhang, Yiheng; Deserno, Markus; Tu, Zhanchun | Here we study the active counterpart of such a system, in which a self-driven directional motion of the individual nematogens creates a large-scale flow that drives the system out of equilibrium. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 58 | Emergent dynamics of large scale collective rotations in 2D active nematic | Quint, David; Chapman, Dali; Gross, Steven; Beller, Daniel; Gopinathan, Ajay; Xu, Jing | Motivated by recent work on active nematics we employ here a microtubule and kinesin motor gliding assay system to examine dynamic collective order in 2D. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 59 | Defect dynamics of 3D active nematic turbulence | Kos, Ziga; Binysh, Jack; Copar, Simon; Aplinc, Jure; Zumer, Slobodan; Alexander, Gareth; Ravnik, Miha | Our work aims to provide insight into 3D active turbulence from the perspective of the topology of the emergent 3D defects and their self-induced dynamics. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 60 | Topological Defects in Cell Monolayers Guided by Topography | Endresen, Kirsten; Kim, MinSu; Serra, Francesca | We survey multiple cell types (EpH-4 and 3T6) to characterize their alignment, density, and dynamics near defects of various topological charges, and define LC parameters such as defect core sizes and elastic constants. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 61 | Clustering, jamming, and topological defects in growing bacterial colonies at liquid interfaces | Langeslay, Blake; Juarez, Gabriel | Here, we present experimental results on growing colonies of rod-shaped bacteria confined in two dimensions by adsorption at an oil-water interface. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 62 | Topological defects drive layer formation in bacteria colonies | Copenhagen, Katherine; Alert, Ricard; Wingreen, Ned; Shaevitz, Joshua | By measuring cell flows, we find an influx of cells towards positive defects and an outflux away from negative defects. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 63 | Pulsating air bubbles can swim in anisotropic fluids | Kim, Sung-Jo; Um, Eujin; Jeong, Joonwoo | Here we explore the swimming of a spherical bubble with a periodic change in its radius. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 64 | Defect Ordering and Patterning in Active Nematics | Shankar, Suraj; Marchetti, M Cristina | By focusing on defects as the relevant excitations, we develop a hydrodynamic theory of active defects incorporating both defect motility and active torques that align defect orientations. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 65 | Ordering and Correlations of Active Nematic Defects in 2D Flat Space | Nambisan, Jyothishraj; Pearce, Daniel; Ellis, Perry; Giomi, Luca; Fernandez-Nieves, Alberto | One of the aims of our work is to address the orientation of defects in curved geometries. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 66 | Defect order in active nematics | Chen, Zhitao; Bowick, Mark; Marchetti, M Cristina | In this talk, we will discuss the interplay between elastic and active torques, active flows and frictional dissipation in controlling defect patterns in these active liquid crystals. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 67 | Dynamical Behavior of Defects in Circularly Patterned Active Nematics | Mozaffari, Ali; Zhang, Rui; Sokolov, Andrey; Snezhko, Alexey; De Pablo, Juan | We show that by patterning the activity by imposing active stresses in circular domains near the center of confinement, it is possible to regulate the motion of defects. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 68 | Photo-Patterning DNA Structures with Topological Defects and Arbitrary Patterns through Multiple Length Scales | Peng, Chenhui; Jiang, Jinghua; Dhakal, Netra | In this work, we demonstrate that the orientational order of DNA molecules can be precisely controlled by using photo-patterning technique. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 69 | Cells as liquid crystals, and what happens when they can’t align | Endresen, Kirsten; Kim, MinSu; Serra, Francesca | Our goal is to connect biological properties of cells to the LC properties of the monolayers that the cells can form. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 70 | Quantifying orientational interactions among defects in active nematics | Pokawanvit, Supavit; You, Zhihong; Marchetti, M Cristina; Bowick, Mark | Specifically, we demonstrate that the polar +1/2 defects interact via torques that tend to align the defect polarization with the elastic force they experience from other defects, as in previously studied models of flocking. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 71 | Effect of active enzyme diffusion on mesoscale particles | Rouhvand, Bahar; Ross, Jennifer | Prior work has used bacteria or colloidal active matter to serve as active baths that can turn rotors or be rectified. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 72 | Collective trapping of flocking particles by asymmetric obstacles | Aragones, Juan; Martinez, Raul; Alarcon, Francisco; Valeriani, Chantal | In this talk, I will show that flocking particles which follow the Vicsek model aligning rules experience a collective trapping in the presence of a wall of funnels made of chevrons, concentrating at the opposite side of a wall of funnels than run-and-tumbling particles. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 73 | Polar flocking of active clusters | Dommersnes, Paul; Fossum, Jon Otto | Here we report on a system of electro-propelled rolling granular beads with tuneable interactions. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 74 | Flocking and clustering of self-propelled disks with active reorientation | Zheng, Ting; Chen, Lu; Tu, Zhanchun; Cheng, Xiang; Xu, Xinliang | In this talk we present a numerical investigation of self-propelled disks that integrates a behavior of active reorientation in analogy to collision avoidance in animal herds. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 75 | Active folding and coiling in vivo | Mitchell, Noah; Cislo, Dillon; Shankar, Suraj; Dogic, Zvonimir; Shraiman, Boris; Streichan, Sebastian | We present a quantitative account of the dynamics of folding and coiling of the midgut that links cellular motion and deformation to the macroscopic shape change of the organ. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 76 | Dynamical self-consistent field-theory for active nematic liquid crystals: Nematic order and spatio-temporal structure in surface colonies of rod-like bacteria | Lee, Drake; Wickham, Robert | We present a dynamical self-consistent field theory for interacting, self-propelled rods that we use to study fascinating time-dependent, inhomogeneous structures observed in surface colonies of twitching Pseudomonas aeruginosa bacteria. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 77 | Growth and dynamics of active nematic droplets of Myxococcus xanthus bacteria | Yang, Cassidy; Shaevitz, Joshua | Unlike passive fluids that form axisymmetric spherical cap-shaped droplets, we find that these aggregates break symmetry and are often elongated in shape with non-uniform contact angles. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 78 | Solid-liquid transitions of deformable active particles | Loewe, Benjamin; Chiang, Michael; Marenduzzo, Davide; Marchetti, M Cristina | To describe such situations, we have developed a multi-phase field model where cells are characterized by multiple scalar fields, and interact through steric repulsion. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 79 | Uncovering the dynamic precursors to motor-driven contraction of active gels | Alvarado, José | Here we investigate the microscopic dynamics of reconstituted actin–myosin networks using real-space video microscopy and Fourier-space dynamic light scattering. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 80 | Microscopic simulations of a 3D active nematic composed of semiflexible polymers | Peterson, Matthew; Hagan, Michael; Baskaran, Aparna | Here, we will use particle-based simulations to better understand the dynamical properties of dry active nematics in 3D, both in bulk and under confinement. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 81 | The structure and dynamics of microtubule bundles mediated by motor proteins | Lemma, Bezia; Lemma, Linnea; Fuerthauer, Sebastian; Shelley, Michael; Dogic, Zvonimir; Needleman, Daniel | We can measure the geometric structure of these MT-based bundles using small-angle x-ray scattering and determine the polar structure of these materials by taking advantage of their chiral crystal lattice which produces constructive interference of second harmonic signal between polar-aligned MTs. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 82 | Microscopic to mesoscopic: what can modular molecular motors teach us about the nature of active stress? | Redford, Steven; Ruijgrok, Paul; Colen, Jonathan; Zemsky, Sasha; Vitelli, Vincenzo; Bryant, Zev; Dinner, Aaron; Gardel, Margaret | Coarse-grained hydrodynamic theories have proven invaluable to our understanding of active nematic liquid crystals. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 83 | 2D Patterns of Active Stress ascribe 3D Deformations of Driven Actomyosin Networks | Yadav, Vikrant; Kim, Taeyoon; De La Cruz, Enrique; Murrell, Michael | To understand this relation, we design an invitro actomyosin network with tunable mechanical stiffness and activity. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 84 | Confinement effects on the phase behavior of collagen-like semiflexible polymers | Spencer, Russell; Ha, Bae-Yeun | In this talk, we discuss the phase behavior of collagen-like semi-flexible polymers in the presence or absence of confinement, focusing on isotropic, nematic and cholesteric phases. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 85 | Shape study of Spindle-like microtubule tactoids using experiment and computation | Sahu, Sumon; Herbst, Lena; Quinn, Ryan; Ross, Jennifer | We explored the phase space of this organization by varying initial conditions like filament number, orientation, and length as well as crosslinker number, binding dynamics. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 86 | Shear-induced gelation of self-yielding active networks | Gagnon, David; Dessi, Claudia; Dogic, Zvonimir; Blair, Daniel | In this talk, I will describe how microscopic dynamics modify the macroscopic mechanical properties of extensile microtubule networks. | Session 4: Active Matter and Liquid Crystals in Biological Systems |
| 87 | Clogging and Depinning of Active Matter Systems in Disordered Media | Reichhardt, Cynthia | We numerically examine the transport of active run-and-tumble particles with steric particle-particle interactions driven with a drift force over random disordered landscapes comprised of fixed obstacles. | Session 5: Active Matter in Complex Environments |
| 88 | Flocking through disorder | Chardac, Amélie; Shankar, Suraj; Marchetti, M Cristina; Bartolo, Denis | I will present a series of quantitative experiments that elucidate the existence of a novel state of active matter that supports orientational order (through a sparse rivers network) but no net transport. | Session 5: Active Matter in Complex Environments |
| 89 | Enhanced bacterial motility in colloidal media | Kamdar, Shashank; Francis, Lorraine; Cheng, Xiang | Using confocal microscopy, we image the motion of fluorescent-labeled bacteria and implement an in-house tracking algorithm to obtain the speeds of bacteria. | Session 5: Active Matter in Complex Environments |
| 90 | Theoretical Framework to Describe Traveling Waves of Bacteria in Porous Media | Amchin, Daniel; Bhattacharjee, Tapomoy; Kratz, Felix; Ott, Jenna; Datta, Sujit | To address this gap in knowledge, we use confocal microscopy to directly track bacteria deep inside transparent porous media. | Session 5: Active Matter in Complex Environments |
| 91 | The role of diversity for collective bacterial migration through diverse environments | Mattingly, Henry; Emonet, Thierry | We recently showed that diverse cells can travel together in the expanding front by sorting themselves by chemotactic ability, which compensates for their differences by matching ability to the local chemotactic signal (Fu, Kato et al. | Session 5: Active Matter in Complex Environments |
| 92 | Light-Sensing Microbes in Complex Geometries: Surface Adhesion, Gliding Motility and Self-Organization | Fragkopoulos, Alexandros; Till, Sebastian; Raum, Sebastian; Catalan, Rodrigo; Baeumchen, Oliver | Based on cell tracking and statistical analysis, we study the surface adsorption and gliding motility of light-sensing microbes and demonstrate how surface gliding, in conjunction with cell-cell interactions, may control the emergence of microbial self-organization in confinement. | Session 5: Active Matter in Complex Environments |
| 93 | Active Brownian filaments: deviations from blob scaling theory and dynamics inside cavities | Das, Shibananda; Cacciuto, Angelo | Via a numerical study we establish how the standard blob scaling theory representations of a polymer breaks down when dealing with active polymers under confinement. | Session 5: Active Matter in Complex Environments |
| 94 | Fitness of cell colonies to navigate obstacles | Li, Bo; Yu, Sun-Min; Cho, Yoon-Kyoung; Granick, Steve | Stretched leader cells trigger acceleration of the whole group; the resulting velocity difference, in turn, reinforces stretching of the leaders and establishes positive feedback between cell morphology and mechanical strength, as we confirm by direct visualization of F-actin expression, cadherin localization, and the shapes of cells and their nuclei. | Session 5: Active Matter in Complex Environments |
| 95 | Anomalous size-dependence of bacterial diffusion in a micropillar array | Chopra, Pooja; Quint, David; Gopinathan, Ajay; Liu, Bin | We develop an agent-based model that purely relies on the geometry of the micropillars, bacteria and residency time. | Session 5: Active Matter in Complex Environments |
| 96 | Colloidal random-walkers for probing anomalous diffusion in heterogeneous micro-environments | Karani, Hamid Reza; Kokot, Gašper; Vlahovska, Petia | Building on our recently developed tunable colloidal random walker, we combine microfluidics experiments with theory to characterize and quantify the degree of anomalous diffusion. | Session 5: Active Matter in Complex Environments |
| 97 | Transport properties of circle microswimmers in heterogeneous media | Chepizhko, Oleksandr; Franosch, Thomas | Here, we investigate a model for a single circle swimmer exploring a two-dimensional disordered array of impenetrable obstacles. | Session 5: Active Matter in Complex Environments |
| 98 | Escape of a Nanoparticle from Cavities in a Porous Matrix | Wu, Haichao; Greydanus, Benjamin; Schwartz, Daniel | Here, we used a three-dimensional (3D) tracking method to explicitly visualize the process of passive Brownian nanoparticle and self-propelled Janus particle diffusion within periodic porous nanostructures. | Session 5: Active Matter in Complex Environments |
| 99 | The Physics of Cold Active Matter: on how time-independent disorder affects the motion of self-propelled particles | Peruani, Fernando | Despite this, most experimental and theoretical efforts have focused on homogeneous media and the impact of environmental heterogeneities on individual and collective properties of active systems has remained, up to recently, unexplored. | Session 5: Active Matter in Complex Environments |
| 100 | The motion of active colloids and their induced flow field at fluid interfaces | Molaei, Mehdi; Chisholm, Nicholas; Deng, Jiayi; Yao, Tianyi; Crocker, John; Stebe, Kathleen | We consider an ideal flat "clean" interface characterized solely by a uniform interfacial tension. | Session 5: Active Matter in Complex Environments |
| 101 | Hydrodynamic attraction of bacteria to gas and liquid interfaces | Ahmadzadegan, Adib; WANG, Shiyan; Vlachos, Pavlos; Ardekani, Arezoo | We develop a new theory based on Brownian dynamics including hydrodynamics and short-range physio-chemical interactions between bacteria and surfactant-laden interfaces and explain our experimental findings. | Session 5: Active Matter in Complex Environments |
| 102 | Non-Markovian active droplets | IZZET, Adrien; Zakine, Ruben; Vanden-Eijnden, Eric; Brujic, Jasna | Here we show that the trajectories of larger droplets display complex non-Markovian behaviors, such as self-interacting dynamics, that require a more complicated model than rotational diffusion. | Session 5: Active Matter in Complex Environments |
| 103 | Stigmergy in active furrowers | Imaran, MD; Prabhakar, Ranganathan; Chelakkot, Raghunath; Inamdar, Mandar | We attempt to explain our observations through a coarse-grained, but general, model of stigmergy. | Session 5: Active Matter in Complex Environments |
| 104 | Slip and distance effects on the self-propulsion of catalytic microswimmers close to a wall | Ketzetzi, Stefania; de Graaf, Joost; Doherty, Rachel; Kraft, Daniela | In this talk, we will present quantitative measurements of the effect of the substrate on the velocity of Pt-coated model microswimmers. | Session 5: Active Matter in Complex Environments |
| 105 | Measuring chaotic advection in a biological active nematic in viscous environments | Tan, Amanda; Mitchell, Kevin; Hirst, Linda | We investigate how the external changes from viscosity affect various quantitative parameters from chaotic advection theory, such as local fluid stretching rates within the network and topological entropy calculated from defect braiding. | Session 5: Active Matter in Complex Environments |
| 106 | Hydrodynamic interactions between passive colloids in an active bacterial bath | Gokhale, Shreyas; Li, Junang; Solon, Alexandre; Gore, Jeffrey; Fakhri, Nikta | By quantifying spatial velocity correlations and the short time pair diffusivity tensor for colloids, we show that bacterial motion leads to partial screening of long-ranged hydrodynamic interactions. | Session 5: Active Matter in Complex Environments |
| 107 | Self-organization of swimmers drives long-range fluid transport in bacterial colonies | Haoran, Xu; Dauparas, Justas; Das, Debasish; Lauga, Eric; Wu, Yilin | Here, we show that motile cells in sessile colonies of peritrichously flagellated bacteria can self-organize into two adjacent, centimeter-scale motile rings surrounding the entire colony. | Session 5: Active Matter in Complex Environments |
| 108 | Linear instability and nonlinear dynamics of droplets and layers of active fluid | Stein, David; Young, Yuan-nan; Shelley, Michael | In this work we focus on the effects of surface tension on the stability and nonlinear dynamics in droplets and layers of active fluid. | Session 5: Active Matter in Complex Environments |
| 109 | Swimming of active drops in confinements with external flows | Dey, Ranabir; Buness, Carola M.; Jin, Chenyu; Maass, Corinna | We feel that understanding such swimming behaviour of active matter will make significant contribution towards better comprehension of certain important biological phenomena. | Session 5: Active Matter in Complex Environments |
| 110 | Examining collective mechanical properties of fish schools using projected light fields | Puckett, James; Pokhrel, Aawaz | Models have shown that simple local interactions between individuals gives rise to the emergent self-organized macroscopic states such as flocks, swarms, or schools. | Session 5: Active Matter in Complex Environments |
| 111 | Spatial-temporal organization of bacterial suspensions under confinement | Aronson, Igor | We present experimental and theoretical studies on the expansion of highly concentrated bacterial droplets into an ambient bacteria-free fluid. | Session 5: Active Matter in Complex Environments |
| 112 | Trapping of microswimmers in vortex flows | Berman, Simon; Mitchell, Kevin | We propose heteroclinic bifurcations between swimming fixed points as a general mechanism for the creation of stable swimmer trajectories. | Session 5: Active Matter in Complex Environments |
| 113 | Sensorimotor processing and navigation in confined microswimmers | Bentley, Samuel; Anagnostidis, Vasileios; Gielen, Fabrice; Wan, Kirsty | We present a novel microfluidic platform which allowed us for the first time to monitor and analyse algal cell motility over hours, and even developmental timescales. | Session 5: Active Matter in Complex Environments |
| 114 | Topographical guidance of highly-motile cells using cell-sized features | Wondergem, Joeri; Schakenraad, Koen; Witzel, Patrick; Mytiliniou, Maria; Holcman, David; Heinrich, Doris | Here, we focused on a larger scale, and studied the influence of cell-sized obstacles on highly-motile, persistent cell migration. | Session 5: Active Matter in Complex Environments |
| 115 | Quenching active matter using light: Light mediated motility in swarming Serratia marcescens | Gopinath, Arvind; Yang, Junyi; Patteson, Alison; Arratia, Paulo | Complementing our experimental results, we propose and analyze a minimal Brownian dynamics model to study the escape of bacteria from the exposed region before they are completely immobilized and trapped. | Session 5: Active Matter in Complex Environments |
| 116 | Submerged micro-strucutures generate a soft boundary effect on active nematic flows | Khaladj, Dimitrius; Tan, Amanda; Hirst, Linda | We study the behavior of an active nematic microtubule system confined by submerged complex geometries. | Session 5: Active Matter in Complex Environments |
| 117 | Lattices by design: exploring long-ranged interactions with gradient sensing droplets | Molina, Anton; Prakash, Manu; Kumar, Shailabh | Here, we develop exotic lattice systems that exploit the tools of photolithography to fabricate arbitrary patterns of hydrophobic boundaries, enabling us to experimentally manipulate the geometry in which long-ranged degrees of freedom interact. | Session 5: Active Matter in Complex Environments |
| 118 | Arresting Active Spinning Particle Coarsening in Passive Media via Actuation Protocols | Steimel, Joshua; Tollefsen, Ryan; Alexander-Katz, Alfredo | We present a novel approach which allows the control of coarsening behavior and resultant characteristic domain size via modulation of the activity actuation protocol. | Session 5: Active Matter in Complex Environments |
| 119 | Flocking Transition in a Self-propelled Particle Model Using Experimental Motility Conditions | Lyles, Jelani; Yanka, Paul; Tung, Chih Kuan; Sussman, Daniel; Manning, M. Lisa | Flocking transition has been studied using self-propelled particle models for decades. | Session 5: Active Matter in Complex Environments |
| 120 | Re-entrant self pumping in confined active fluids | Varghese, Minu; Baskaran, Arvind; Hagan, Michael; Baskaran, Aparna | In this talk, I will discuss the origin of this phenomenon using an active hydrodynamic theory. | Session 5: Active Matter in Complex Environments |
| 121 | Tunable self-organization of swimming magnetic bacterial suspensions | Wijesinghe, Hiran; Pierce, Christopher; Mumper, Eric; Lower, Brian; Lower, Steven; Sooryakumar, Ratnasingham | We present population-level self-organization in a flagellated magnetic bacterial suspension of Magnetospirillum magneticum (AMB-1) that is amenable to experimental control using programmable fields. | Session 5: Active Matter in Complex Environments |
| 122 | Dynamics of 2D Active Nematics Confined in an Annulus | Joshi, Chaitanya; Zarei, Zahra; Norton, Michael; Fraden, Seth; Baskaran, Aparna; Hagan, Michael | In this talk, we will discuss a theoretical and computational study of 2D active nematics confined to an annulus. | Session 5: Active Matter in Complex Environments |
| 123 | Self-organization of bacterial active matter in space and time | Liu, Song; Wu, Yilin | Here we found that tuning the rheological properties of bacterial active fluids enables large-scale spatial and temporal self-organization. | Session 5: Active Matter in Complex Environments |
| 124 | Nonequilibrium phases in mixtures of active and passive particles | Li, Junang; Gokhale, Shreyas; Solon, Alexandre; Gore, Jeffrey; Fakhri, Nikta | Here, we map the computational phase diagram of a binary mixture of active and passive particles as a function of orientational interactions and Peclet number and observe new emergent behavior of dynamical clustering and a polar band of active particles. | Session 5: Active Matter in Complex Environments |
| 125 | Tuning the self-organization of confined active particles by the steepness of the trap | Rana, Shubhashis; Samsuzzaman, Md.; Saha, Arnab | We consider the collective dynamics of self-propelling particles in two dimensions. | Session 5: Active Matter in Complex Environments |
| 126 | Active matters: broken symmetries and response | Dal Cengio, Sara; Levis, Demian; Pagonabarraga, Ignacio | We address the question of how interacting active systems in a non-equilibrium steady-state respond to an external perturbation. | Session 5: Active Matter in Complex Environments |
| 127 | Spontaneous symmetry breaking induced unidirectional rotation of a chain-grafted colloidal particle in the active bath | TIAN, WENDE | Here we show, by simulations, that a chain-grafted disk-like colloidal particle can rotate unidirectionally and hence output work when immersed in a thin film of active particle suspension. | Session 5: Active Matter in Complex Environments |
| 128 | Temperature dependence of microtubule-based active fluid | Bate, Teagan; Jarvis, Edward; Varney, Megan; Wu, Kun-Ta | This temperature-dependent speed was reported to follow the Arrhenius Law. | Session 5: Active Matter in Complex Environments |
| 129 | Elasticity mediated attraction between active polar particles | Gupta, Rahul; Kant, Raushan; Soni, Harsh; Sood, Ajay; Ramaswamy, Sriram | We present a theory for this active attraction based on the forcing imposed by the motile rods on the crystalline medium of beads, and the action of the medium on the rod orientation. | Session 5: Active Matter in Complex Environments |
| 130 | Light-regulated swimming motility induces cell aggregation in confinement | Fragkopoulos, Alexandros; Vachier, Jérémy; Frey, Johannes; Le Menn, Flora-Maud; Wilczek, Michael; Mazza, Marco; Baeumchen, Oliver | We observe that a suspension of freely swimming C hlamydomonas reinhardtii cells, a unicellular soil-dwelling microalgae and a model organism of puller-type microswimmers, forms such large-scale aggregations under confinement in specific light conditions. | Session 5: Active Matter in Complex Environments |
| 131 | Undulatory intruder dynamics in water-saturated granular beds | Kudrolli, Arshad; Huynh, Trinh | We will report an investigation of active intruder dynamics through complex media with {\texit Lumbriculus variegatus} moving through water saturated granular beds which are refractive index matched to enable observation of their motion inside the bed. | Session 5: Active Matter in Complex Environments |
| 132 | Pressure of bacterial suspensions on confining walls and freely moving chains | Ma, Xiaolei; Guo, Shuo; Xu, Xinliang; Cheng, Xiang | In particular, mechanical pressure, a state variable in equilibrium systems, shows a nontrivial dependence on system boundary as well as specific measurement methods. | Session 5: Active Matter in Complex Environments |
| 133 | Active surfers on a vibrating bath: self-propulsion and interactions | Oza, Anand; Ho, Ian; Pucci, Giuseppe; Harris, Daniel | We present a combined experimental and theoretical investigation of a newly discovered active matter system consisting of objects floating on a vertically vibrating fluid bath. | Session 5: Active Matter in Complex Environments |
| 134 | Nutrient depletion thresholds in 3D printed cell assemblies | Morley, Cameron; Angelini, Thomas | In this talk, we will describe experiments that test the 200 micron rule in which we 3D print controlled distributions of hepatocytes into 3D culture medium made from jammed granular microgels. | Session 5: Active Matter in Complex Environments |
| 135 | Control of Active Nematics through Friction | Thijssen, Kristian; Metselaar, Luuk; Shendruk, Tyler; Doostmohammadi, Amin; Yeomans, Julia | Our work demonstrates novel methods to control active matter without the introduction of invasive solid bounding walls. | Session 5: Active Matter in Complex Environments |
| 136 | Inertial effects on trapped active matter | Sandoval-Espinoza, Mario; Gutierrez, Lorenzo | Here, we analytically find the effect of inertia on the mean-square displacement and mean-square speed of a system of inertial active Brownian particles subject to a weak and a strong harmonic trap. | Session 5: Active Matter in Complex Environments |
| 137 | Wiggling arthropods induce flow in granular materials | Kendall, Melia; Chen, Shih-Yuan; Daniels, Karen | Just as heating a viscous fluid causes its viscosity to drop, we observe that the introduction of active particles into a passive granular material can increase its flowability. | Session 5: Active Matter in Complex Environments |
| 138 | Compositional and structural gradients in dental enamel: from nano- to microscale | DeRocher, Karen; Smeets, Paul; Goodge, Berit; Zachmann, Michael; Balachandran, Prasanna; Stegbauer, Linus; Cohen, Michael; Gordon, Lyle; Rondinelli, James; Fitting Kourkoutis, Lena; Joester, Derk | Herein we show, using atomic-scale quantitative imaging and correlative spectroscopies, that human enamel is comprised of crystalline apatite and a Mg-rich amorphous intergranular phase. | Session 6: Bio-Mineralization, Hydration & Hardening in Colloidal Gels: Building Solid Materials Out of Soft Gels |
| 139 | Hydrogel Mineralization via Amorphous Precursors | Espinosa-Marzal, Rosa; Fu, Binxin; Lopez-Berganza, Josue; Lee, Ching-Wei; Rogers, Simon | Our aim is to mechanistically elucidate potential pathways that afford control of the mineralization pathway of hydrogels and of their microstructure, and yield composites with tunable mechanical response. | Session 6: Bio-Mineralization, Hydration & Hardening in Colloidal Gels: Building Solid Materials Out of Soft Gels |
| 140 | From Modeling Free Chains with the Rosenbluth Algorithm to Modeling Rigid, Compact, and Overlapped Chains with Our Developed Algorithm | Aldaais, Ebtisam; Crittenden, Scott | In 1955, Rosenbluth developed a chain-growth technique for Self-Avoiding Random Walk (SARW) with a set of weights that allows one to approximate all possible configurations of a real chain in a cubic or square lattice. | Session 7: Biopolymer Structures and Assemblies |
| 141 | Simulations of Grafted Methylcellulose Chains in Solution | Sethuraman, Vaidyanathan; Dorfman, Kevin | We utilize coarse-grained molecular dynamics simulations to understand the influence of grafting on methylcellulose chains. | Session 7: Biopolymer Structures and Assemblies |
| 142 | Random Copolymer Complexation with Proteins and Possible Applications | Wang, Jeremy; Qiao, Baofu; Nguyen, Trung; Torkelson, John; Olvera De La Cruz, Monica | This discovery allows us to develop novel and cost-effective techniques to enhance the properties of certain proteins, such as those with enzymatic functions, and increase their stability in demanding environments. | Session 7: Biopolymer Structures and Assemblies |
| 143 | Synthesis and Self-assembly of Saccharide-Polystyrene Hybrid Block Copolymers | Seo, Minji; Li, Sheng | In this contribution, a series of saccharide-containing diblocks and triblocks were prepared by combining maltotriose with polystyrene of different chain lengths. | Session 7: Biopolymer Structures and Assemblies |
| 144 | Polyvinyl alcohol composite hydrogels containing mixtures of cellulose nanocrystals and chitin nanofibers | Irvin, Cameron; Satam, Chinmay; Russo, Paul; Meredith, James; Shofner, Meisha | In this work, we have examined how cellulose nanocrystals (CNCs) and chitin nanofibers (ChNFs) may be used separately and as mixtures to affect the properties of poly(vinyl alcohol) (PVA) hydrogels. | Session 7: Biopolymer Structures and Assemblies |
| 145 | Hierarchically Organized Structure of Electrospun Nanofibers from Computationally Designed Peptide Bundlemers | Kim, Kyunghee; Kloxin, Christopher; Saven, Jeffery; Pochan, Darrin | Hierarchically Organized Structure of Electrospun Nanofibers from Computationally Designed Peptide Bundlemers | Session 7: Biopolymer Structures and Assemblies |
| 146 | Chitin Nanocrystals confined to polymer microgels. | Lee, Sujin; Reichmanis, Elsa; Park, Jung O; Srinivasarao, Mohan | We investigate chitin nanocrystals confined to pnipam microgels using microfluidics device. | Session 7: Biopolymer Structures and Assemblies |
| 147 | Enhanced mechanical properties of fatty acid-derived thermoplastic elastomers through incorporation of ionic interactions | Robertson, Megan; Ding, Wenyue; Hanson, Josiah | Enhanced mechanical properties of fatty acid-derived thermoplastic elastomers through incorporation of ionic interactions | Session 7: Biopolymer Structures and Assemblies |
| 148 | Characterizing Network Structure in Lignin-Based Hydrogel Composites for Aqueous Separations | Gregorich, Nicholas; Ding, Junhuan; Thies, Mark; Davis, Eric | Characterizing Network Structure in Lignin-Based Hydrogel Composites for Aqueous Separations | Session 7: Biopolymer Structures and Assemblies |
| 149 | Gelation and fibril formation of poly(N-isopropylacrylamide)-grafted methylcellulose | Coughlin, McKenzie; Edmund, Jerrick; Ertem, S. Piril; Morozova, Svetlana; Schmidt, Peter; Reineke, Theresa; Bates, Frank; Lodge, Timothy | Utilizing small-amplitude oscillatory shear, we characterized the change in modulus and gelation behavior. | Session 7: Biopolymer Structures and Assemblies |
| 150 | Anamolous Hyperpolarization observed in polyacrylate gels and their implications on polyelectrolyte theory | Kozawa, Susan; Walker, Anne; Scott-McKean, Jonah; Garr, Jeanette; Flask, Chris; Hore, Michael; Costa, Alberto; Wnek, Gary | We have unexpectedly found that bathing poly(acrylate) gels in aqueous solutions of monovalent salts such as KH 2PO 4 in a narrow concentration range (ca. 8-16 mM) leads to a softening of gels without measurable volume changes. | Session 7: Biopolymer Structures and Assemblies |
| 151 | Strain-Field Analysis of Subsonic and Supersonic Cracks in Filled Elastomers | Mai, Thanh-Tam; Urayama, Kenji | In the present study, the transition in the characteristics of local crack-tip strain-field from the subsonic ( V/ C s < 1) to supersonic ( V/ C s > 1) cracks in filled elastomers is investigated, where V and C s are crack-growth velocity and shear wave speed, respectively. | Session 7: Biopolymer Structures and Assemblies |
| 152 | Asymmetric Lipid/Polymer Vesicles | Huang, Yuting | Here, we use microfluidics to fabricate mono disperse and highly controllable asymmetric vesicles, which unlike the conventional methods that often end up wit h highly poly disperse samples. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 153 | Polyelectrolyte dynamical self-consistent field theory | Luyben, Sylvia; Wickham, Robert | Our approach reduces the interacting many-chain problem to a single polyelectrolyte chain in a dynamical mean force field. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 154 | Dynamics of self-interacting bio-inspired polymers in shear flows | Amaya-Espinosa, Helman; Alexander-Katz, Alfredo; Aponte-Santamaría, Camilo | We tackled this question by implementing Brownian dynamics simulations at a coarse-grained resolution of VWF-like self-interacting biopolymers. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 155 | Computational prediction of molecular shape through the assembly of sequence-controlled polymers | Tulsi, Davindra; Simmons, David | Here we employ molecular dynamics simulations to probe the relationship between sequence and molecular shape in model synthetic polymers. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 156 | Bottom-up Coarse-grained Molecular Simulations of Peptoids with Enhanced Sampling | Zhao, Mingfei; Sampath, Janani; Mundy, Christopher; Pfaendtner, Jim; Ferguson, Andrew | To reach the time and length scale of peptoid assembly, we develop a coarse-grained (CG) model reparametrized from all-atom (AA) simulations by fitting CG bonded interactions through iterative Boltzmann inversion and nonbonded interactions through potential of mean force matching. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 157 | Solution Self-Assembly of Block Copolypeptoids with a Crystallizable Core-Forming Block | Jiang, Naisheng; Yu, Tianyi; Qian, Shuo; Tsengam, Igor Kevin Mkam; John, Vijay; Zhang, Donghui | In this study, we investigate the solution self-assembly of coil-crystalline diblock copolypeptoids with one polypeptoid block having long n-alkyl side chains. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 158 | Transforming protein-polymer conjugate purification by tuning protein solubility | Russell, Alan; Baker, Stefanie; colina, coray | Transforming protein-polymer conjugate purification by tuning protein solubility | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 159 | Characterization of Fiber Formation of Sugar-based Poly(D-glucose carbonate) Amphiphilic Block Copolymers in Solution | Lee, Jee Young; Song, Yue; Wooley, Karen; Pochan, Darrin | The kinetics of the fiber formation is characterized using cryogenic-TEM and SANS where we find the assembled fibers have a flat interface composed of fused disc subunits. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 160 | Computationally designed bundlemers for hybrid physical-covalent assembly of rigid polymers | Sinha, Nairiti; Jensen, Grethe Vestergaard; Pochan, Darrin | We use bundlemers that form robust antiparallel homotetramers to construct hybrid physical-covalent, supramolecular polymers. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 161 | Random Heteropolymer Self-Assembly into Protein-Like Nanoparticles | Hilburg, Shayna; Xu, Ting; Alexander-Katz, Alfredo | Here, we study self-assembled single polymer nanoparticles to gain molecular insights into their structure and dynamics using molecular dynamics simulations. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 162 | Utilizing nonlinearity of biopolymer matrix in both intracellular and extracellular spaces | Guo, Ming | In this talk, I will present our recent progress on characterizing the drastic local nonlinear matrix stiffening induced by contraction of individual living cells inside a 3D biopolymer matrix, through direct micromechanical measurement. | Session 8: Biopolymers, Polymer Bioconjugates, and Their Self-Assembled Phases |
| 163 | Autonomous synthesis and assembly of a ribosomal subunit on a chip | Levy, Michael; Falkovich, Reuven; Daube, Shirley; Bar-Ziv, Roy | Autonomous synthesis and assembly of a ribosomal subunit on a chip | Session 9: Biopolymers: Nucleic Acids and Structural |
| 164 | The formation of filopodia bridge and intercellular nanotube : A Critical rule of torque and restorative force. | Lee, O-chul; Chang, Minhyeok; Oh, Jaeho; Lee, Jong-Bong; Jeon, Jae-Hyung | In this study, we quantitatively investigate the conformation, stability, and dynamics of the filopodia in comparison with the experiment by using the Langevin dynamics simulation. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 165 | A novel coarse-grained energy functions for RNA folding | ZHANG, DONG; Chen, Shi-Jie | We recently developed a novel approach to extract RNA coarse-grained energy functions from the structural database. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 166 | Non-ergodic transport and conformational dynamics of DNA in biomimetic cytoskeleton networks | Garamella, Jonathan; aguirre, gina; Regan, Kathryn; McGorty, Ryan; Robertson-Anderson, Rae | Here, we use single-molecule conformational tracking (SMCT) to elucidate the transport properties and conformational dynamics of linear and relaxed circular (ring) DNA in in vitro composite networks of actin and microtubules with variable types of crosslinking. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 167 | Single nucleotide polymorphisms affect RNA-protein interactions at a distance through modulation of RNA secondary structures | Bundschuh, Ralf; Shatoff, Elan | Here, we use a modified version of the Vienna RNA folding package and PAR-CLIP data for HuR (ELAVL1) in humans to characterize the genome-wide effect of single nucleotide polymorphisms on HuR binding and show that they can have a many-fold effect on the affinity of HuR binding to RNA transcripts from tens of bases away. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 168 | COARSE-GRAINED MODELING OF DNA PLECTONEME FORMATION IN THE PRESENCE OF BASE-PAIR MISMATCHES | Desai, Parth Rakesh; Das, Siddhartha; Neuman, Keir | We develop a simulation framework using the oxDNA model to study the effect of mismatches on both positively and negatively supercoiled DNA. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 169 | A quantitative model of temperature actuated DNA origami nanocaliper constructs | Crocker, Kyle; Johnson, Joshua; Castro, Carlos; Bundschuh, Ralf | We develop a physical model of this system that uses partition function analysis of the interaction between the nanocaliper and nanoparticle to predict the probability that the nanocaliper is open at a given temperature. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 170 | A dynamic model of DNA Supercoiling | Wan, Biao; Yu, Jin; Xu, Xinliang | Based on this time separation, we developed a new model where the fast mechanical balancing dynamics are coarse grained. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 171 | Real-Time Tracking and Quantification of Transposible Element Activity | Kaur, Davneet; Lee, Gloria; Sherer, Nicholas; Urriola, Elliot; Kim, Hneil; Xue, Chi; Martini, K. Michael; Goldenfeld, Nigel; Kuhlman, Thomas | We show that we can obtain a deeper understanding of the roles of TEs and their individual proteins through our analysis. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 172 | Simulating the Polarization Effects of Gas-Phase Nucleic Acids | Myers, Christopher; Chen, Alan | In the work presented here, we explore the dynamical properties an appropriately tuned electrostatic force field for gas phase nucleic acids should replicate. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 173 | Existence of the B-Form DNA helix in nanoDNA liquid crystals and its variation due to aggregate assembly | Smith, Gregory; Fraccia, Tommaso; Zhernenkov, Mikhail; Bellini, Tommaso; Clark, Noel | We show using diffraction of a synchrotron X-ray microbeam that liquid crystalline aggregates of 12mer nanoDNA, such as the Drew-Dickerson Dodecamer (DD), demonstrate a B-form DNA double helix with a comparable degree of order to that seen in longer DNA, such as the calf-thymus DNA used by Rosalind Franklin to produce the historic Photo 51. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 174 | Constructing Out-of-plane Auxetic Response in Paper | Verma, Prateek; Griffin, Anselm; Shofner, Meisha | In this research, we apply our understanding of this mechanism to construct auxetic paper handsheets. | Session 9: Biopolymers: Nucleic Acids and Structural |
| 175 | “Cellular Stokesian Dynamics”: a computational model for biological cells | Zia, Roseanna; Endy, Drew; Maheshwari, Akshay; Gonzalez Gonzalez, Emma del Carmen; Sunol, Alp | I will discuss our physics-based computational model of a biological cell, where biomolecules and their interactions are physically represented, individually and explicitly. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 176 | The roles of patchy attractions and Brownian motion in fundamental biological processes in a model cell | Hofmann, Jennifer; Zia, Roseanna | Here, we present our results investigating the structure and dynamics of these coarse-grained systems, probing the inseparable connection between colloidal-scale transport and biological function. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 177 | The structure of tubular organelle networks can accelerate diffusive transport and kinetics | Brown, Aidan; Koslover, Elena | We describe how the structure of these tubular network organelles controls diffusive search times and kinetic rates, using both analytical calculation and computational simulation of diffusive first-passage times on organelle structures extracted from yeast and mammalian cells. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 178 | Elucidating mechanics of vascular regression in Botryllus schlosseri using image analysis | Madhu, Roopa; Rodriguez, Delany; Guzik, Claudia; Singh, Shambhavi; Tomaso, Anthony; Valentine, Megan; Loerke, Dinah | We examined epithelial tube remodeling in vivo using a novel model system: Botryllus schlosseri vasculature. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 179 | Vesicle formation processes on the Golgi significantly altered by overexpression – Duel FRAP investigation | Sager, Garrett; Sztul, Elizabeth; Kawai, Ryoichi | Specifically, we are investigating two proteins that are vital during initial vesicle formation on the Golgi (GBF1 and Arf1). | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 180 | Probing force balance in the S. pombe mitotic spindle by laser ablation | Zareiesfandabadi, Parsa; Elting, Mary | We find that spindle pole bodies collapse toward each other following ablation, but that spindle geometry is often rescued, allowing spindles to resume elongation. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 181 | Theoretical framework for the description of transmembrane receptor cluster coalescence in cells | Spendier, Kathrin; Kenkre, Vasudev | We present an approximation method for moving boundaries or traps in reaction-diffusion processes that is applied to investigate coalescence of receptor clusters in mast cells. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 182 | Modeling cells as pressurized elastic shells | Golshaei, Behzad; Rezvani, Samaneh; Albarran, Octavio; Schmidt, Christoph | To interpret micro-mechanical optical trapping experiments with suspended rounded eukaryotic cells, we developed finite element simulations and modeled cells as pressurized elastic shells. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 183 | Probing the mechanical integrity of the mammalian k-fiber in live cells by laser ablation and speckle microscopy | Begley, Marcus; Davis, Elizabeth; Ohi, Ryoma; Elting, Mary | Probing the mechanical integrity of the mammalian k-fiber in live cells by laser ablation and speckle microscopy | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 184 | 3D particle diffusion in Escherichia coli cells. | Valverde Mendez, Diana; Bratton, Benjamin; Sheehan, Joseph; Gitai, Zemer; Shaevitz, Joshua | We use Genetically Encoded Multimeric nanoparticles (GEMs) to probe the microrheology of the Escherichia coli cytoplasm. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 185 | Opto-genetic control of gene regulation in living fly embryos | Singh, Anand; Wu, Ping; Wieschaus, Eric; Toettcher, Jared; Gregor, Thomas | In order to construct causal relationships in the programs underlying gene regulatory networks and transcription, we developed a light-inducible system to directly interfere with these programs and to quantitatively measure the cellular response in living fly embryos. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 186 | NMR and small-angle neutron scattering examination of dynamics and structure in a polymer-colloid model system directed at understanding macromolecular crowding in cells | PALIT, SWOMITRA; He, Lilin; Hamilton, William; Yethiraj, Arun; Yethiraj, Anand | In this work [1], we study long-time self diffusion (using pulsed-gradient NMR) and size (via small-angle neutron scattering) of a linear polymer, polyethylene glycol (PEG, radius of gyration $R_g$, and a more compact crowder (polysucrose, radius $R_c$) of varying size ratio $R_g/R_c$. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 187 | Analysis and simulations of Bcl10 self-assembly and degradation in activated T cells | Campanello, Leonard; Traver, Maria; Schaefer, Brian; Losert, Wolfgang | Here, we will provide insights into Bcl10 filament formation and degradation via image analysis and Monte Carlo simulations. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 188 | Investigating the eukaryotic CO2-fixing phase-separated organelle, the pyrenoid | He, Guanhua; He, Shan; Jonikas, Martin; Wingreen, Ned | We use microscale thermophoresis (MST) to determine the dissociation constant (Kd) of EPYC1-Rubisco binding. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 189 | Dynamics of Self-Organized Organelle Transport in a Developing Macroscopic Single-Celled Organism | Afik, Eldad; Meyerowitz, Elliot | In this work we seek to establish a framework to study the dynamics of homeostasis and its stability. | Session 10: Cellular Biophysics: structure, mechanics, and dynamics |
| 190 | Non-equilibrium laser annealing derived mesostructured silicon templated in mesoporous thin film network structures from block copolymer self-assembly | Yu, Fei; Zhang, Qi; Wiesner, Ulrich | Non-equilibrium laser annealing derived mesostructured silicon templated in mesoporous thin film network structures from block copolymer self-assembly | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 191 | Probing Block-Copolymer Self-Assembly Kinetics with In-Situ Spectroscopic Ellipsometry | Bilchak, Connor; Contreas, Guillermo; Govind, Shivajee; Maguire, Shawn; Composto, Russell; Fakhraai, Zahra | In this work, we develop and implement a novel characterization method to monitor the assembly of cylinder- and lamellar- forming block copolymers using spectroscopic ellipsometry, which tracks the optical anisotropy that results from microphase separation of the assembled domains. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 192 | A fluorescence-based method for determining order-disorder transition temperatures in block copolymers | Wang, Muzhou; Qiang, Zhe; Li, Lingqiao; Torkelson, John | We present a technique for observing the order-disorder transition (ODT) in block copolymers through changes in the temperature-dependent behavior of an optically fluorescent probe. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 193 | Evolution of disordered hyperuniformity in block copolymers thin films by homopolymer dilution | Gabinet, Uri; Lee, Changyeon; Osuji, Chinedum | Here, we explore the degree of structural order in BCP thin films and manipulation of such order, through the lens of disordered hyperuniformity. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 194 | Fluctuation/Correlation Effects in Symmetric Diblock Copolymers: On the Disordered Phase | Wang, Yan; Zong, Jing; Yang, Delian; Wang, Qiang | We compare, without any parameter-fitting, the thermodynamic and structural properties of the disordered phase of symmetric diblock copolymers obtained from fast off lattice Monte Carlo (FOMC) simulations [ Q.Wang and Y.Yin, J.Chem.Phys.130,104903(2009)], reference interaction site model (RISM) and polymer reference interaction site model (PRISM) theories, and Gaussian-fluctuation theory for the same model system of discrete Gaussian chains interacting with soft, finite-range repulsion used in the dissipative particle dynamic simulations. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 195 | Multiscale Modeling of Multicompartment Micelle Consisting of Block Copolymers | Mallard, Mackenzie; Lee, Seung Min; Jang, Seung Soon | In this work, we present a procedure for estimating the Flory-Huggins χ-parameter for use in atomistic and mesoscale molecular simulations for multicompartment micelle consisting of multiblock copolymers. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 196 | Direct Observation of Block Copolymer Micelle Fragmentation in Ionic Liquids | Early, Julia; Yager, Kevin; Lodge, Timothy | In this work, the direct observation of fragmentation in 1,2-polybutadiene- block-poly(ethylene oxide) (PB-PEO) micelles in the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide was achieved using high-temperature liquid-phase transmission electron microscopy. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 197 | The Effects of the Size of Crystal Domains to the Polymorphism of Close-Packed Micelles | Lee, Sangwoo; Chen, Liwen; Lee, Han Seung; Zhernenkov, Mikhail | In both transition processes, we found that the polytypes of close-packed block copolymer micelles are regulated by the size of crystal domains. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 198 | Quasiperiodic Ordering of Minimally Hydrated Ionic Surfactant Micelles | Jayaraman, Ashish; Baez-Cotto, Carlos; Mann, Tyler; Mahanthappa, Mahesh | We report the formation of a well-ordered DDQC formed by oil-swollen aqueous dispersions of alkylphosphonate surfactants. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 199 | Processing Path-Dependent Complex Micelle Packings of Hydrated Diblock Polymer Amphiphiles | Mahanthappa, Mahesh | In spite of the low molecular weight of the constituent amphiphile, we recently demonstrated that judicious thermal processing of an A15 LLC enables formation of a surprisingly long-lived, non-equilibrium state. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 200 | Expanding spherical regions of block copolymers via designed chain architectures | Qiang, Yicheng; Li, Wei-hua | Herein, we propose a useful mechanism, and thus we design a series of dendron-like AB-type block copolymers. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 201 | Exotic Phase Behaviors of Purposely Designed Dendron-Like Block Copolymers | Qiang, Yicheng; Li, Wei-hua | We observe many exotic phase behaviors in these phase diagrams, especially about the change of the stability regions of different spherical phases including the classical BCC phase and complex Frank-Kasper phases. To demonstrate how spherical regions change non-monotonically as τ, we construct a large set of phase diagrams for different τ values. | Session 11: Characterization of Non-Equilibrium or Exotic Structures of Polymers |
| 202 | Spontaneous Appearance of Chiral Structures from Lyotropic Liquid Crystals in Confinement | Srinivasarao, Mohan; Nayani, Karthik; Chang, Rui; Fu, Jinxin; Park, Jung O | In this talk, I intend to discuss the appearance of chiral structures from a class of liquid crystals, the so-called lyotropic liquid crystals. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 203 | Threading the Spindle: A Geometric Study of Chiral Liquid Crystal Polymer Microparticles | Ansell, Helen; Kim, Dae Seok; Kamien, Randall; Katifori, Eleni; Lopez-Leon, Teresa | In this study we investigate the swelling behavior of chiral twisted spindle-shaped polymer microparticles, which are formed due to the anisotropic contraction of spherical bipolar polymer liquid crystalline microparticles during deswelling. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 204 | Chiral nematic liquid crystals in cylinders: Layering transition and conservation of layer structure | Eun, Jonghee; Kim, Sung-Jo; Jeong, Joonwoo | Chiral nematic liquid crystals in cylinders: Layering transition and conservation of layer structure | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 205 | Truth about the origin of twist – a circular argument | Matsumoto, Elisabetta; Dastan, Alireza; Cleaver, Doug | We examine emergent twist by applying both simulation and molecular theory to chromonic amphiphiles. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 206 | Thermoresponsive Colloidal Chains Collapse to Form Helices | Biswas, Bipul; Fayis, KP; Bhat, Suresh; Kumaraswamy, Guruswamy | Here, we demonstrate that these chains exhibit thermally-induced reversible transitions. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 207 | Skyrmion formation and organization on a shell | Palacio-Betancur, Viviana; Durey, Guillaume; Cohen, Alexander; Sadati, Monirosadat; López León, Teresa; Hernandez-Ortiz, Juan; De Pablo, Juan | Beyond confinement in a channel, here, we consider the effect of curvature by confining a ChLC in spherical shells. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 208 | Peculiar Phase Morphologies from Twisting of Self-Assembled Ribbons in Chiral Block Copolymers | Yang, Kai-Chieh; Ho, Rong-Ming | Peculiar Phase Morphologies from Twisting of Self-Assembled Ribbons in Chiral Block Copolymers | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 209 | Folding of chiral colloidal membranes | Sharma, Prerna; Saikia, Lachit; Khanra, Ayantika; Dogic, Zvonimir | Folding of chiral colloidal membranes | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 210 | Self-assembly of chiral networks in achiral block copolymer systems using coarse-grained simulations | Buchanan, Natalie; Browka, Krysia; Ketcham, Lianna; Le, Hillary; Padmanabhan, Poornima | In this talk, we investigate the self-assembly of model achiral block copolymers into alternating gyroid morphologies using coarse-grained molecular simulation. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 211 | Amino Acids as RNA-Folding Chaperones: Single Molecule Experiments Reveal Chiral Sensitivity | Nicholson, David; Nesbitt, David | The kinetic and thermodynamic features of this chiral interaction are presented, and with the help of all-atom molecular dynamics simulations, we propose a mechanistic interpretation of these results based on nonspecific arginine-RNA interactions. | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 212 | Insensitivity of Sterically-Defined Helical Chain Conformation to Solvent Quality in Dilute Solution | Yu, Beihang; Danielsen, Scott; Yang, Kai-Chieh; Ho, Rong-Ming; Walker, Lynn; Segalman, Rachel | Insensitivity of Sterically-Defined Helical Chain Conformation to Solvent Quality in Dilute Solution | Session 12: Chirality in Polymers and Soft Matter: From Molecular to Hierarchical Scales |
| 213 | Coherent Nonlinear Optical Microscopy with Mid-infrared Radiation | Knez, Dave; Prince, Richard; Hanninen, Adam; Potma, Eric | We will discuss several coherent nonlinear optical approaches that enable rapid laser-scanning microscopy in the MIR with high, three-dimensional resolution. | Session 13: Coherent Nonlinear Optical Microscopy |
| 214 | Multidimensional spectroscopy on the microscale: Development of a multimodal imaging system incorporating 2D white-light spectroscopy, broadband transient absorption, and atomic force microscopy. | Jones, Andrew; Kearns, Nicholas; Bohlmann Kunz, Miriam; Flach, Jessica; Zanni, Martin | We present a combined coherent multidimensional spectroscopy and microscopy system using visible white-light supercontinuum pulses as a broadband light source. | Session 13: Coherent Nonlinear Optical Microscopy |
| 215 | Image Formation in Coherent Nonlinear Optical Microscopy | Ramunno, Lora | I will discuss the origin of these strage effects, and review our work and others in this area over the last several years. | Session 13: Coherent Nonlinear Optical Microscopy |
| 216 | Strong-field-driven dynamics and high-harmonic generation in interacting 1D systems | Sols, Fernando; de Vega, Sandra; Cox, Joel; de Abajo, Javier Garcia | We explore the role of electronic band structure and Coulomb interactions in solid-state HHG by studying the optical response of linear atomic chains and carbon nanotubes to intense ultrashort pulses. | Session 13: Coherent Nonlinear Optical Microscopy |
| 217 | Broadband Coherent Anti-Stokes Raman Scattering (BCARS) MicroSpectroscopy | Camp, Charles | In this seminar, I will present an introduction to BCARS microscopy from a theoretical and practical perspective. | Session 13: Coherent Nonlinear Optical Microscopy |
| 218 | Studying the photodynamics of FRET paired fluorescent molecules near gold nanogratings | Steele, Jennifer; Ramnarace, Chae; Farner, WIlliam | In this talk, ongoing work on the optimizing the increase in efficiencies will be discussed. | Session 13: Coherent Nonlinear Optical Microscopy |
| 219 | Geophotonics: Multimodal Nonlinear Optical Microscopy in Geology | Pegoraro, Adrian | Nonetheless, we show that these techniques, such as second harmonic generation, coherent Raman microscopy, and pump-probe microscopy, provide complementary contrast mechanisms for a host of geological systems. | Session 13: Coherent Nonlinear Optical Microscopy |
| 220 | Nonlinear Pump-Probe Microscopy Improves Early Detection of Metastatic Melanoma | Warren, Warren; Grass, David; Fischer, Martin; jia, xiaomeng | In this talk we focus on our efforts of translating pump-probe microscopy into clinics and our current status on detection of metastatic disease of melanoma. | Session 13: Coherent Nonlinear Optical Microscopy |
| 221 | Visualizing molecular structure and function in soft matter using coherent Raman imaging | Parekh, Sapun | In this talk, I will present an overview of our recent work using nonlinear vibrational spectroscopic imaging to reveal unique structural-function relationships in polymeric soft matter systems. | Session 13: Coherent Nonlinear Optical Microscopy |
| 222 | Correlating Multiphoton-Absorption-Induced Luminescence (MAIL) with Morphology in Noble-Metal Nanostructures | Grafov, Anna; Lin, Xiaoying; Dawood, Farah; Fourkas, John | We examine how the morphologies of noble-metal nanostructures correlate with their MAIL signals. | Session 13: Coherent Nonlinear Optical Microscopy |
| 223 | Stimulated Raman scattering spectroscopic optical coherence tomography | Robles, Francisco | Here we will present a theoretical framework for SRS-SOCT, discuss its advantages and limitations, and show experimental results from excised tissues. | Session 13: Coherent Nonlinear Optical Microscopy |
| 224 | Spectroscopic Fourier-Transform Coherent Raman Microscopy | Cicerone, Marcus; Audier, Xavier; Chen, Wei-Wen; Sharon-Frilling, Ronit | I will briefly introduce spectroscopic CRI, specifically broadband coherent anti-Stokes Raman scattering (BCARS) , discussing key features required to make these methods practical, current impedements to improvements in speed and sensitivity, and new approachs we are taking to overcome these impedements. | Session 13: Coherent Nonlinear Optical Microscopy |
| 225 | Shape and Interaction Decoupling for Colloidal Pre-Assembly | Baldauf, Lucia; Teich, Erin; Van Anders, Greg; Schall, Peter; Rossi, Laura | Here, we show that pre-assembled colloidal structures achieving geometric and interaction decoupling can be prepared in emulsions of silica superballs, which are cubic-like particles with rounded edges. | Session 14: Colloids |
| 226 | Topological states of hard rods in extreme annular confinement | Wittmann, René; Cortes, Louis; Aarts, Dirk; Löwen, Hartmut | Applying FMMT to hard discorectangles in two dimensions, we map out a full phase diagram. | Session 14: Colloids |
| 227 | Do cavities matter? Suppression of crystallization in hollow microgel solutions | Scotti, Andrea; Denton, Alan; Brugnoni, Monia; Schweins, Ralf; Richtering, Walter | Here we study the phase behavior of hollow microgels, characterized by a solvent-filled cavity in their center. | Session 14: Colloids |
| 228 | Buckling of 2D complex plasma crystals | Zampetaki, Alexandra; Ivlev, Alexei; Loewen, Hartmut | In this talk I will present some very recent theoretical results about the ways in which the existence of plasma wakes affects the structure of complex plasma crystals under a harmonic confinement. | Session 14: Colloids |
| 229 | Tuning Interactions between Charged Structured Colloids and Hydrophobic Salts for the Production of Pickering Emulsifiers | Scott, Douglas; Prud’homme, Robert; Priestley, Rodney | In this work, the FNP of homopolymers with ionomer analogs is presented as a route for the tunable expression of charge groups on distinct hemispheres of Janus particles. | Session 14: Colloids |
| 230 | Bayesian inference of particle size distributions from dynamic light scattering | Le, Thy Doan Mai; Fung, Jerome | We present open-source tools for performing Bayesian inference of particle size distributions while rigorously incorporating smoothness and non-negativity constraints on the inferred distributions. | Session 14: Colloids |
| 231 | Confinement of colloidal smectic phases | Cortes, Louis; Wittmann, René; Dullens, Roel; Löwen, Hartmut; Aarts, Dirk | We report on the confinement of colloidal liquid crystals in three dimensional chambers. | Session 14: Colloids |
| 232 | Molecular dynamics simulations resolve the encapsulation of testosterone propionate by both solid and liquid lipid nanoparticles | Pink, Demi; Lawrence, Jayne; Lorenz, Christian | In this work we have characterised the structure and formation of LLNs by means of small angle neutron scattering and atomistic molecular dynamics simulations. | Session 14: Colloids |
| 233 | Dynamics and contact microstructure of rough colloids | Pradeep, Shravan; Hsiao, Lilian | We use confocal microscopy to obtain 3D image-stacks of the colloidal suspensions and process them to obtain particle centroids with subpixel precision. | Session 14: Colloids |
| 234 | Liquid crystal-mediated growth and assembly of polymer colloids | Wei, Xiaoshuang; Bradley, Laura | In our work, we demonstrate simultaneous growth and assembly of polymer colloids at LC-air interfaces. | Session 14: Colloids |
| 235 | Holographic Perfusion Porosimetry of Individual Colloidal Particles | Grier, David; Odete, Mary Ann; Cheong, Fook; Winters, Annemarie; Elliott, Jesse; Philips, Laura | We demonstrate through experiments on mesoporous silica spheres, protein aggregates and nanoparticle agglomerates that the effective-sphere model consistently accounts for the influence of the medium on the particle’s measured effective refractive index.This dependence yields information on the particles’ structure and composition that cannot be obtained in other ways, including their porosity, the polydispersity of their porosity, and the size distribution and connectivity of their pores. | Session 14: Colloids |
| 236 | Controlling the flexible polymer – hard colloid duality of temperature-responsive microgels at interfaces by the adsorption pathway | Schulte, Marie Friederike; Scotti, Andrea; Bochenek, Steffen; Brugnoni, Monia; Richtering, Walter | We study the effect of the adsorption pathway on the morphology and temperature-induced collapse of PNIPAM microgels at the solid/liquid interface by means of atomic force microscopy (AFM). | Session 14: Colloids |
| 237 | Localization to delocalization transitions in size asymmetric mixtures of colloidal particles with grafted chains | Lopez Rios, Hector Manuel; Ehlen, Ali; Olvera De La Cruz, Monica | We develop a simplified molecular dynamics model to study these colloidal systems and the nature of the delocalization of the smaller species under varied conditions. | Session 14: Colloids |
| 238 | Two Coupled Mechanisms Produce Fickian, yet non-Gaussian Diffusion in Heterogeneous Media | Chakraborty, Indrani; Roichman, Yael | Specifically, we study the diffusion of fluorescent colloidal particles in a matrix of lithographically fabricated micropillar arrays having a range of structural configurations: from completely ordered to completely random. | Session 14: Colloids |
| 239 | Comparison of different approaches to single particle tracking of enzymes displaying enhanced diffusion | Xu, Mengqi; Ross, Jennifer | We found that while the overall mobility of enzyme is improved by 2-3 folds at saturated substrate concentration, the mode of diffusion remains Brownian. | Session 15: Composite Active Materials |
| 240 | Vortices, space-time braids and loops in the membrane of a living cell. | Liu, Jinghui; Miller, Pearson; Dunkel, Jörn; Fakhri, Nikta | Here, we show a defect-mediated turbulence underlies the complex wave propagation patterns of Rho-GTP signaling proteins on the membrane of starfish oocytes. | Session 15: Composite Active Materials |
| 241 | Creation and evolution of defects in composite biopolymer nematics | Weirich, Kimberly; Zhang, Rui; De Pablo, Juan | Here we present a composite structured liquid formed from biopolymers of distinct rigidities, actin and DNA. | Session 15: Composite Active Materials |
| 242 | Microtubule based composite active matter | Dogic, Zvonimir | Microtubule based composite active matter | Session 15: Composite Active Materials |
| 243 | Information and motility exchange in collectives of active particles | Paoluzzi, Matteo; Leoni, Marco; Marchetti, M Cristina | In a minimal model of information exchange, we have studied numerically run-and-tumble runners with an additional two-state internal variable that specifies their motile or nonmotile state. | Session 15: Composite Active Materials |
| 244 | Corralling Active Brownian Particles With "Active Billiard" Particles | Nilles, Alexandra; Pervan, Ana; Berrueta, Thomas; Murphey, Todd | We will present extensions of this theoretical approach to statistical models of our example active matter system, with a focus on developing strategies for control. | Session 15: Composite Active Materials |
| 245 | Spontaneous demixing of mixed active-passive suspensions. | Polin, Marco; Williams, Steven; Jeanneret, Raphaël | We show that this can be used to induce the system to de-mix spontaneously. | Session 15: Composite Active Materials |
| 246 | Unifying descriptions of phase separation in multi-component driven, steady-state systems. | Watson, Garrett; Luijten, Erik | Combined experimental and computational work has shown that a nonequilibrium driven system of Janus particles exhibits phase behavior that is accurately described by the standard Ising model. | Session 15: Composite Active Materials |
| 247 | Phase Diagram of a 2D system of Granular Self-propelled Particles | Shen, Zhejun; Menon, Narayanan | We report experiments on the phase behaviour of granular squares as a function of number density and activity. | Session 15: Composite Active Materials |
| 248 | Irreversibility in biological active matter | Fakhri, Nikta | In this talk, I will address the question: why measure dissipation in such nonequilibrium systems? | Session 15: Composite Active Materials |
| 249 | Ion Transport Mechanisms in Ionomers | Frischknecht, Amalie; Thurston, Bryce; Bollinger, Jonathan; Stevens, Mark; Paren, Benjamin; Winey, Karen | I will describe the ionic aggregate and ion dynamics in atomistic molecular dynamics (MD) simulations of precise polyethylene-based ionomers. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 250 | Confined polyelectrolyte solution driven by an external electric field | Bagchi, Debarshee; Olvera De La Cruz, Monica | We study the dependence of the transport features on the diameter of the confinement, the presence of polarization effects, and on multivalent salts. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 251 | Ion Correlations and Transference Number in Model Polymer Electrolytes: Effects of Ion Size and Dielectric Strength | Shen, Kuan-Hsuan; Hall, Lisa | By understanding the impact of ion size, polarizability, and polymer dielectric strength on ion correlations, diffusion, and transference number, we aim to help guide design of future materials with improved conduction. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 252 | Influence of Water Content and Morphology on Proton Transport in Biocompatible Conductive Polymer Membranes | Bazargan, Gloria; Fischer, Sean; Gunlycke, Daniel | Influence of Water Content and Morphology on Proton Transport in Biocompatible Conductive Polymer Membranes | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 253 | Effects of Homopolymer Additives on Conductivity of Salt-Doped Block Copolymers from Molecular Dynamics Simulations | Fan, Mengdi; Hall, Lisa | To understand this effect and guide further study, we employ coarse-grained molecular dynamics (MD) simulations. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 254 | Can solvation free energy rationalize the phase behavior of ion-doped copolymers? | Qin, Jian; Hou, Kevin; Loo, Whitney; Balsara, Nitash | Previous experimental studies have established the pronounced effects of salt-doping on the morphological behavior of copolymers. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 255 | Densely Grafted Polyelectrolyte Brushes Trigger “Water-in-Salt” like Scenarios and Ultraconfinement Effect | Sachar, Harnoor; Pial, Turash; Desai, Parth Rakesh; Etha, Sai Ankit; Wang, Yanbin; Chung, Peter; Das, Siddhartha | We observe a most remarkable ultraconfinement effect created by the brushes, quantified by orders of magnitude reduction in the mean squared displacement (MSD) of counterions and water molecules. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 256 | Ion Transport in Pendant and Backbone Polymerized Ionic Liquids | Matsumoto, Atsushi; Kuray, Preeya; Noda, Takeru; Iacob, Ciprian; Inoue, Tadashi; Hickner, Michael; Runt, James | Here, we examined the ion transport, morphology, and dynamics of imidazolium-based pendant and backbone PILs with TFSI, CPFSI, and NfO counter-anions. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 257 | Tailoring Ion Transport Properties of Block Copolymer Electrolytes with End-functionalized Homopolymer Addition | KIM, JIHOON; Park, Moon Jeong | In this study, we report a new means of controlling PEO crystallinity of block copolymers by blending end-group functionalized PEO homopolymers. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 258 | Mechanisms of Ion Transport in Polymeric Ionic Liquids | Ganesan, Venkatraghavan | In this talk, I discuss some recent developments in the context of PILs trelating to the issue of ion transport in such materials.We focus on the mechanisms of ion transport in such materials, the influence of counterions, and whether such materials do live upto the promise of hgh transference numbers. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 259 | Quantifying Intrinsic Interfacial Transport Properties in Block Copolymer Electrolytes | Bennington, Peter; Sharon, Daniel; Webb, Michael; De Pablo, Juan; Nealey, Paul; Patel, Shrayesh | Here, we present a new platform to probe defect-free single grains of any block copolymer electrolyte. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 260 | Multifunctional polymer electrolyte networks for energy harvesting and storage | Albehaijan, Hamad; Kyu, Thein | Multifunctional polymer electrolyte networks for energy harvesting and storage | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 261 | Low-Voltage Reversible Electro-Adhesion of Ionoelastomer Junctions | Kim, Hyeong Jun; Paguin, Lindsay; Barney, Christopher; Suo, Zhigang; Crosby, Alfred; Hayward, Ryan | Here, we investigate how the voltage drop across the IDL can be modulated to reversibly control the adhesion between two ionoelastomers. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 262 | Ion Confinement in Self-Assembled Precisely Segmented Polyolefin Ionomers | Winey, Karen; Yan, Lu; Park, Jinseok; Mecking, Stefan | We report a series of precisely-segmented polyethylene-like ionomers containing sulfonate groups (PES) with Li+, Na+, Cs+, or NBu4+ counterions synthesized from step-growth polymerization. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 263 | Unraveling how nanoconfinement and phase-separation affect the transport properties of ionomer membranes | Zhang, Rui; Chen, Ying; Troya, Diego; Madsen, Louis | This talk will focus on the nano-scale structure-transport relations of ionomer membranes. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 264 | Polymeric Ionic Liquid-Ligand Gels Exhibiting Transient Gel Behavior and Multivalent Ion Conductivity | Jones, Seamus; Michenfelder-Schauser, Nicole; Fredrickson, Glenn; Segalman, Rachel | Polymeric Ionic Liquid-Ligand Gels Exhibiting Transient Gel Behavior and Multivalent Ion Conductivity | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 265 | Hydroxide conducting block copolymers | Elabd, Yossef | In this work, an overview of hydroxide ion transport (a property that is proportional to fuel cell performance) in block copolymers will be presented and the subsequent impact of block copolymer morphology on ion transport (conductivity), where the careful design of block copolymer chemistry and chain architecture can accelerate hydroxide ion transport and subsequently alkaline fuel cell performance. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 266 | Simulation of Ion Transport through Percolated Aggregates in Precise Sulfophenylated Polyethylene Ionomers | Thurston, Bryce; Stevens, Mark; Paren, Benjamin; Winey, Karen; Frischknecht, Amalie | In order to gain greater understanding at the microscopic level, we perform fully atomistic molecular simulations to probe the assembled ionic aggregates of sulfophenylated polyethylene ionomers with a spacing of five carbon atoms between pendant groups (p5PhS), neutralized with a series of cations (Li, Na, and Cs). | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 267 | Mechanisms of Ion Transport in Block Copolymeric Polymerized Ionic Liquids | Zhang, Zidan; Krajniak, Jakub; Keith, Jordan; Ganesan, Venkatraghavan | We present the results of a multiscale simulation framework investigating the ion transport mechanisms in multicomponent polymerized ionic liquids. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 268 | Composition fluctuation in weakly heterogeneous dielectric medium containing ions | Kong, Xian; Hou, Kevin; Qin, Jian | We present an analysis of the composition fluctuation that couples, through the heterogeneous dielectric profile, to the ionic solvation in the weakly heterogeneous regime. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 269 | Permeation and copermeation behavior of methanol and acetate in cation exchange membranes | Kim, Jung Min; Beckingham, Bryan | We utilize in situ ATR FTIR spectroscopy to quantify the multicomponent transport of molecules and polyatomic ions through ion exchange membranes. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 270 | Percolated ionic aggregates in precise sulfophenylated polyethylene ionomers: Morphology and ion transport | Paren, Benjamin; Thurston, Bryce; Kennemur, Justin; Stevens, Mark; Frischknecht, Amalie; Winey, Karen | We present a set of precise single-ion conducting ionomers that demonstrate decoupled transport of metal cations within self-assembled percolated aggregates in glassy polymer matrices. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 271 | Investigation of monomer segment distributions, chain conformations, and lithium salt solvation in self-assembled, tapered block polymer electrolytes | Ketkar, Priyanka; Shen, Kuan-Hsuan; Hall, Lisa; Epps, Thomas | In this work, we studied the microscopic characteristics of TBPs that impart these enhanced properties. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 272 | Model single ion conducting polymer networks for understanding the impact of ion content, crosslink density, and side chain length on Li transport | Evans, Christopher; Shen, Chengtian | Model single ion conducting polymer networks for understanding the impact of ion content, crosslink density, and side chain length on Li transport | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 273 | Salt-tethered nanoparticles in solvent: A potential high conductivity, high lithium transference number electrolyte system | Kadulkar, Sanket; Milliron, Delia; Truskett, Thomas; Ganesan, Venkatraghavan | In this work, using computer simulations, we model a relatively new class of electrolyte system, reported in a recent work [ Chem. | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 274 | Cluster Cohesion Effects on Segmental Dynamics in Ionic Polymer Solutions: Molecular Dynamics Simulation Studies | Kosgallana, Chathurika; Wijesinghe, Sidath; Senanayake, Manjula; Kamkanam Mohottalalage, Supun Samindra; Zolnierczuk, Piotr; Grest, Gary; Perahia, Dvora | Cluster Cohesion Effects on Segmental Dynamics in Ionic Polymer Solutions: Molecular Dynamics Simulation Studies | Session 16: Confinement, Dynamics, and Ion Interactions in Ion-Containing Polymers |
| 275 | Early Career Award for Soft Matter Research talk | Sacanna, Stefano | In this talk, I will break down and categorize the wide selection of colloidal reactions available by using an analogy to synthetic chemistry, helping to index and navigate the ever-expanding colloidal toolbox. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 276 | Colloidal Diamond Crystals | He, Mingxin; Gales, Johnathon; Ducrot, Etienne; Gong, Zhe; Yi, Gi-Ra; Sacanna, Stefano; Pine, David | Here, we show that by using partially compressed clusters with retracted sticky patches, colloidal cubic diamond can be self-assembled using patch-patch adhesion together with a steric interlock mechanism that selects the proper staggered bond orientation. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 277 | Colloidal Diamond Photonic Bands | Gales, Johnathon; He, Mingxin; Pine, David | We have designed a new set of patchy tetrahedral colloidal clusters that can self-assemble into a diamond lattice. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 278 | Photonic band gaps in self-assembled colloidal structures | Wan, Duanduan; Glotzer, Sharon | Using computer simulations, we explore the effect of thermal disorder on the photonic band gap in a self-assembled photonic crystal. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 279 | Rational Design of Patchy Colloids Capable of Self-Assembling into Open Crystal Lattices with Complete Photonic Bandgaps | Ma, Yutao; Ferguson, Andrew | A main challenge in the self-assembly of patchy colloids is the design of colloidal geometry and chemistry that favor the formation of target structure thermodynamically and kinetically. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 280 | Nanoparticle Superlattices with Polymer Ligands | Travesset, Alex; Horst, Nathan; Xia, Jianshe; Guo, Hongxia | Interestingly, the Orbifold Topolgical Model (OTM) that successfully characterizes the nanocrystal interaction in the colloidal limit, quantitatively describes the polymer limit as well. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 281 | Binary colloidal compounds with depletants | Ehlen, Ali; Lopez Rios, Hector Manuel; Olvera De La Cruz, Monica | This talk will address the impact of the presence of depletants in both the compounds and in the sublattice-melted crystals, as well as the relative significance of the attractive interaction between the particles and the depletion forces. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 282 | Phase Diagram and Structure Map of Binary Nanoparticle Superlattices from a Lennard-Jones Model | Ren, Shang; Sun, Yang; Zhang, Feng; Travesset, Alex; Wang, Cai-Zhuang; Ho, Kai-Ming | In this work, we show that a binary system interacting through Lennard-Jones (LJ) potential predicts all phases reported in experiments in which nanoparticles are effectively described as quasi hard spheres. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 283 | Novel mesophase behavior in two-dimensional binary solid solutions | Bangalore Prakash, Prajwal; Escobedo, Fernando | Novel mesophase behavior in two-dimensional binary solid solutions | Session 17: DSOFT Early Career Award and Directed Assembly |
| 284 | Diffusion of DNA-coated colloids on DNA coated surface | Zheng, Jeana(Aojie); Marbach, Sophie; Holmes-Cerfon, Miranda; Pine, David | Here we report on the diffusion of DNA-coated colloidal spheres on a flat DNA-coated substrate. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 285 | 3D self-replication of DNA nanostructures | Zhou, Feng; Ni, Heng; Sha, Ruojie; Seeman, Nadrian; Chaikin, Paul | Here, we report the direct self-replication of a 3D object. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 286 | Self-assembled helical structures of ABCD star tetrablock copolymer within cylindrical confinement | Chokshi, Paresh; Gupta, Supriya | In order to generate novel multicomponent helical structures, we investigate the four-armed ABCD star tetrablock copolymers for their equilibrium states under cylindrical nanopore confinement with the help of self-consistent field theory. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 287 | Toward generating colloidal cubic phases: Shape sensitivity of the Ia(-3)d gyroid phase in hard pear-shaped particle systems | Schönhöfer, Philipp; Schroeder-Turk, Gerd | We address the entropically driven colloidal self-assembly of tapered ellipsoids, reminiscent of "pear-shaped" particles, including the formation of structures based on triply periodic minimal surfaces (TPMS) such as the gyroid. | Session 17: DSOFT Early Career Award and Directed Assembly |
| 288 | Hyperuniform structures formed by shearing colloidal suspensions | Wilken, Sam; Guerra, Rodrigo; Pine, David; Chaikin, Paul | Here we show that the particles in periodically sheared suspensions organize into structures with anisotropic short-range order but isotropic, long-range hyperuniform order when oscillatory shear amplitudes approach the critical strain amplitude. | Session 18: Directed Assembly 2: Field Driven |
| 289 | Optimized Large Hyperuniform Binary Dipolar Colloidal Suspensions in Two Dimensions | Ma, Zheng; Lomba, Enrique; Torquato, Salvatore | We have developed a protocol to guide experimentalists to fabricate large disordered hyperuniform two-phase system in two dimensions by binary colloidal particles. | Session 18: Directed Assembly 2: Field Driven |
| 290 | Assembly of gold nanoparticles directed by light polarization | Samaimongkol, Panupon; See, Erich; Peck, Cheryl; Santos, Webster; Robinson, Hans | Assembly of gold nanoparticles directed by light polarization | Session 18: Directed Assembly 2: Field Driven |
| 291 | Acoustokinetics: Organizing Soft Matter with Acoustic Holograms | Abdelaziz, Mohammed; Grier, David | Acoustokinetics: Organizing Soft Matter with Acoustic Holograms | Session 18: Directed Assembly 2: Field Driven |
| 292 | Landau theory of complex spherical packing phases | Dawson, Sarah; McClenagan, Duncan; Shi, Anchang | Motivated by this result, we studied how the shape of the free-energy about its optimal wave number can influence the relative stability of the complex phases over the BCC and FCC spherical phases. | Session 18: Directed Assembly 2: Field Driven |
| 293 | Templated assembly of self-propelled particles in targeted micromachines | Aubret, Antoine; Palacci, Jeremie | In this talk, I will show how we can carve non-equilibrium pathways for the controlled self-assembly of active microparticles using light as a tool. | Session 18: Directed Assembly 2: Field Driven |
| 294 | Synchronization of colloidal oscillators | Huang, Jinzi; Li, Yaocheng; Aubret, Antoine; Palacci, Jeremie | Indeed, interactions between dynamical systems promote synchronization, and we aim to study such phenomena on a micro scale by designing colloidal oscillators. | Session 18: Directed Assembly 2: Field Driven |
| 295 | Development of surface composition and ordering during reverse-emulsion assembly of binary colloidal particle mixtures | Heil, Christian; Gartner, Thomas; Jayaraman, Arthi | In this talk, we will present our recent work using coarse-grained Langevin dynamics simulation that mimics reverse-emulsion directed assembly of binary nanoparticle mixtures into supraballs. | Session 18: Directed Assembly 2: Field Driven |
| 296 | Enhanced Diffusion and Magnetophoresis of Paramagnetic Colloidal Particles in Rotating Magnetic Fields | Sherman, Zachary; Pallone, Julia; Erb, Randall; Swan, James | Here, we investigate the transport properties of paramagnetic colloids in rotating magnetic fields using dynamic simulations. | Session 18: Directed Assembly 2: Field Driven |
| 297 | Mesoscale simulation approach for dynamics and assembly of deformable objects | Bello, Toluwanimi; Shastry, Tejus; Lee, Sangwoo; Underhill, Patrick | In this talk, we will describe the application of vertex models to small deformable objects. | Session 18: Directed Assembly 2: Field Driven |
| 298 | Ordering and Interactions of Gold Nanoparticles (AuNPs) with Fractional Surface Coverage of Ligands | Reik, Morgan; Liepold, Chris; Griesemer, Sean; Bu, Wei; Smith, Alex; Rice, Stuart; De Pablo, Juan; Lin, Binhua | The equilibrium coverage of AuNPs is adequately described by Langmuir adsorption kinetics, and, therefore, we interpret the way in which varying thiol concentration affects the nanoparticle-nanoparticle interactions as a function of surface coverage of the Au core [1]. | Session 18: Directed Assembly 2: Field Driven |
| 299 | Divine Proportions and the Fractal Dimension of DLCA Aggregates | Sorensen, Chris | Here I present a restricted hierarchical model of diffusion limited cluster-cluster aggregation (DLCA). | Session 18: Directed Assembly 2: Field Driven |
| 300 | Polydisperse Gold Nanocrystals and Hard Sphere Diameters | Zha, Xun; Travesset, Alex | In this talk, I will provide a critical discussion on how to compute the diameter, why it is important and in what situations determines the nearest neighbor distance through packing considerations. | Session 18: Directed Assembly 2: Field Driven |
| 301 | Effect of Water Vapor on the Pair Potential Between Ligated Nanoparticles | Martinez, Michael; Jin, Miaochen; Smith, Alex; Slater, Kevin; Nowack, Linsey; Lin, Binhua; Rice, Stuart | We have carried out all-atom molecular dynamics simulations to illuminate the physical basis for the change in Young’s modulus of a monolayer of dodecane thiol ligated Au nanoparticles discovered by Wang et al.[1] For a water vapor concentration that would generate 80% monolayer coverage of the nanoparticle surface we find that water molecules form large fluctuating “hemispherical” clusters on the nanoparticle surface with the correct macroscopic contact angle. | Session 18: Directed Assembly 2: Field Driven |
| 302 | Ligand Structure and Free Energy of Nanoparticles on Substrates | Pham, Matthew; Travesset, Alex | Ligand Structure and Free Energy of Nanoparticles on Substrates | Session 18: Directed Assembly 2: Field Driven |
| 303 | Linking Melt Dynamics with Glass Topological Phases in GexPxSe100-2x Ternary | Welton, Aaron; Chbeir, Ralph; Chakravarty, Soumendu; Boolchand, Punit | We observe a reversibility window in the 9%<x<18% range fixing the three topological phases; flexible phase 0<x<9%, intermediate phase (IP) 9%<x<18% , stressed-rigid phase 18%<x<26%. | Session 19: Disordered and Glassy Systems |
| 304 | Local and Extended range molecular structures of (Na2O)x(P2O5)100-x glasses probed by Raman Scattering and Infrared reflectance | Gogi, Vamshi Kiran; Mandal, Avik; Mohanty, Chandi; Chbeir, Ralph; Boolchand, Punit | Local and Extended range molecular structures of (Na2O)x(P2O5)100-x glasses probed by Raman Scattering and Infrared reflectance | Session 19: Disordered and Glassy Systems |
| 305 | Molecular origin of the 7-folds narrowing of the Tg transition upon aging in Se-rich multicomponent glasses | Chbeir, Ralph; Dash, Shreeram; Boolchand, Punit | Molecular origin of the 7-folds narrowing of the Tg transition upon aging in Se-rich multicomponent glasses | Session 19: Disordered and Glassy Systems |
| 306 | Origin of the Raman active 490 cm-1 mode in binary As-S and Ge-S and ternary Ge-As-S glasses from compositional studies and Ab-initio Cluster calculations. | Chakravarty, Soumendu; Chbeir, Ralph; Almutairi, Badriah; Chakraborty, Shibalik; Jackson, Koblar; Boolchand, Punit | Origin of the Raman active 490 cm-1 mode in binary As-S and Ge-S and ternary Ge-As-S glasses from compositional studies and Ab-initio Cluster calculations. | Session 19: Disordered and Glassy Systems |
| 307 | Compositional variation of the Specific Heat Cp(x) in binary GexSe100-x melts and glasses across the Intermediate Phase. | Burger, Matthew; Chbeir, Ralph; Goodman, Bernard; Boolchand, Punit | The bulk glasses used in the present Modulated DSC study were the ones synthesized by Bhosle et al. 1. | Session 19: Disordered and Glassy Systems |
| 308 | Universal hidden order in amorphous cellular geometries | Schroeder-Turk, Gerd | Here we investigate the Quantizer problem, defined as the optimisation of the moment of inertia of Voronoi cells, i.e., similarly-sized ‘sphere-like’ polyhedra that tile space are preferred. | Session 19: Disordered and Glassy Systems |
| 309 | Bulk-Boundary Correspondence In Soft Matter : From Fractals to Order Parameter | Ramazanoglu, Mehmet; Özönder, Sener; Salci, Rumeysa | Instead of studying the bulk nature of LC+aerosil gels –like the classical works of x-ray scattering and heat capacity measurements- we chose to study the surface of these gels usinf atomic-force microscopy (AFM) techniques where we managed to correlate the surface related parameters with the ones of the bulk. | Session 19: Disordered and Glassy Systems |
| 310 | Micro-phase separation breaks hyperuniformity of jammed solids | Xu, Ding; Liao, Qinyi; Xu, Ning | To clarify the picture, we numerically study polydisperse jammed states in two dimensions by quickly compressing supercooled hard disk liquids from different densities and by quickly quenching high temperature states of soft particles with repulsions. | Session 19: Disordered and Glassy Systems |
| 311 | The role of hydrodynamic interactions on the long-time structural fate of dense colloidal suspensions | Zakhari, Monica E. A.; Wang, Jialun; Ouaknin, Gaddiel; Zia, Roseanna | In this work, we study the mechanics of this competition by considering both the equilibrium and non-equilibrium solidification processes, i.e. crystallization and vitrification, respectively, utilizing large-scale Stokesian dynamic simulations that are massively parallelized. | Session 19: Disordered and Glassy Systems |
| 312 | Why phonon scattering in glasses is universally small at low temperatures | Carruzzo, Herve; Yu, Clare | We present a novel view of the standard model of tunneling two level systems (TLS) to explain the puzzling universal value of a quantity, C ~ 3 x 10 -4, that characterizes phonon scattering in glasses below 1 K as reflected in thermal conductivity, ultrasonic attenuation, internal friction, and the change in sound velocity. | Session 19: Disordered and Glassy Systems |
| 313 | Nearest Neighbor Functions for Stealthy Hyperuniform Many-particle Ground States | Middlemas, Timothy; Torquato, Salvatore | We present new analytical theories backed by simulation for the nearest neighbor functions of disordered stealthy hyperuniform many-particle ground states. | Session 19: Disordered and Glassy Systems |
| 314 | Analytical theory of enhanced logarithmic Rayleigh scattering in amorphous solids | Cui, Bingyu; Zaccone, Alessio | Analytical theory of enhanced logarithmic Rayleigh scattering in amorphous solids | Session 19: Disordered and Glassy Systems |
| 315 | Tracer Transport in Attractive and Repulsive Supercooled Liquids and Glasses | Roberts, Ryan; Conrad, Jacinta; Palmer, Jeremy | We use event-driven molecular dynamics to investigate the transport of small, hard-sphere tracers in matrices of square-well particles. | Session 19: Disordered and Glassy Systems |
| 316 | Glass Transition in Supercooled Liquids with Medium-Range Crystalline Order | Tah, Indrajit; Sengupta, Shiladitya; Dasgupta, Chandan; Sastry, Srikanth; Karmakar, Smarajit | In this study we perform extensive molecular dynamics simulations of a number of glass forming liquids and show that the static and dynamic properties of glasses with MRCO are different from those of other glass forming liquids with no predominant local order. | Session 19: Disordered and Glassy Systems |
| 317 | Understanding how the degree of disorder affects structural colors of colloidal packings | Xiao, Ming; Stephenson, Anna; Hwang, Victoria; Manoharan, Vinothan | We investigate the scattering from dense packings of spherical colloidal particles in a weak multiple scattering region. | Session 19: Disordered and Glassy Systems |
| 318 | Microfluidics platform for generation of microparticles and capsules through Electrohydrodynamics | Eqbal, Danish; Gundabala, Venkat | In this work we present a microfluidics based implementation of electrohydrodynamics for generation microparticles and capsules. | Session 20: Drop |
| 319 | Numerical Modeling of In-Situ Curing of a Photopolymerizing and Spreading Drop with Applications in 3D-Printing | Das, Siddhartha; Sivasankar, Vishal; Sachar, Harnoor; Sinha, Shayandev; Hines, Daniel | In this study, we investigate the spreading behavior of a polymer drop in conditions similar to that of the Aerosol Jet Printing (AJP) process. | Session 20: Drop |
| 320 | A Comparative Study of the Pattern Formation in the Drying Protein Droplets suspended in the De-ionized water | Pal, Anusuya; Iannacchione, Germano | A Comparative Study of the Pattern Formation in the Drying Protein Droplets suspended in the De-ionized water | Session 20: Drop |
| 321 | Flow of Emulsions with Insoluble Surfactant through Porous Media | Gissinger, Jacob; Zinchenko, Alexander; Davis, Robert | A pressure-driven, concentrated emulsion flowing through a packed bed of spheres is modeled using a three-dimensional boundary-integral algorithm. | Session 20: Drop |
| 322 | Surface roughness control of water-air dynamic contact angle hysteresis on metal substrates | Machado de Oliveira, Marina; Murphy, Joseph; Ackerman, John; Rice, WIlliam; Alvarado, Vladimir | In this work, we focus on water-air contact angle hysteresis on metal substrates of interest, e.g. aluminum, using a pendant-drop system over a frequency range 0.1-10 Hz. | Session 20: Drop |
| 323 | Modeling of hydrophobic particle capture by expanding droplets | Roure, Gesse; Davis, Robert | The method of froth flotation by small air bubbles has been traditionally used in industry to capture fine minerals and other hydrophobic particles. | Session 20: Drop |
| 324 | Experiments in liquid-spray physics | Lapham, Gary; McHugh, John | Experiments in liquid-spray physics | Session 20: Drop |
| 325 | The Cheerios Effect under a thin elastic film | Lee, Carmen; Buller, Abigail; Dalnoki-Veress, Kari | We examine the effect of the thin film on the equilibrium position of the bubble as well as the attractive force between the two bubbles and present a theoretical model. | Session 20: Drop |
| 326 | Stability limit of electrified droplets and bubbles | Beroz, Justin; Hart, John; Bush, John | In this talk, we demonstrate, experimentally and theoretically, that the stability limit of a conducting droplet exposed to an external electric field is described by a power law with broad generality that applies to the cases in which the droplet is pinned or sliding on a conducting surface or free floating. | Session 20: Drop |
| 327 | Superpropulsion of liquid droplets in sharpshooter insects | Challita, Elio; Acharya, Raghav; Krugner, Rodrigo; Bhamla, Saad | Unlike the take-off speed of a rigid projectile that is set by maximum speed of the launching spring, we find that the elastic liquid droplets in sharpshooters can achieve take-off velocities that are up 3X faster than the underlying spring. | Session 20: Drop |
| 328 | Intricate instabilities in drying drops | Arora, Srishti; Driscoll, Michelle | Here, we present a study of the drying of a high-volume fraction suspension drop. | Session 21: Drops |
| 329 | Droplet traffic in microfluidic networks: Role of droplet collisions and occlusion | Norouzi Darabad, Masoud; Vanapalli, Siva; Vaughn, Mark | We study droplet decision rules by use of droplet trajectories and distribution of the droplets in the junction and throughout the network. | Session 21: Drops |
| 330 | Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets | Kolegov, Konstantin; Barash, Lev | A simplified model is developed, which allows us to perform computer simulations of the particles transport in an evaporating droplet with a contact line pinned to a hydrophilic substrate. | Session 21: Drops |
| 331 | Dynamics and stability of confined levitating droplets | Thomson, Stuart; Durey, Matthew; Bush, John; Rosales, Ruben | When confined to an annular ring, we show that single droplets are observed to exhibit a random walk like behaviour, while the collective dynamics of one-dimensional droplet lattices exhibit canonical features of driven dissipative oscillator systems, namely out-of-phase oscillations and solitary wave propagation. | Session 21: Drops |
| 332 | Watching Droplets Dry in Wet and Dry Climates | Lilin, Paul; Bourrianne, Philippe; Bischofberger, Irmgard | We discuss the relation between these changes in structure and kinetics and the deposit thickness. | Session 21: Drops |
| 333 | How air deforms the free surface just before disk impact on a liquid bath | Van Der Meer, Devaraj; Jain, Utkarsh; Gauthier, Anaïs; Lohse, Detlef | We show that, whereas the manner in which the surface below the center of the disk is pushed down is consistent with potential theory, this is not the case for the elevation of the free surface below the disk’s edge. | Session 21: Drops |
| 334 | Dispersion of magnetic beads in flowing droplets. | Brouzes, Eric; Lammertse, Evan | We have demonstrated a proof-of-principle of magnetic purification from flowing droplets using an external magnetic field to partition beads within droplets before asymmetric splitting. | Session 21: Drops |
| 335 | Computational modeling of droplet spreading and coalescence on fiber rails | Wang, Fang; Schiller, Ulf | In this talk, we will present lattice Boltzmann simulations of droplet spreading on fiber rails. | Session 21: Drops |
| 336 | Spreading and evaporation of sessile droplets | Lindeman, Chloe; Schade, Nicholas; Nagel, Sidney | Spreading and evaporation of sessile droplets | Session 21: Drops |
| 337 | Electric Discharge Mediated Transient Interfacial Dynamics of a Sessile Liquid Droplet: Plethora of Hydrodynamic Features | Sarma, Bhaskarjyoti; Kumar, Sunny; Dalal, Amaresh; Basu, Dipankar; Bandyopadhyay, Dipankar | We experimentally demonstrate a plethora of hydrodynamic features namely jetting, crowning, and bursting, engendered from capturing electrical discharge inside a sessile liquid droplet. | Session 21: Drops |
| 338 | High density ratio Lattice Boltzmann simulations of immiscible drop collision | Bala, Neeru; Kusumaatmaja, Halim; Semprebon, Ciro | In this contribution, I will present a numerical investigation of the collision between two immiscible droplets by employing a high density ratio (~10 3) Free energy Lattice Boltzmann model, which account for the Inertial effects [1]. | Session 21: Drops |
| 339 | Mobility Gradient of Polymer Chains near a Solid Interface | Tanaka, Keiji; Nguyen, Hung; Kawaguchi, Daisuke | We found the presence of the dynamics gradient of chains in the interfacial region with the quartz surface. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 340 | Direct observation of mobility of thin polymer layers via asymmetric interdiffusion using neutron reflectivity measurements | Fukao, Koji; Ooe, Megumi; Miyata, Kairi; Yoshioka, Jun; Yamada, Norifumi L. | In this study, we investigated the diffusion dynamics at the interface between deuterated poly(methyl methacrylate) (d-PMMA) and protonated PMMA (h-PMMA) in two-layered thin films of d- and h-PMMA layers via neutron reflectivity (NR) measurements during annealing above the glass transition temperature Tg. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 341 | Reconciling Computational and Experimental Trends in the Temperature Dependence of Interfacial Mobility in Polymer Films | Douglas, Jack; Zhang, Wengang; Starr, Francis | To better understand these contradictory trends, we performed MD simulations over a T range over which our simulated polymer films enters a glassy state, and found that the relaxation time τα within the film interior, relative to the polymer-air interfacial region, exhibits a maximum near the observed computational glass transition temperature, Tg ,c, reconciling previous measurements and simulations of supported polymer films in their glass and liquid states. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 342 | Ellipsometry Modeling with Gradient in Refractive Index Resolves Unrealistic Density Increases in Thin Polymer Films and Demonstrates Inhomogeneous Film Structure Decoupled from Dynamics | Han, Yixuan; Roth, Connie | We show polystyrene (PS), poly(methyl methacrylate) (PMMA), and poly(2-vinylpyridine) (P2VP) all exhibit similar large increases in refractive index with decreasing film thickness for ellipsometry data modeled by a homogeneous Cauchy layer. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 343 | Density Measurements of Thin Polymeric Films using Magnetic Levitation | Root, Samuel; Gao, Rui; Ge, Shencheng; Whitesides, George | Using the principle of magnetic levitation, we construct a simple metrology for directly measuring the mass density of polymeric films down to 3 nm thick–an important quantity for understanding the glassy dynamics of such films. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 344 | Polymeric Liquid Layer Densified by Surface Acoustic Wave | Hou, Tianhao; Yang, Jingfa; Wang, Wen; Zhao, Jiang | Polymeric Liquid Layer Densified by Surface Acoustic Wave | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 345 | Investigating molecular origins of mechanical stress during deformation of polymer glasses: in-situ birefringence measurements | HUANG, DA; Razavi, Masoud; Wang, Shiqing | By comparing the stress-optical behavior among PS, PMMA and bisphenol A PC where the optical anisotropy arises from either side group (PS) or backbone (PMMA and PC), we can learn about the intermolecular and intramolecular contributions to mechanical stress and obtain more insights into the stress-optical relationship identified in the mechanical deformation of these glassy polymers. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 346 | Light-facilitated dewetting in amorphous selenium thin films | Zhang, Aixi; Rodriguez, Danixa; Stephens, Richard; Fakhraai, Zahra | Here, we study dewetting and glass transition temperature (T g) of amorphous selenium (a-Se) thin films. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 347 | Geometry-Dictated Wrinkle Patterns in Vapor-Deposited Thin Films on Liquid Substrates | Enright, Robert; Bradley, Laura | This presentation will demonstrate control of the wrinkle patterns and elucidate the mechanism of wrinkle formation in thin films grown on liquid surfaces. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 348 | In situ Molecular Aggregation Structure Analyses on Glassy Polymers during Mechanical Deformation | Kojio, Ken; Fujimoto, Aya; Kajiwara, Tomoko; Cheng, Chao-Hung; Masuda, Shiori; Dechnarong, Nattanee; Fukada, Kento; Kamitani, Kazutaka; Takahara, Atsushi | In situ Molecular Aggregation Structure Analyses on Glassy Polymers during Mechanical Deformation | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 349 | Measuring dynamic mechanical properties of thin polymer films | Guo, Yunlong; Bai, Pei | We utilize a sinusoidal pressure wave on a polymer film to induce vibration, and the response of the material is record by a high-speed digital camera. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 350 | An explanation of how nanoconfinement affects the control of local dynamic relaxation | Lipson, Jane E; White, Ronald | In this talk these CFV features will be illustrated through extensive connection with experimental data on a variety of systems. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 351 | Is there a general compensation rule governing the relaxation dynamics of polymeric surface patterns? | Bhadauriya, Sonal; Stafford, Christopher; Douglas, Jack; Karim, Alamgir | Herein, we present the relaxation behaviour of nanoparticle-brush filled imprinted and wrinkled polymer films showing similar compensation effect. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 352 | A simulation study on nonlinear mechanical responses of glassy polymer nanofibers | Kwon, Taejin; Sung, Bong June | We perform molecular dynamics simulations and study nonlinear mechanical responses of glassy polymer nanofibers under uniaxial deformation. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 353 | Gradient overlap effects in the thin films | Ghanekarade, Asieh; Simmons, David | We report on distinct behaviors in these regimes in terms of the form of the gradients, the presence or absence of a bulk-like domain, and the breadth of the overall film glass transition. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 354 | Dynamical gradients, barrier factorization and interface coupling in thick and thin films of glass-forming liquids | Schweizer, Kenneth; Phan, Anh | We have developed a microscopic theory for the spatially heterogeneous dynamics of glassy polymer liquids near a vapor interface. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 355 | Thickness dependence of surface glass transition temperature of polymer supported films | YAN, Jinsong; XU, Jianquan; Weng, Lu-tao; Tsui, Ophelia | We found that T g surf decreases with decreases h and is ~20 K lower than the glass transition temperature (T g) of the film for any given h. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 356 | Dynamical phase transitions in amorphous thin films | Ivancic, Robert; Riggleman, Robert | Here, we provide evidence that this transition is due to the films inability to support an inactive, low-mobility, dynamic phase near a free surface. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 357 | Modeling the Glass Transition in Polymers using a Mean-Field “TS2” Model: Bulk and Thin Films | Ginzburg, Valeriy | A phenomenological model is proposed to describe the equilibrium dynamic behavior of amorphous, glass-forming polymers. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 358 | Tuning the Effective Viscosity of Random Copolymer films of Styrene and 4-Methoxystyrene by Varying the Copolymer Composition | XU, Jianquan; LV, Chao; DU, binyang; Tsui, Ophelia | We show that thickness dependence of effective viscosity, η eff( h 0), of random copolymer films of styrene (St) and 4-methoxystyrene (MeOS) supported by silica (SiOx) can be easily tuned by using different MeOS concentrations, X MeOS. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 359 | The Glass Transition Behavior and Structural Recovery of 2D Stacked Polystyrene Nanorods | Pallaka, Madhusudhan Reddy; Simon, Sindee | The Glass Transition Behavior and Structural Recovery of 2D Stacked Polystyrene Nanorods | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 360 | The Importance of Density in Segmental Dynamics: Applications of the Cooperative Free Volume Rate Model and Connections with the Density Scaling Approach | White, Ronald; Lipson, Jane E | In this talk we discuss our recent work in modeling and predicting alpha relaxation times, τ( T, V), using the cooperative free volume rate model (CFV), in which the system’s (well-defined and thermodynamically quantified) free volume controls the molecular cooperativity, and thus the activation energy. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 361 | A Novel Technique for the Characterization of Freestanding Ultrathin Film Mechanics | Galuska, Luke; Zhang, Song; Muckley, Eric; Ehlenberg, Dakota; Ivanov, Ilia; Gu, Xiaodan | Here, we developed a novel truly free-standing (in air) tensile platform to study sub-100 nm thick films. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 362 | Chains entanglements and flow within the mobile surface layers of glassy polymers | Zuo, Biao; Hao, Zhiwei; Wang, Xinping; Priestley, Rodney | We proposed a 2D entanglement and limited flow to explain the phenomena. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 363 | Entanglement Effect on Mechanical Properties of Ultrathin Glassy Polymer Films | Bukowski, Cynthia; Crosby, Alfred | To provide more insight into how entanglements control the failure mechanisms of glassy polymers, especially in ultrathin films, we introduce polymer chains shorter than the entanglement molecular weight to control the entanglement density by effectively swelling the entanglement network. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 364 | Effect of Confinement on Modulus and Fracture of Thin Conjugated Polymer Films For Organic Electronics | Gu, Xiaodan; Zhou, Dongshan; Rondeau-Gagné, Simon | In this talk, I will discuss our research on understanding the glass transition phenomena and thin-film mechanical property for those rigid conjugated polymers. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 365 | Mechanical Relaxations of Free-standing Polymer Films | YUAN, Hailin; Tsui, Ophelia | We found that t s is similar to the fast relaxation time observed in previous optical anisotropy relaxation experiment. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 366 | Effects of Nanoparticles Motion on a Bound Layer in Strongly Attractive Polymer Nanocomposites | Emamy, Hamed; Starr, Francis; Kumar, Sanat | Here, we perform molecular dynamics simulations for polymer composites, where the NP can move in the polymer matrix. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 367 | Growth of Irreversibly Adsorbed Layers and Corresponding Local Tg Perturbances in Polymer Nanocomposites | Randazzo, Katelyn; Zuo, Biao; Priestley, Rodney | Herein, we describe the local effects of irreversible adsorption in polystyrene-silica nanocomposites. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 368 | Comparison of Solution Grown and Film Washed Adsorbed Layers and Their Corresponding Impact on Film Dynamics | Roth, Connie; Thees, Michael; McGuire, Jennifer; Huang, Xinru | By directly comparing solution grown adsorbed layers with those formed by solvent washing melt films, we leverage the wealth of information on polymer adsorption in solution developed over several decades to inform us about polymer conformations in the melt. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 369 | Property enhancements and dynamic gradients in P2VP-silica nanocomopsites | Wei, Tong; Torkelson, John | A fluorescence technique is used to probe the glass transition temperature ( T g) associated with α-relaxation dynamics at different locations in poly(2-vinylprydine) (P2VP)-silica nanocomposites. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 370 | Polymer conformations and dynamics in polymer nanoparticle composite with high nanoparticle loading | Lin, Emily; Riggleman, Robert | The goal of this work is to understand how confining polymers to the cavities of a random close packed nanoparticle solid affects polymer conformations and dynamics from the segmental to the chain scale. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 371 | Direct probing of the fracture behavior for pseudo-free-standing polymeric ultra-thin films | Zhang, Song; Koizumi, Masato; Jin, Lihua; Gu, Xiaodan | In this work, we reported a new testing methodology that not only can directly measure the fracture energy of ultra-thin films floated on the water, but also visualize the local stress field during the deformation through the wrinkling pattern of the film. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 372 | Glassy, Conjugated Polymer Nanoparticles Formed by a Semiflexible Polymer: A Molecular Dynamic Study | Kamkanam Mohottalalage, Supun Samindra; Grest, Gary; Perahia, Dvora | We find that the polymer swells below T g and R g increases linearly with temperature. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 373 | On the stability of initiators for surface-initiated controlled radical polymerization | Pester, Christian | We present findings regarding the long-term stability of the surface-grafted initiating sites and discuss reproducibility of SI-PET-RAFT and other polymerization techniques. | Session 22: Dynamics of Glassy Polymers Under Nanoscale Confinement |
| 374 | Control and characterization of thin film formation by electrospray deposition techniques | Toth, Kristof; Doerk, Gregory; Yager, Kevin; Osuji, Chinedum | We describe a simple feedback control for visual analysis of various electrospray modes and their corresponding film formation. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 375 | Morphological Control of Multifunctional Melting Gel Coatings via Electrospray Deposition | Gamboa, Arielle Marie; Lei, Lin; Mercado, James; Guzman, Jennifer; Klein, Lisa; Jitianu, Andrei; Singer, Jonathan | Morphological Control of Multifunctional Melting Gel Coatings via Electrospray Deposition | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 376 | Using Multiplexed Electrosprays to Manipulate Fluids and (Soft) Materials | Gomez, Alessandro | Using fluid mechanics and electrostatics, we a) developed criteria for compact multiplexing to increase flow rate drastically, b) microfabricated systems with high packing densities (1.1 104 sources/cm2), reducing the cost per electrospray source, and c) demonstrated successful operation of these devices in the synthesis of (soft) materials (e.g., polymer nanoparticles of controlled shape for drug delivery and battery materials) and in microchip cooling. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 377 | Self-Limiting Electrospray Deposition for the Surface Modification of Additively Manufactured Parts | Kovacevich, Dylan; Lei, Lin; Han, Daehoon; Kuznetsova, Christianna; Kooi, Steven; Lee, Howon; Singer, Jonathan | Having demonstrated three-dimensional coating with film thickness in the range of 1-50 µm on a variety of conductive objects, in this study we employed model substrates and finite element method simulations to quantitatively study the technique’s limits with regard to geometry and scale. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 378 | The Role of Surface Charging in Electrospray Printing of Thin Films | Zhu, Yaqun; Chiarot, Paul | We report on the use of electrospray printing to create thin continuous multiscale films from nanoparticle aggregates. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 379 | Effect of Processing Conditions on the Formation and Microstructure of Electrospray Printed Polymer Films | Kingsley, Bryce; Chiarot, Paul | We report on the use of electrospray to print thin films of polytetrafluoroethylene (PTFE) on silicon substrates. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 380 | Electrospray deposition of nanowire forests through spinodal gellation | Lei, Lin; Nachtigal, Catherine; Chen, Shensheng; Moy, Tyler; Yong, Xin; Singer, Jonathan | Such a morphology has yet to be observed experimentally, which we propose is the result of spatially-varying viscosity in sprayed droplets. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 381 | Modelling Nanowire Formation in Electrospray Deposition of Polymeric Droplets | Chen, Shensheng; Yong, Xin | We conducted computer simulations to uncover the physics underpinning the morphological evolution of a highly charged polymeric droplets in ESD. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 382 | Influence of ionic conductivity on unconfined melt electrospinning of thermoplastics | Sheoran, Neelam; Boland, Brenton; Shabani, Elnaz; Gorga, Russell; Bochinski, Jason; Clarke, Laura | I will report ionic conductivity measurements obtained using broad-band impedance spectroscopy for two different grades of commercial linear low-density polyethylene with varying viscosities as a function of melt temperature and additive concentration. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 383 | Unconfined melt electrospinning from molten polymer experiencing an electric discharge to manipulate ion density and ionic conductivity | Boland, Brenton; Sheoran, Neelam; Clarke, Laura; Bochinski, Jason | We utilize an unconfined geometry where jets spontaneously form and organize on the edge of a melt-covered plate under the influence of the applied electrospinning electric field. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 384 | Liquid Selection for Electrohydrodynamic Capillary Thermal Switches | Ma, Tianxing; Dsouza, Darrel; Ryerson, Kyrsten McKenzie; Signorelli, Matthew; Zhao, Yang; Osuji, Chinedum; Singer, Jonathan | The deformation of sessile droplets and capillary bridging in a parallel-plate capacitor under DC field has been the subject of several scientific studies. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 385 | Dielectric modulation of two-dimensional dipolar materials | Wang, Ziwei; Luijten, Erik | We demonstrate that in dipolar films, a prototypical system for pattern formation, patterns can be induced by dielectric effects alone [1]. | Session 23: Electrostatic Manipulation of Fluids and Soft Matter: Electrohydrodynamics |
| 386 | Precision measurement of tribocharging in acoustically levitated sub-millimeter grains | Kline, Adam; Lim, Melody; Jaeger, Heinrich | In this talk, we present a new experimental method [1], extending a prior approach [2] based on acoustic levitation, which allows us to controllably and repeatedly collide two sub-millimeter grains head-on and measure the evolution of their electric charges. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 387 | Tuning friction and slip at solid-nanoparticle suspension interfaces by electric fields. | Seed, Caitlin; Acharya, Biplav; Brenner, Donald; Smirnov, Alex; Krim, Jacqueline | We report an experimental Quartz Crystal Microbalance (QCM) study of tuning interfacial friction and slip lengths for aqueous suspensions of ceramic (Al 2O 3, TiO 2 and SiO 2) nanoparticles on planar platinum surfaces by external electric fields. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 388 | Particle assembly using confined electro-hydrodynamics: Driven versus active assembly | Fossum, Jon Otto; Dommersnes, Paul | We give examples of driven colloidal shell assembly on drop interfaces by application of DC-electrohydrodynamics and dielectrophoresis, using standard leaky dielectric carrier fluids for non-polarisable and/or polarizable colloids. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 389 | Electrostatic patterns from peeling tape | Reiter, Mary; VanDusen-Gross, Matthew; Shinbrot, Troy | In this talk, we discuss new and surprising aspects of triboelectric charging associated with tape peeling including entirely different charge patterns on formerly adjoining surfaces. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 390 | Sublattice Melting in Binary Superionic Colloidal Crystals | Lin, Yange; Olvera De La Cruz, Monica | Sublattice Melting in Binary Superionic Colloidal Crystals | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 391 | Band-collision gel electrophoresis (BCGE) for visualizing molecular and colloidal interactions | Bikos, Dimitri; Mason, Thomas | Band-collision gel electrophoresis (BCGE) for visualizing molecular and colloidal interactions | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 392 | Controlling surfactant self-assembly in dodecane via applied potential | Vuorte, Maisa; Lokka, Aapo; Sammalkorpi, Maria | Here, we present a molecular modelling study of the aggregation of dioctyl sodium sulfosuccinate (AOT) surfactant in apolar dodecane solvent under applied potential. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 393 | Dumbbell model for the simulation of polyelectrolytes in combination of flow and electric fields | Setaro, Angelo; Underhill, Patrick | To gain insight to the underlying phenomena, we used a combination of theoretical calculations and Brownian Dynamics simulations in order to understand the mechanism of migration and why it results in a non-monotonic trend. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 394 | Electrostatically Stabilized Microphase Separation in Polyelectrolyte Blends: Analogy to Nuclear "Pasta" Phases | Rumyantsev, Artem; De Pablo, Juan | We develop the weak segregation theory of microphase separation in stoichiometric blends of oppositely and weakly charged polyelectrolytes, which would be immiscible in the absence of charged units. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 395 | Determination of diffusion constant of antimicrobial peptide nisin interacting with Langmuir monolayers of DPPC and DPPG molecules | Pasha, Imran; Kumar, Bharat | We present a method of determining the diffusion constant of peptides interacting with lipid films. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 396 | Capture and Translocation of a Rod-like dsDNA by a Nanopore:~A Lattice Boltzmann Simulation Study | Qiao, Le; Holm, Christian; Szuttor, Kai; Slater, Gary | In this talk, we investigate this problem further using a coarse-grained (CG) model of a charged double-stranded DNA where the hydrodynamic interactions are added by coupling the CG DNA with a lattice-Boltzmann fluid via a raspberry approach. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 397 | Nontrivial effects of dielectric mismatch on the conformational behavior of confined polyelectrolytes | Nguyen, Trung; Olvera De La Cruz, Monica | We investigate the conformational behavior of a highly charged polyelectrolyte confined in a spherical cavity where the media inside and outside the cavity have different dielectric constants. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 398 | Interaction of highly charged rigid polymer in monovalent salt | Li, Yaohua; Jimenez-Angeles, Felipe; Olvera De La Cruz, Monica | Using an empirical ion potential that reproduces pair correlations from all atom molecular dynamics (MD) simulations, we study ion distributions and DNA-DNA interactions by coarse-grained MD simulations with explicit salt ions. | Session 24: Electrostatic Manipulation of Fluids and Soft Matter: Self-Assembly |
| 399 | Dynamics and self-organization of active surfaces | Julicher, Frank | I will present a minimal model of the mechano-chemical self-organization of the cell cortex that is based on a hydrodynamic theory of curved active surfaces and that can capture the emergence of shapes. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 400 | Microtubule Motility on Fixed and Diffusive Motor Proteins | Memarian, Fereshteh; Lopes, Joseph; Hirst, Linda | Here we investigate motor-based transportation and behavior of MTs. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 401 | Modeling of the collective motion of microtubules with mobile kinesin motors. | Athani, Madhuvanthi; Memarian, Fereshteh; Hirst, Linda; Beller, Daniel | We use Brownian Dynamics simulations to model the collective motions of microtubules with explicit consideration of the concentration of the motors. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 402 | Multi-functional crystalline frameworks self-assembled from amphiphilic DNA nanostructures. | Brady, Ryan; Brooks, Nicholas; Cicuta, Pietro; Di Michele, Lorenzo | I will discuss a novel class of amphiphilic DNA building blocks dubbed “C-stars” that combine Watson-Crick base pairing and hydrophobic forces to self-assemble into 3D single crystals [1-3]. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 403 | Controlled membrane remodeling by DNA origami nanorods: Experiments targeting the design principles for membrane-based materials | Zuraw, Sarah; Dinsmore, Anthony; Siavashpouri, Mahsa; Dogic, Zvonimir; Gerling, Thomas; Dietz, Hendrik | Inspired by this system, we use DNA origami nanorods to illuminate the role of particle shape and adhesion on membrane reconfiguration. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 404 | A coarse-grained model for lipid bilayer formation, fusion, and its hydrodynamics | Young, Yuan-nan; Fu, Szu-Pei; Ryham, Rolf | In this paper a theoretical model for long-range, hydrophobic attraction between amphiphilic particles is developed to quantify the macroscopic assembly and mechanics of a lipid bilayer membrane in solvents. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 405 | Phase separation and domain registry in giant multilamellar vesicles prepared with biologically-relevant lipid compositions. | Steer, Dylan; Leal, Cecilia | Here we report on the macroscopic arrangement of phase-separated domains in multilamellar forms with biologically-relevant compositions. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 406 | Clustering dynamics of collectively migrating malignant lymphocytes | Golnaraghi, Farnaz; Quint, David; Gov, Nir; Gopinathan, Ajay | We aim to quantify cell cluster shape dynamics and chemotactic efficiency as a function of cellular parameters such as, cell-cell adhesion and alignment, contact inhibition and chemotactic response. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 407 | Imaging the emergence of bacterial turbulence using light-powered E. coli | Peng, Yi; Liu, Zhengyang; Cheng, Xiang | We investigate the emergence of the collective motion of Escherichia coli suspensions and explore the kinetic pathway towards bacterial turbulence. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 408 | Activity-induced phase transitions in confined bacterial suspensions | Ghosh, Dipanjan; Liu, Zhengyang; Cheng, Xiang | Here, we study the emergence of collective order in confined suspensions of genetically engineered Escherichia coli, whose propulsion speed can be controlled via intensity of light. Our study provides an experimental benchmark for understanding the role of complex interplays between hydrodynamic and steric interactions responsible for the emergence of ordered phases in confined active systems. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 409 | Comparing sperm collective swimming with flocking transition | Oduor, Allan; Bililign, Yishak; Sussman, Daniel; Cheong, Soon Hon; Suarez, Susan; Manning, M. Lisa; Tung, Chih-Kuan | Analyzing these flocks, we found the decay of the orientation correlation function to be linear on a log-log plot. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 410 | Correlations in suspensions of microswimmers | Morozov, Alexander | Here, we present a novel kinetic theory that predicts the existence of strong correlations even below the transition to collective motion. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 411 | Collective migration of bacteria in disordered media | Bhattacharjee, Tapomoy; Amchin, Daniel; Kratz, Felix; Ott, Jenna; Datta, Sujit | Here, we use direct visualization and 3D bioprinting to investigate how this behavior manifests in multicellular communities in porous media. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 412 | Collective behavior of platelets in blood clotting | Sun, Yueyi; Myers, David; Lam, Wilbur; Alexeev, Alexander | With experimental insights, we develop a mesoscale computational approach based on dissipative particle dynamics to examine the biophysics of clot contraction. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 413 | Living oil-water interfaces: Buckling of droplets by cell growth at finite liquid interfaces | Juarez, Gabriel | Here, through microfluidic experiments and time-lapse microscopy, we demonstrate that the colonization of oil droplets by the growth and division of rod-shaped bacteria depends strongly on the droplet diameter, or the interfacial curvature. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 414 | A trace amount of surfactants enable diffusiophoretic swimming of bacteria | Doan, Viet Sang; Saingam, Prakit; Yan, Tao; Shin, Sangwoo | We show that even a trace amount of ionic surfactants, down to a single ppm level, can impact the bacteria diffusiophoresis by boosting the surface charge of the cells. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 415 | Bridging Scales to Model Emergent Collective Oscillations in Social Amoeba | Huyan, Chuqiao; Golden, Alexander; Zhu, Xinwen; Mehta, Pankaj; Sgro, Allyson | We compared each model to published experimental findings about how amoeba cells modulate internal cAMP dynamics in response to external changes in cAMP. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 416 | Pattern engineering of living bacterial colonies using meniscus-driven fluidic channels | Kantsler, Vasily; Ontañón-McDonald, Elena; Kuey, Cansu; Ghanshyam, Manjari J; Roffin, Maria; Asally, Munehiro | Here we present controlled meniscus-driven fluidics, MeniFluidics; an easily implementable technique for patterning living bacterial populations. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 417 | Control of patterning in human pluripotent stem cell colonies via a Turing system with reactive boundaries | McMaster, Benjamin; Kaul, Himanshu; Aguilar-Hidalgo, Daniel; Zandstra, Peter | This work presents a general framework for self-organized pattern formation that explain observed patterns in hPSC colonies, leading to a design-based specification of collective cell behavior. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 418 | Cellular integration of physical and biochemical damage signals in the generation of tissue-level wound responses | Stevens, Aaron; Tasneem, Kazi; OConnor, James; Hutson, Shane; Page-McCaw, Andrea | We have developed a computational model to test the plausibility of multiple hypothesized mechanisms driving these calcium signals and to further understand the underlying biology. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 419 | Dorsal closure in numbers: quantification of epithelial cell oscillations using machine learning | Haertter, Daniel; Rhodes, Dante; Crawford, Janice; Kiehart, Daniel; Schmidt, Christoph | We present a novel analysis pipeline, based on a convolutional neural network (machine learning), that allows an automated and robust segmentation of large numbers of video recordings. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 420 | Signatures of tissue surface tension in 3D models with two tissue types | Sahu, Preeti; Schwarz, J; Manning, M. Lisa | To better understand the mechanisms for such sharp compartmentalization, we study the effect of an imposed heterotypic tension at the interface between two distinct cell types in a fully 3D model for confluent tissues. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 421 | Defect Driven Morphogenesis: Active Cell Division Generates Four-Fold Order | Cislo, Dillon; Qin, Haodong; Bowick, Mark; Streichan, Sebastian | We present a quantitative profile of exotic non-equilibrium pattern formation in the crustacean Parhyale hawaiensis. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 422 | Quantifying mechanics in non-confluent tissues using an extended vertex model | Lawson-Keister, Elizabeth; Parker, Amanda; Schwarz, Jennifer; Manning, M. Lisa | Vertex models for tissues have correctly predicted cell shapes and fluid-solid transitions in confluent epithelial monolayers where there are no gaps between cells and negligible curvature along cell-cell boundaries. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 423 | The branched architecture of the airway is physically shaped by the extracellular matrix and contractile airway smooth muscle during lung development | Spurlin, James; Zhang, Rawlison; Nelson, Celeste | Using comparative embryology, we have found several novel mechanisms of how airway branches are physically shaped. | Session 25: Emergent Collective Dynamics in Biology: from Microbes to Organs |
| 424 | Transmisison hysteresis and edge modes in bounded space-time composites | Nassar, Hussein | Specifically, we establish in the weak coupling regime how the hybridization of total bandgaps into pairs of one-way bandgaps triggers nonreciprocal hysteresis transmission loops in the space-frequency domain and alters, qualitatively and quantitatively, the vibrational frequency response in the presence of reflecting boundaries. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 425 | Motion via Bistability in Viscous Fluids | Zanaty, Mohamed; Zunker, William; Mueller, Jochen; Bertoldi, Katia | We study the behavior of bistable beams in viscous media and their application to aquatic locomotion. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 426 | Non-reciprocal solitons in robotic materials | Brandenbourger, Martin; Dekker, Hans; Coulais, Corentin | Here, we use this new platform to generate soliton waves that indefinitely propagate in only one direction. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 427 | Topological locomotion | Bertoldi, Katia; Deng, Bolei; Zanaty, Mohamed | We investigate how the propagation of the topological domain walls through a metamaterial based on the squares rotating mechanism can be harnessed to generate locomotion. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 428 | Topology by activity in non-Hermitian mechanical metamaterials | Scheibner, Colin; Irvine, William; Vitelli, Vincenzo | Our work sheds light on non-Hermitian band theory and the design of active metamaterials that conserve linear momentum. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 429 | The topology of nonlinear mechanical systems | Lo, Po-Wei; Lawler, Michael; Santangelo, Christian; Chen, Bryan; Roychowdhury, Krishanu; Jian, Chao-Ming | We, in the present work, attempt an extension to accommodate nonlinear effects that are more natural to occur in realistic mechanical systems and feature topologically protected zero modes. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 430 | Mechanical metamaterial inspired by biological tissues | Li, Xinzhi; Bi, Dapeng | We introduce an amorphous mechanical metamaterial inspired by how cells pack in biological tissues. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 431 | Modeling tunable acoustic transport in driven graphene nanoresonator arrays | Karki, Pragalv; Miller, David; Blaikie, Andrew; Carter, Brittany; Aleman, Benjamin; Paulose, Jayson | Motivated by experiments, we present a theoretical and computational study of the acoustic properties of coupled graphene resonators with dynamical spatiotemporal modulation of the tension. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 432 | Transitions from conservative to non-conservative regimes in optical binding of colloidal matter. | Davenport, Dominique; Kleckner, Dustin | We study light generated inter-particle interactions known as optical binding. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 433 | What kinds of forces does optical binding produce? | Kleckner, Dustin; Davenport, Dominique | Optical binding is an attractive tool for controlling colloidal forces because it offers a highly tunable method of producing inter-particle forces without chemical modifications. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 434 | The odd flows of a colloidal chiral fluid | Bililign, Ephraim; Soni, Vishal; Magkiriadou, Sofia; Sacanna, Stefano; Bartolo, Denis; Shelley, Michael; Irvine, William | We report the assembly of a chiral fluid composed of millions of spinning colloidal magnets. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 435 | Rectification of energy and motion in non-equilibrium parity violating metamaterials | Liao, Zhenghan; Irvine, William; Vaikuntanathan, Suriyanarayanan | Rectification of energy and motion in non-equilibrium parity violating metamaterials | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 436 | Robotic swarms as adaptive active matter | Pittayakanchit, Weerapat; Falk, Martin; Wu, Jiayi; Murugan, Arvind; Jaeger, Heinrich | Here, we study a model of active matter with adaptive activity inspired by recent experiments on mechanically coupled robotic swarms. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 437 | Rheology of Active Polymer-like T. Tubifex Worms | Deblais, Antoine; Woutersen, Sander; Bonn, Daniel | Here we experimentally study the rheology of long, slender and entangled living worms ( Tubifex tubifex) and propose this system as a new type of active polymer. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 438 | Collective Behavior of Worm Blobs | Ozkan-Aydin, Yasemin; Goldman, Daniel; Bhamla, Saad | We study the aggregation of blackworms( Lumbriculus variegatus ) into large ensembles of entangled, living “blobs” composed of thousands of slender bodies knotted together. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 439 | Predicting Crowd Dynamics Using Local Structure | Giannini, Julia; Stanifer, Ethan; Manning, M. Lisa | To address this issue, we have developed a novel method to generate static packings in an artificial potential that reproduce the packing structures in a class of point-of-interest active SPP crowd simulations. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 440 | The dynamics of in-silico active filamentous elastic swimmers explored using Brownian dynamics simulations | Akpinaroglu, Deniz; Gopinath, Arvind | Here, we study the spatiotemporal dynamics of a computationally minimal swimmer – an active elastic filament attached to a viscous cargo that can move in a plane. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 441 | Controlled reversal of vortex chirality in populations of colloidal rollers | Zhang, Bo; Sokolov, Andrey; Snezhko, Oleksiy | We demonstrate in experiments and simulations that active chiral liquids in a collective vortex state exhibit memory and the subsequent formation of the polar states is not random. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 442 | Mechanics of ultrasonically levitated active granular membranes | Lim, Melody; Souslov, Anton; Vitelli, Vincenzo; Jaeger, Heinrich | We explore granular rafts in an acoustic trap consisting of hundreds of macroscopic particles. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 443 | Impact of wall constraint on the dynamics of self-propelled particles | Yamamoto, Ryoichi; Fadda, Federico; Molina, John J. | In the present study, we investigate the dynamics of two popular types of self-propelled particles, i.e., spherical micro-swimmers (squirmers) and rolling spheres (Quincke rollers) on a flat plate and by means of direct numerical simulation of fluid/particle composite systems with fully resolving the hydrodynamics. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 444 | Construction of non-equilibrium structures by insect aggregations: the case of fire ants | Wagner, Robert; Shen, Tong; Vernerey, Franck; Such, Kristen; Hobbs, Ethan | In this presentation, we explore the mechanical rules individual fire ants follow on the surfaces of these towers by measuring their statistical velocity distribution, parking rates, and unparking rates, through imaging analysis. | Session 26: Emergent Mechanics of Active, Robotic, and Living Materials |
| 445 | Generative and Reinforcement Learning assisted Material Design | Rajak, Pankaj | In recent years, machine learning (ML) models based on supervised learning has shown tremendous success in materials property prediction such as band gap, elastic modules, thermo-electric properties that has accelerated the discovery of new materials. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 446 | Unbiasing machine learning for molecular dynamics: emphasising out-of-equilibrium geometries using clustering | Cordeiro Fonseca, Grégory; Poltavskyi, Igor; Tkatchenko, Alexandre | We propose a method to train unbiased ML FF, which leads to equally accurate predictions independently of the density of training data. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 447 | Challenges in developing an extremely accurate many-body force field | Decolvenaere, Elizabeth; Kormos, Rian; Donchev, Alexander; Klepeis, John; Shaw, David | I will describe some of our recent work that leverages machine learning ideas to generate high-accuracy quantum chemical reference data for the fitting of two-body and many-body models. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 448 | Uncertainty quantification in molecular simulations with dropout neural network potentials | Wen, Mingjian; Tadmor, Ellad | In this paper, we propose a new class of Dropout Uncertainty Neural Network (DUNN) potentials, which provide rigorous uncertainty estimates that can be understood from both Bayesian and frequentist statistics perspectives. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 449 | Improving Fidelity and Transferability of Machine-Learned Reactive Interatomic Models Through Active Learning | Lindsey, Rebecca; Fried, Laurence; Goldman, Nir; Bastea, Sorin | In this work, we present the Chebyshev Interaction Model for Efficient Simulation (ChIMES), a ML force field targeting chemistry in condensed phase systems. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 450 | Uncertainty quantification of classical interatomic potentials in OpenKIM database | Kurniawan, Yonatan; Petrie, Cody; Williams, Kinamo; Transtrum, Mark | I compare Bayesian (Markov Chain Monte Carlo) and Frequentist (profile likelihood) methods to quantify uncertainty of IM parameters. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 451 | Molecular dynamics density and viscosity simulations of alkanes | Santak, Pavao; Conduit, Gareth | We develop a new method to systematically identify the range of shear rates at which the simulations are performed. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 452 | Study of the microstructure of amorphous silicon and its effect on Li transportation with neural network potential | Li, Wenwen; Ando, Yasunobu | In this talk, neural network (NN) potential is used to study Li diffusion mechanism in amorphous silicon ( a-Si). | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 453 | Relative entropy indicates an ideal concentration for structure-based coarse graining of binary mixtures | Rosenberger, David; van der Vegt, Nico | Many methodological approaches have been proposed to improve systematic or bottom-up coarse-graining techniques to enhance the representability and transferability of the derived interaction potentials. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 454 | Exploring, fitting, and characterizing the configuration space of materials with multiscale universal descriptors | Bernstein, Noam; Deringer, Volker; Csányi, Gábor | We present a universal set of multiscale Smooth Overlaps of Atomic Position (SOAP) parameters that can be used for a wide range of purposes. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 455 | Predictive Atomistic Simulations of Materials using SNAP Data-Driven Potentials | Thompson, Aidan; Wood, Mitchell; Cusentino, Mary Alice; Tranchida, Julien; Lubbers, Nicholas; Moore, Stan; Gayatri, Rahul | The relatively large computational cost of SNAP is offset by combining LAMMPS’ spatial parallel algorithms with Kokkos-based hierarchical multithreading, enabling the efficient use of Peta- to Exa-scale CPU and GPU platforms. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 456 | Accurate and Data-Efficient Machine Learning Force Fields for Periodic Systems | Gálvez-González, Luis; Sauceda, Huziel; Chmiela, Stefan; Posada-Amarillas, Alvaro; Paz-Borbón, Lauro Oliver; Müller, Klaus-Robert; Tkatchenko, Alexandre | In this work, we present an extension of the symmetrized gradient-domain machine learning (sGDML) framework [1][2] for periodic systems, which allows the construction of accurate molecular force fields with high data efficiency. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 457 | Phase diagrams of nuclear pasta phases in neutron star matter | Munoz, Jorge; Lopez, Jorge | We performed classical molecular dynamics simulations with modified Pandharipande potentials at temperatures from 0.2 to 4 MeV, densities from 0.04 to 0.08 nucleons/fm3, and proton fraction from 0.1 to 0.5. We built a dataset of configurations by selecting 9,600 uncorrelated instants from the simulations and calculated the Minkowski functionals (volume, surface, integral mean curvature, and Euler characteristic) from which the phase of the nuclear pasta at each instant can be determined. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 458 | Deep Learning for molecular simulation and spectra calculation | Zhang, Linfeng | I will discuss some mathematical perspectives of model representation and exploration of ab initio data for generating reliable deep learning-based models that represent the interatomic potential energy surface and electronic information of complex systems. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 459 | Recurrent Neural Networks Based Integrators for Molecular Dynamics Simulations | Kadupitiya, JCS; Fox, Geoffrey; Jadhao, Vikram | We introduce and develop recurrent neural networks (RNN) based Integrators (“surrogate”) for learning MD dynamics of physical systems generally simulated with Verlet solvers. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 460 | Computing RPA adsorption enthalpies by machine learning thermodynamic perturbation theory | Rocca, Dario; Chehaibou, Bilal; Badawi, Michael; Bucko, Tomas; Bazhirov, Timur | We propose a method that couples machine learning techniques with thermodynamic perturbation theory to estimate finite-temperature properties using correlated approximations [1]. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 461 | Neural Network Potentials for Twisted Few-Layer Materials | Kucukbenli, Emine; Kaxiras, Efthimios | In this talk we present our attempt at developing such a potential via neural networks, and how the challenges highlighted above translate into practical steps during training and testing. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 462 | Developement of reliable neural network potential for metal–semiconductor interface reaction: case study for Ni silicidation | Jeong, Wonseok; Yoo, Dongsun; Lee, Kyuhyun; Han, Seungwu | We present a systematic way to build up the training set that can describe the interface reaction. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 463 | Linearized machine learning potential with high-order rotational polynomial invariants for multi-component systems | Seko, Atsuto; Tanaka, Isao | The present study proposes a formulation of linearized MLP extended to multi-component systems involving high-order rotational invariants. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 464 | Transfer learning of neural network potentials for reactive chemistry | Goodpaster, Jason | In this study, we are developing a method to train a neural network potential with high-level wavefunction theory on targeted system of interest that are able to describe bond breaking. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 465 | Insights about accelrated dynamics calculations of the acid pKa beyond biasing the coordination number collective variable | Wexler, Carlos; Guo, Jiasen; Albesa, Alberto | We studied the deprotonation of acetic acid using the ReaxFF in simulation boxes of varying sizes and observed significant size dependence of ΔG when biasing with a single CV representing the coordination number of the acetate oxygen atoms. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 466 | Multitask machine learning of collective variables for enhanced sampling of reactive molecular dynamics | Sun, Lixin; Batzner, Simon; Vandermause, Jonathan; Xie, Yu; Kozinsky, Boris | In this work, we propose a multi-task machine learning algorithm to learn collective variables (CVs) from short MD trajectories and transition path sampling, which preserves the information on state labels and potential energies. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 467 | Exploring Cucurbituril-Fentanyl Binding (and Beyond) with Parallel Biasing Methods | Leonhard, Anne; Whitmer, Jonathan | Here, we discuss new techniques for computing the binding free energy of small organic molecules to cucurbituril (CB) macrocycles (specifically, cucurbit[7]uril with fentanyl) as both a test case of intermediate complexity, and one of great potential application in sensing and remediation platforms. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 468 | Neural Network Interatomic Potentials for Water | Torres, Alberto; Pedroza, Luana; Rocha, Alexandre | In this work we employ ANNs to represent the water potential surface with DFT- and CC-quality, and compare ANNs trained at different levels of theory to discuss the accuracy of different methods in describing macroscopic properties of water under different conditions including nuclear quantum effects. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 469 | Anharmonicity in a linear chain of Lennard-Jones atoms | De La Rocha, Adrian; Munoz, Jorge | Here we present a study of the anharmonicity that arises from atoms in a linear chain interacting via the Lennard-Jones potential and a test run of a dynamic mean field theory in which the atoms only see a harmonic potential but the stiffness of the potentials depends on the configuration of the system which is determined using a machine learning classifier. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 470 | Hunting FOX: Using Fragments to Sniff Out Drug Leads for Antibiotic Discovery | Mansbach, Rachael; Leus, Inga; Mehla, Jitender; Lopez, Cesar; Walker, John; Rybenkov, Valentin; Hengartner, Nicolas; Zgurskaya, Helen; Gnanakaran, S | We approach drug repurposing by introducing an algorithm–which we term "Hunting FOX" for "Hunting Fragments Of X"–that combines a fragment-based representation with traditional machine learning to identify the most important submolecules correlating with an activity of interest. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 471 | The Self Learning Kinetic Monte Carlo (SLKMC) method augmented with data analytics for adatom-island diffusion on surfaces | Rahman, Talat | In this talk, I will present results for the diffusion kinetics of two dimensional adatoms islands in homoepitaxial and heteroepitaxial systems. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 472 | Accelerated Discovery of Dielectric Polymer Materials Using Graph Convolutional Neural Networks | Mishra, Ankit; Rajak, Pankaj; Cubuk, Ekin; Nomura, Ken-ichi; Kalia, Rajiv; Nakano, Aiichiro; Deshmukh, Ajinkya; Chen, Lihua; Sotzing, Greg; Cao, Yang; Ramprasad, Ramamurthy; Vashishta, Priya | Here, we propose a deep learning-based graph convolutional neural network (GNN) model that can identify polymer systems capable of exhibiting increased energy and power density. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 473 | Deep Learning embedding layers for better prediction of atomic forces in solids | Niv, Sivan; Gordon, Goren; Natan, Amir | We demonstrate this by the calculation of phonons in several solids and by the analysis of force derivatives in systems where we move single atoms and compare the DL predicted force derivatives to the DFT results. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 474 | A molecular dynamics study of water crystallization using deep neural network potentials of ab-initio quality | Piaggi, Pablo; Car, Roberto | We describe the complex interactions between water molecules using deep neural network potentials[1] and employ state of the art enhanced sampling methods[2] to convert reversibly liquid water into ice Ih. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 475 | Machine learning force field using decomposed atomic energies from ab initio calculations | Wang, Lin-Wang | In this talk, we will present our results using both neural network model and Gaussian process regression to represent such force fields. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 476 | Machine learning to derive quantum-informed and chemically-aware force fields to simulate interfaces and defects in hybrid halide perovskites | Larsen, Ross; Jankousky, Matthew; Vigil-Fowler, Derek; Holder, Aaron; Johnson, K. | We demonstrate a machine learning (ML) approach to predict quantum-derived atomic properties (e.g., charge, dipole moment, etc.) from descriptors of the local environment. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 477 | Active Learning of Coarse Grained Force Fields with Gaussian Process Regression | Duschatko, Blake; Vandermause, Jonathan; Molinari, Nicola; Kozinsky, Boris | We propose a novel machine learning method for automatically constructing coarse grained force fields by active learning. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 478 | External Potential Ensembles to Improve the Learning of Transferable Coarse-Grained Potentials | Shen, Kevin; Delaney, Kris; Shell, M. Scott; Fredrickson, Glenn | We demonstrate this approach by using external potential ensembles with the relative entropy optimization to parametrize highly coarse grained models of solvent mixtures from atomistic force fields. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 479 | Data-driven parameterization of coarse-grained models of soft materials using machine learning tools | Johnson, Lilian; Phelan, Frederick | Here, we combine a bottom-up coarse-grained model with a dissipative potential to obtain a chemically specific, thermodynamically consistent, and dynamically correct model. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 480 | JAX, M.D. End-to-End Differentiable, Hardware Accelerated, Molecular Dynamics in Pure Python | Schoenholz, Sam; Cubuk, Ekin | In this presentation we explore the architecture of JAX MD and its capabilities through several vignettes. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 481 | A neural network interatomic potential for molten NaCl | Li, Qingjie; Kucukbenli, Emine; Lam, Stephen; Khaykovich, Boris; Kaxiras, Efthimios; Li, Ju | In this talk, we present the application of artificial neural-network (NN) in training accurate interatomic potentials that enable fast evaluations of salt properties on desired time-and length-scales. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 482 | Simulating Aluminum Corrosion Using DFT Trained Deep Neural Network Potentials | Saidi, Wissam; Dwaraknath, Shyam | Here we demonstrate the power of a deep neural network potential (DNP) to model the stability of various phases and terminations of Al2O3 on Al. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 483 | Tensor-Field Molecular Dynamics: A Deep Learning model for highly accurate, symmetry-preserving force-fields from small data sets | Batzner, Simon; Sun, Lixin; Smidt, Tess; Kozinsky, Boris | We present a framework to learn highly accurate Machine-Learning Force-Fields from small training sets. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 484 | Using Topological Constraints to Modify Polymer Materials | Kremer, Kurt | Using Topological Constraints to Modify Polymer Materials | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 485 | Simpler is Better: How Linear Prediction Tasks Improve Transfer Learning in Chemical Autoencoders | Iovanac, Nick; Savoie, Brett | In this talk we investigate these questions using an autoencoder latent space as a latent variable for transfer learning models trained on the QM9 dataset that have been supplemented with quantum chemistry calculations. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 486 | Neural Network Based Molecular Dynamics to Study Polymers | Kuenneth, Christopher; Ramprasad, Ramamurthy | Neural network based models for molecular dynamics, the subject of this study, are capable of learning from reference quantum mechanical data. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 487 | Applications of Automatic Differentiation to Materials Design | King, Ella; Goodrich, Carl; Schoenholz, Sam; Cubuk, Ekin; Brenner, Michael | We demonstrate the power of AD in materials design by building on a seminal paper by Torquato. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 488 | Trainable Molecular Dynamics Models | Goodrich, Carl; King, Ella; Schoenholz, Samuel; Cubuk, Ekin; Brenner, Michael | We will discuss the first steps towards Trainable Molecular Dynamics Models (TMDMs): how they work, their significant potential for scientific and technological discovery, and initial discoveries of non-trivial self-assembly pathways. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 489 | Hydrogen-Oxygen Combustion: Data-Driven Generation of Quantum-Accurate Interatomic Potentials | Avila, Allan; Bertels, Luke; Mezic, Igor; Head-Gordon, Martin | We demonstrate how the programmable potentials methodology can be utilized to develop quantum accurate molecular level potentials for several intermediate reactions involved in hydrogen-oxygen combustion. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 490 | Toward optimal descriptors for accurate machine learning of flexible molecules | Vassilev Galindo, Valentin; Poltavskyi, Igor; Tkatchenko, Alexandre | Our objective is to test how the ability to accurately reproduce PES depends upon the choice of a molecular descriptor. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 491 | Towards transferable parametrization of Density-Functional Tight-Binding with machine learning | Medrano Sandonas, Leonardo; Stoehr, Martin; Tkatchenko, Alexandre | Using the QM7-X database of small organic molecules, we demonstrate that the DFTB repulsive energy can be effectively learned by means of ML-approaches including neural networks and kernel ridge regression. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 492 | Active learning of fast Bayesian force fields with mapped gaussian processes – application to stability of stanene | Xie, Yu; Vandermause, Jonathan; Sun, Lixin; Cepellotti, Andrea; Kozinsky, Boris | We present progress in implementing automated active learning workflows for training BFFs, aimed at large-scale simulations of rare event dynamics in complex materials. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 493 | Nuclear quantum delocalization enhances non-covalent intramolecular interactions: A machine learning and path integral molecular dynamics study | Sauceda, Huziel; Vassilev Galindo, Valentin; Chmiela, Stefan; Müller, Klaus-Robert; Tkatchenko, Alexandre | In this study, we present evidence that nuclear delocalization can enhance electronic and electrostatic interactions that promote localized dynamics. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 494 | Active learning identifies optimal π-conjugated peptide chemistries for optoelectronics | Shmilovich, Kirill; Ferguson, Andrew | In this work we perform active learning discovery within an embedded chemical space of pi-conjugated peptides using coarse-grained molecular dynamics simulation to discover molecules with emergent optoelectronic behavior. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 495 | A Self-consistent Artificial Neural Network Inter-atomic Potential for Li/C Systems | Shaidu, Yusuf; Lot, Ruggero; Pellegrini, Franco; Kucukbenli, Emine; de Gironcoli, Stefano | In this talk we first present a self-consistent approach to construct a neural network potential for Carbon using the PANNA code[2]. | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 496 | Active Learning Driven Machine Learning Inter-Atomic Potentials Generation: A Case Study for Hafnium dioxide | Sivaraman, Ganesh; Krishnamoorthy, Anand; Baur, Matthias; Holm, Christian; Stan, Marius; Csányi, Gábor; Benmore, Chris; Vazquez-Mayagoitia, Alvaro | We propose a novel active learning scheme to automate the configuration selection to fit the Gaussian Approximation Potential (GAP). | Session 27: Emerging Trends in Molecular Dynamics Simulations and Machine Learning |
| 497 | What Can Knitting Machines Make? | McCann, James | The important insight made in this work is that the way the yarn is routed between stitches is as important to model as the way the yarn behaves within stitches. | Session 28: Fabric, Knits and Knots |
| 498 | Knitting Machine State Representation Using the Artin Braid Group | LIN, JENNY; McCann, James | To enable the computation of optimal machine knitting patterns, we developed an abstraction of the knitting machine state that uses the Artin braid group when describing interstitch relationships. | Session 28: Fabric, Knits and Knots |
| 499 | Mechanics-Based Simulation of Multistable Knitted Fabrics | Ding, Xiaoxiao; Rycroft, Christopher; Bertoldi, Katia | Given this complexity, we are motivated to develop a mechanics-based predictive model that accounts for mechanical parameters in this mechanics-based process. | Session 28: Fabric, Knits and Knots |
| 500 | Constructing a constitutive model of knitted fabric | Dimitriyev, Michael; Singal, Krishma; Matsumoto, Elisabetta | To make progress towards this end, we seek a method of generating constitutive relations for a given stitch pattern. | Session 28: Fabric, Knits and Knots |
| 501 | Stress-Strain Studies of Knitted Swatches | Singal, Krishma; Dimitriyev, Michael; Matsumoto, Elisabetta | To quantify this shape change we are developing a method for tracking the 3D path of the yarn. | Session 28: Fabric, Knits and Knots |
| 502 | Emergent yarns and fabrics by twist origami | Chopin, Julien; Kudrolli, Arshad | Thus, we propose an origami starting with an inextensible sheet with a prescribed number of triangular folds corresponding those observed at the onset of transverse wrinkling of the elastic sheet as a starting point to analyze the emergence of the structure. | Session 28: Fabric, Knits and Knots |
| 503 | A Study of Two-Periodic Knitted Fabrics using Tangles | Markande, Shashank; Matsumoto, Elisabetta | We have previously created a framework to classify and characterize two-periodic stitch patterns of knitted fabrics that is based on knot and link theory. | Session 28: Fabric, Knits and Knots |
| 504 | Untangling the mechanics of the clove hitch knot | Sano, Tomohiko; Grandgeorge, Paul; Johanns, Paul; Baek, Changyeob; Singh, Harmeet; Maddocks, John; Reis, Pedro | In our study, we combine experiments (mechanical testing and X-ray tomography), finite element and a theory based on the Kirchhoff equations. | Session 28: Fabric, Knits and Knots |
| 505 | To stop or not to stop: The stopper knot as a friction device | Johanns, Paul; Grandgeorge, Paul; Sano, Tomohiko; Baek, Changyeob; Reis, Pedro | We tackle this problem by performing a combination of mechanical testing and X-ray tomography on a variety of stopper knots. | Session 28: Fabric, Knits and Knots |
| 506 | Topological Mechanics of Knots and Tangles | Patil, Vishal; Sandt, Joseph; Kolle, Mathias; Dunkel, Jorn | Here, we combine optomechanical experiments with theory and simulations to analyze the behavior of knots in flexible fibers that change their color in response to mechanical deformations. | Session 28: Fabric, Knits and Knots |
| 507 | tbd | Dion, Genevieve | tbd | Session 28: Fabric, Knits and Knots |
| 508 | String Contraction via Twisting: Ideal and Nonideal Behavior | Hanlan, Jesse; Davis, Gabrielle; Durian, Douglas | Here we compare this model with data for single, double and triple stranded strings of parachute cords, rattail cord, nylon, kevlar, monofilament fishing line, and metal wire. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 509 | Contact geometry of equidistant tubes | Singh, Harmeet; Grandgeorge, Paul; Sano, Tomohiko; Reis, Pedro; Maddocks, John | We consider equilibrium configurations of two flexible tubes arranged in space such that their centrelines are separated by a constant distance. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 510 | Fibered by fibers: the geometry and elasticity of frustrated filaments | Atkinson, Daria; Santangelo, Christian; Grason, Gregory | To describe nonequidistant configurations, we derive a geometrically nonlinear, coordinate invariant, gauge-like theory for the elasticity of filamentous materials. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 511 | Disease outbreak as stochastic resonance: interplay between host-seeking behavior and heterogeneous human/vector interactions results in system amplification | Parker, Joshua; Pecor, Dave; Wayant, Nicole | We perform phase space analysis on a mathematical model of mosquito-borne disease that incorporates the full mosquito life cycle. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 512 | Impact of initial seeds in cooperative contagion processes | Min, Byungjoon | In this work, we modulate the probability of infection depending on the state of nodes taking into account the cooperativity between different pathogens. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 513 | Degree-preserving Network Growth | Kharel, Shubha; Mezei, Tamás; Chung, Sukhwan; Soltész, Dániel; Erdos, Peter; Toroczkai, Zoltan | We introduce a novel class of models that encapsulates degree preserving dynamics in the simplest form, resulting in structures significantly different from previous ones. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 514 | Synchronization of Coupled Kuramoto Oscillators under Resource Constraints | Wiley, Keith; Mucha, Peter; Bassett, Danielle | A fundamental understanding of synchronized behavior in multi-agent systems can be acquired by studying analytically tractable Kuramoto models. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 515 | Model reduction of large networked systems using the Manifold Boundary Approximation Method | Francis, Benjamin; Nuttall, Jacob; Transtrum, Mark; Sarić, Andrija; Stanković, Aleksandar | Using techniques of information geometry, we derive reduced models of the network that act as effective theories in cases where only partial system measurements are available using the Manifold Boundary Approximation Method (MBAM). | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 516 | Path-dependent Dynamics Induced by Rewiring Networks of Kuramoto Oscillators with Inertia | Qian, William; Papadopoulos, Evangelia; Lu, Zhixin; Bassett, Danielle | Many studies have gained key insights into this question by studying the classic Kuramoto oscillator model on static networks. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 517 | Distribution of the Sizes of theBblackouts in Power Grids, Synthetic Models, and the Motter and Lai Model under different Dynamical Rules and Criteria of Overload | Cwilich, Gabriel; Buldyrev, Sergey; Kornbluth, Yosef | Studies of the sizes of the blackouts in real grids and computer simulation models of them using the direct current approximation suggest that the resulting blackout sizes are distributed as a power law when using the standard criterion of resilience, the so-called N-1 condition: The grid must safely operate in the event of a failure of any single line. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 518 | Generating individual aging trajectories with a network model | Farrell, Spencer; Mitnitski, Arnold; Rockwood, Kenneth; Rutenberg, Andrew | We model this process with a set of health attributes as nodes that interact in a network leading to mortality. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 519 | Modeling the Dynamics of Belief in Climate Change with Statistical Physics | Aigner, Ernest; Brown, Jackie; Furlong, Kyle; Gier, David; Holmér, Ludvig; Vallomparambath PanikkasserySu, Ritwika | The model enables us to analyse the interactions between social belief dynamics in networks and climate impacts and suggest when and if a consensus about climate change will form in the wake of extreme climate-related weather events. | Session 29: Fabric, Knits and Knots II / Complex Networks |
| 520 | Flow of concentrated and highly polydisperse emulsions | Weeks, Eric; Jiang, Yonglun; Clara-Rahola, Joaquim | We study experiments and simulations of highly polydisperse emulsions under shear flow. | Session 30: Flow and Structure in Dense Suspensions |
| 521 | Fingering in dense suspensions | Lee, Sungyon | We present the new quantitative measurements that highlight these differences and discuss how the wall confinement may alter the particle dynamics and the resultant fingering patterns. | Session 30: Flow and Structure in Dense Suspensions |
| 522 | The rheology of chocolate making | Blanco, Elena; Hodgson, Daniel; Hermes, Michiel; Besseling, Rut; Hunter, Gary; Chaikin, Paul; Cates, Michael; Van Damme, Isabella; Poon, Wilson | Studying the rheology of a simplified formulation, we find that the input of mechanical energy and staged addition of surfactants combine to effect a considerable shift in the frictional jamming volume fraction of the system, thus increasing the maximum flowable solid content. | Session 30: Flow and Structure in Dense Suspensions |
| 523 | Suspensions of non-Brownian particles in complex fluids: Rheology, microstructure and fluid mechanics | Hormozi, Sarah | This talk will introduce an array of experimental and modeling techniques that my research team uses to investigate rheological properties and fluid dynamical behavior of the complex slurries. | Session 30: Flow and Structure in Dense Suspensions |
| 524 | Force networks in shear thickening suspension | Morris, Jeffrey | Using methods of k-core analysis and persistent homology, we explore the role of the particle contact network connectivity, and will present signatures of the rheological transition in terms of both local and global measures of the connectivity. | Session 30: Flow and Structure in Dense Suspensions |
| 525 | Bistability in the Flow of Polymer Solutions in Porous Media | Browne, Christopher; Shih, Audrey; Datta, Sujit | We shed light on this question by systematically varying the spacing between pores. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 526 | Shear melting and recovery of cellulose nanocrystal-polymer gels | Rao, Abhinav; Divoux, Thibaut; McKinley, Gareth; Hart, John | Here, we study the rheological behavior of composite polymer-CNC gels in dimethylformamide, which include additives for both UV and thermal crosslinking. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 527 | Observing phase separation in colloid-polymer mixtures with a custom light-sheet rheoscope | Wang, Jing; McGorty, Ryan | We study liquid-liquid phase separation (LLPS) with a colloid-polymer system subjected to shear. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 528 | Understanding and predicting flow instabilities in self-assembled polymers | McCauley, Patrick; Kumar, Satish; Calabrese, Michelle | Despite reported shear banding in polymer WLMs (pWLMs), current research has focused on surfactant WLMs (sWLMs) or linear polymers. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 529 | Depletion Layer Dynamics of Polyelectrolyte Solutions under Poiseuille Flow | King, John; Park, Seong Jun; Shakya, Anisha | Here, we develop a novel adaptation of super-resolution microscopy based on stimulated emission depletion (STED) to directly measure depletion layer composition in real- space with 10s of nanometer resolution. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 530 | Honey bees transport pollen particles of varying shape and size by forming them into a permanent granule | Matherne, Marguerite; Puvvada, Suraj; Guy, Ben; Poon, Wilson; Hu, David | We show that most pellets do not fluidize when subjected to vibrations or when brought into contact with a similar suspension of lower volume fraction, suggesting that it is a permanent granule. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 531 | Shear thickening of dense suspensions in the limit of jamming | Madraki, Yasaman; Ovarlez, Guillaume; Hormozi, Sarah | In this work, we focus on the shear thickening phenomenon that occurs in the limit of jamming. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 532 | A new dimensionless number governing dethickening in orthogonally perturbed shear thickened suspensions | Ramaswamy, Meera; Griniasty, Itay; Shetty, Abhishek; Sethna, James; Cohen, Itai | In this talk, I show that dethickening in the regime where the primary shear flow has fully thickened the suspension, is governed by a single dimensionless parameter – the ratio of the orthogonal shear rate amplitude to that of the primary shear rate. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 533 | Connecting microscale stresses to macromolecular motion in entangled ring-linear DNA blends | Peddireddy, Karthik Reddy; Lee, Megan; Garamella, Jonathan; McGorty, Ryan; Robertson-Anderson, Rae | To elucidate the dynamics of these blends, we demonstrate a novel technique that combines optical tweezers microrheology with fluorescence imaging and differential dynamic microscopy. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 534 | Cell nucleus as a mcirorheological probe to study the rheology of the cytoskeleton | Nazockdast, Ehssan; Moradi, Moslem | We propose a novel method to decouple the mechanics of membrane and cytoskeleton, by analyzing the correlation between the membrane deformations that are induced by external microfluidic flows and nucleus displacements induced by those membrane deformations i.e. we use the nucleus as a microrheological probe to study the rheology of the interior cytoskeleton, independent of membrane rheology. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 535 | The divergence-conforming immersed boundary method: Application to vesicles, capsules, and red blood cells under flow | Casquero, Hugo; Zhang, Yongjie | In order to discretize the higher-oder derivatives that appear in vesicle and capsule formulations, we use C 2-continuous cubic B-splines with periodic knot vectors and C 1-continuous bi-cubic analysis-suitable T-splines in 2D and 3D settings, respectively. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 536 | Flow-induced microstructural rearrangement and rheological consequences for model red blood cell suspensions in microvessels | Chen, Yeng-Long; Liao, Chih-Tang | We investigated how inter-particle attraction affect cluster and particle migration in microvessels, where the near wall particle depletion layers due to hydrodynamics significantly alters fluid viscosity. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 537 | Cross-stream migration of non-spherical particles in a second-order fluid | WANG, Shiyan; Tai, Cheng-Wei; Narsimhan, Vivek | In shear driven flows, we observe that spheroidal particles adjust their orientation to align their longer axis along the vorticity direction, although significant deviations from slender body theories occur for finite aspect ratios. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 538 | Vortices in 2D Colloids | Park, Myeonggon; Li, Bo; Granick, Steve | To understand their roles in material phase states, we observed colloidal crystals comprised of Janus colloids whose anisotropic properties can be controlled. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 539 | On the mechanisms of superspreading | Theodorakis, Panagiotis; Smith, Edward; Müller, Erich; Craster, Richard; Matar, Omar | Here, we report on extensive molecular dynamics simulations of a coarse-grained model based on the SAFT force-field. | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 540 | Microfluidic flow-processing of soft matter systems | Donina, Liva; Cabral, Joao | Microfluidic flow-processing of soft matter systems | Session 31: Flow of Complex Fluids: Rheology, Structure, and Instabilities |
| 541 | Multi-scale relaxation dynamics of arrested patchy particle gels | Song, Jake; Piquette, Marc; de Quesada, Felipe; Rizvi, Mehedi; Zhang, Qingteng; Narayanan, Suresh; Tracy, Joseph; Del Gado, Emanuela; Holten-Andersen, Niels; McKinley, Gareth | We show that, despite the fast dissociation dynamics of an individual polymer linker from the nanoparticle, the relaxation of the system becomes slow and arrested at larger length-scales due to multi-functional associations between the nanoparticles. | Session 32: Gels, Emulsions and Complex Fluids |
| 542 | Nanosheets and Metallo-Hydrogel Formed by 2-nm Metal-Organic Cages based on Electrostatic Interaction | Yang, Yuqing; Li, Hui; Liu, Tianbo; Chen, Jiahui; xie, Ting-zheng; feng, yi; sun, xinyu | Here, we observed a hydrogel formation process from 2-nm emissive, low molecular-weight metal-organic cages at low concentrations (>15 mg/mL) based on counterion-mediated attraction and π-π/hydrophobic interactions. | Session 32: Gels, Emulsions and Complex Fluids |
| 543 | Emergence of Multiscale Dynamics in Colloidal Gels | Cho, Jae Hyung; Cerbino, Roberto; Bischofberger, Irmgard | To gain insight into the kinetics of colloidal gel evolution at low particle volume fractions φ, we utilize differential dynamic microscopy to investigate particle aggregation, geometric percolation, and the subsequent transition to nonergodic dynamics. | Session 32: Gels, Emulsions and Complex Fluids |
| 544 | Size-Dependent Tracer Diffusion in Colloidal Gels | Ryu, Brian; Zia, Roseanna | In this study, we seek a fundamental understanding of how the diffusion of tracer colloids of various sizes are hindered by a porous medium. | Session 32: Gels, Emulsions and Complex Fluids |
| 545 | Connecting the viscoelastic response of nanosheet gels to the elastic properties of the particles | Barwich, Sebastian; Mobius, Matthias | We present a new analytical model that explains this behaviour and connects the bulk response to the elastic properties of single nanosheets and their size. | Session 32: Gels, Emulsions and Complex Fluids |
| 546 | Tunable viscoelasticity of double gel networks: colloidal gels embedded in a hydrogel matrix | Dellatolas, Ippolyti; Cho, Jae Hyung; Divoux, Thibaut; Bischofberger, Irmgard | We create double gel networks consisting of a colloidal gel embedded within a hydrogel matrix. | Session 32: Gels, Emulsions and Complex Fluids |
| 547 | Tuning vaporization threshold of perfluorocarbon by interfacial melting in endoskeletal droplets | Shakya, Gazendra; Hoff, Samuel; Wang, Shiyi; Heinz, Hendrik; Ding, Xiaoyun; Borden, Mark | Several studies have aimed at understanding the vapor embryo nucleation and vaporization behavior of these droplets. | Session 32: Gels, Emulsions and Complex Fluids |
| 548 | Flow of Quasi-2D Emulsion Droplets Through Small Openings | Hofert, Anisa; Jiang, Yonglun; Weeks, Eric | We examine how various parameters affect the flow rate of quasi-2D soft particles moving through tight openings. | Session 32: Gels, Emulsions and Complex Fluids |
| 549 | A granular material spreading as a liquid: growth dynamics of 3D aggregates of oil droplets | Ono-dit-Biot, Jean-Christophe; Lorand, Tanel; Dalnoki-Veress, Kari | In this study, monodisperse frictionless and lightly attractive oil droplets (radius approximately 10 microns) are produced one-by-one in an aqueous solution. | Session 32: Gels, Emulsions and Complex Fluids |
| 550 | Spreading of a 2D granular analogue of a liquid puddle: Predicting structure through a “granular capillary length” | Hoggarth, Johnathan; Ono-dit-Biot, Jean-Christophe; Dalnoki-Veress, Kari | We developed a simple model that can predict the shape of the pile based on the balance of adhesion and buoyancy. | Session 32: Gels, Emulsions and Complex Fluids |
| 551 | Characterizing the effects of Temperature and Ethanol Concentration on the louche of Absinthe. | Bickel, Jessica; Ellis, Anna; Resnick, Andrew | This work examines the emergence of the louche phase in absinthe by measuring the optical transmittance of the solution as a function of both: (1) the concentration of ethanol and (2) the temperature, which can be separately varied. | Session 32: Gels, Emulsions and Complex Fluids |
| 552 | Surface active microgels: dual functioning soft stabilisers | Crosby, David; Martinez, Vincent; Wood, Tiffany; Lips, Alex; Poon, Wilson | We present work done on a commercial microgel system, composed of an amphiphilic polymer called Sepimax Zen (SZ). | Session 32: Gels, Emulsions and Complex Fluids |
| 553 | Clustering Colloids with Polymer Bridges | Hueckel, Theodore; Opdam, Joeri; Snoeren, Thom; Tuinier, Remco; Sacanna, Stefano | Here, a general approach to heteroaggregation is described where particles are speciated as either polymer-coated or bare and made to bind specifically to their counterpart through polymer bridging. | Session 32: Gels, Emulsions and Complex Fluids |
| 554 | Universal elasticity in nearly floppy soft matter | Tighe, Brian | We consider the case where non-central force constraints are present, but carry a weaker energetic cost than their spring-like counterparts. | Session 32: Gels, Emulsions and Complex Fluids |
| 555 | Solving the equilibrium dynamics of particle systems in infinite dimensions | Manacorda, Alessandro; Zamponi, Francesco; Schehr, Grégory | In the last years, a general framework to study the dynamics of particle systems in infinite dimensions has been developed. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 556 | Investigating Hydrogen Glass Dynamics in Amorphous Germanium and Amorphous Silicon-Germanium Alloys | Knauber, Brenda; EslamiSaray, Mohammad Ali; Kakalios, James | A set of hydrogenated amorphous silicon-germanium alloys are studied to investigate the transition in the noise statistics and conductivity relaxation as the alloy fraction changes. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 557 | Towards a Unifying Scaling Theory of Rigidity Transitions | Jafarpour, Farshid; Ridout, Sean; Liu, Andrea | We study a spring-network model that exhibits both types of transitions and provide a unifying perspective based on a scaling ansatz for the rigidity transition in this model. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 558 | Soft glassy dynamics and rheology: A damped soft-sphere model | Thirumalaiswamy, Amruthesh; Riggleman, Robert; Crocker, John | In this work, we extend our previous study by performing bubble dynamics simulations with damped, non-inertial bubbles evolving similar to ripening observed in foams. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 559 | Crystallization Instability in Glass-Forming Mixtures | Royall, Paddy; Ingebrigsten, Trond; Dyre, Jeppe; Schroder, Thomas | Here we use GPU simulations to reveal a general nucleation mechanism in mixtures. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 560 | Cells on spheres: glassy dynamics of vertex models in curved space | Sussman, Daniel | The analogy between cellular monolayers and aggregates on the one hand and jammed solids or colloidal glasses on the other has provided a powerful framework for probing questions of rigidity, motilitiy, and collective excitations in dense biological tissues. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 561 | Anticipating Challenges of Propensity Measurements in Colloidal Systems | Donofrio, Cordell; Weeks, Eric | We introduce polydispersity by splitting the population of each of the binary components into its own binary where half are increased in size and the other half are decreased in size by the same percentage. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 562 | Glassy behavior and memory effects in the elastic response of a disordered protein | Morgan, Ian; Avinery, Ram; Beck, Roy; Saleh, Omar | We use a single-molecule stretching technique, magnetic tweezers, to force a disordered polyprotein out of equilibrium, and observe the relaxation of its end-to-end extension. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 563 | Crystallization properties of amorphous and supercooled liquid antimony | Mazzarello, Riccardo; Ronneberger, Ider; Chen, Yuhan; Zhang, Wei | In this talk, we investigate the structural and crystallization properties of amorphous and supercooled liquid models of pure and alloyed antimony by ab initio molecular dynamics. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 564 | Jammed solids held together with pins: The effect of pin geometry on structure and mechanical response | Graves, Amy; Packer, Liam; Jenike, Brian; Liloia, Ari; Ridout, Sean | Here, we address unanswered questions on the geometrical role that a scaffolding of fixed particles, or "pins", plays in structure and dynamical response of jammed, soft bi- or polydisperse particles. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 565 | Boundary and Interface Modes in Periodically Triangulated Origami | McInerney, James; Chen, Bryan; Theran, Louis; Santangelo, Christian; Rocklin, Zeb | Here, we investigate the linear modes of triangulated origami, for which the number of constraints matches the number of degrees of freedom, i.e. mechanical criticality. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 566 | High Throughput Mechanical Quantification of Glassy Thin Films using Additively Manufactured Elastomeric Lattices | Vaia, Richard; Auguste, Anesia; Schantz, Allen; Gillman, Andrew; Tibbits, Andrew; Buskohl, Philip | In this work, we will discuss a high throughput concept to measure the elastic moduli, plasticity and failure strain of thin polymer films. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 567 | Classical E&M with a twist: A geometric Hall effect without magnetic field | Schade, Nicholas; Schuster, David; Nagel, Sidney | We demonstrate a fundamentally novel use of geometry to create transverse potentials along curved paths without any magnetic field. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 568 | Rigidity Transitions in Flexible Polymer Networks | Little, Justin; Bruinsma, Robijn | We show that networks of flexible polymers in good solvent described by the Edward’s Hamiltonian undergo first-order rigidity transitions as the excluded volume interaction is increased. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 569 | Biological Regulatory Networks are Minimally Frustrated | Tripathi, Shubham; Kessler, David; Levine, Herbert | Here, using a Boolean modeling framework to compare the dynamical behavior of five real biological networks to that of random networks with similar topological features, we show that biological networks possess sets of stables states that are minimally frustrated. | Session 33: Glassy Dynamics: From Simple Models to Biological Tissues |
| 570 | Mechanics of Deformation in 3D Granular Materials Using X-ray Measurements | Hurley, Ryan; Zhai, Chongpu; Herbold, Eric; Hall, Stephen | In this talk, I will discuss our experiments combining in-situ X-ray computed tomography (XRCT) and 3D X-ray diffraction (3DXRD) during the deformation of granular materials. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 571 | Dimensionality and viscosity exponent in shear-driven jamming | Olsson, Peter | Contrary to the prevailing picture, and in contrast to results from isotropic jamming from compression or quench, we find that the critical exponents in three dimensions are different from those in two dimensions and conclude that shear-driven jamming in two and three dimensions belong to different universality classes. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 572 | Identification of a universal data collapse in the rheology of granular media | Kim, Seongmin; Kamrin, Kenneth | We propose a reduced description of nonlocal phenomena in dense granular flows where the shear stress ratio μ is not locally determined by the inertial number (dimensionless shear rate) I. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 573 | Nonlocal rheology of dense granular flows: the effect of particle and boundary properties | Fazelpour, Farnaz; Tang, Zhu; Daniels, Karen | This model extends a local Bagnold-type granular flow law to include a Laplacian term governing the diffusion of fluidity. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 574 | Local plastic deformation in sheared highly polydisperse foams | Jiang, Yonglun; Weeks, Eric | We simulate the shear of dense two-dimensional foams using the Durian bubble model with a Lees-Edwards boundary condition. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 575 | Generalized Granular Resistive Force Theory for Rate-Dependent Intrusions | Karsai, Andras; Agarwal, Shashank; Kamrin, Kenneth; Goldman, Daniel | Based on the observed physics of the flow model simulation, we propose a modified RFT for arbitrary intruders that reconciles both cases using a geometry-dependent modification and an additional macro-inertial resistance, extending RFT beyond describing quasistatic intruding bodies. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 576 | Stick-slip and intermittent flow dynamics of a single-grain intruder driven through a granular medium with and without basal friction | Kozlowski, Ryan; Carlevaro, C; Daniels, Karen; Kondic, Lou; Pugnaloni, Luis; Socolar, Joshua; Zheng, Hu; Behringer, Robert | We report on experiments in which a grain-sized intruder is pushed by a spring through a quasi-2D granular material in an annular geometry. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 577 | Intruder dynamics in a 2D granular system: Effects of dynamic and static basal friction | Socolar, Joshua; Carlevaro, C; Pugnaloni, Luis; Kozlowski, Ryan; Zheng, Hu; Kondic, Lou | We discuss the results of simulations of an intruder pulled through a 2D granular system by a spring, using a model designed to lend insight into the experimental findings described by Kozlowski et al. [Phys. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 578 | Drafting of intruders in dry and fluid-saturated granular beds | Allen, Benjamin; Kudrolli, Arshad | We discuss an experimental study of the drag experienced by two vertical rods as they follow each other around a circular track while being dragged across a granular bed. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 579 | Reduction in Resistive Forces by Directional Air Fluidization in Dry Granular Media | Murray-Cooper, Mason; Karsai, Andras; Ozkan-Aydin, Yasemin; Naclerio, Nicholas; Hawkes, Elliot; Goldman, Daniel | Reduction in Resistive Forces by Directional Air Fluidization in Dry Granular Media | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 580 | Properties of air-fluidized granular media | Lopez-Castano, Miguel Angel; González-Saavedra, Juan Francisco; Rodríguez-Rivas, Álvaro; Vega Reyes, Francisco | We study a 2D granular system of particles intercacting via a short-ranged potential, and thermalized homogeneously. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 581 | Granular chiral separation | Dong, Ruo-Yu; Lach, Slawomir; Sobolev, Yaroslav; Grzybowski, Bartosz; Granick, Steve | We corroborate the experimental finding with theoretical predictions and extend the single particle phenomena to multi-particles. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 582 | Super-Flory scaling in compressed micro-gel packings | Elgailani, Ahmed; Maloney, Craig | We perform multi-body finite element simulations of packings of hydrogel particles immersed in a large solvent bath in 2D at various particle volume fraction, φ using the Flory-Rehner constitutive law to model the mechanics of the hydrogel network. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 583 | Flow-Arrest Transition in Granular Materials | Srivastava, Ishan; Grest, Gary; Lechman, Jeremy; Silbert, Leo | In this talk, I will describe our stress-controlled granular simulations that indicate a highly stochastic nature of this transition with long-tailed distributions of flowing times before arrest, which diverge as a power law at a critical stress ratio. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 584 | Shear thickening and jamming of dense suspensions: the importance of rolling friction | Singh, Abhinendra; Ness, Christopher; De Pablo, Juan; Jaeger, Heinrich | We show via simulations that using rolling friction together with sliding friction can significantly decrease the volume fraction required for the onset of DST and SJ leading to enhanced shear thickening. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 585 | Tuning Solvent Chemistry to Suppress Shear-Jamming in Dense Suspensions | Van der Naald, Michael; Zhao, Liang; Jackson, Grayson; Jaeger, Heinrich | We here report both steady state rheology and the transient impact response tracked by high-speed ultrasound imaging [2] for silica nanoparticles dispersed in polyethylene glycols (PEGs) of varied chain lengths. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 586 | Yielding and Rigidity of Sheared Columns of Hexapod Granules | Zhao, Yuchen; Barés, Jonathan; Socolar, Joshua | For small α, we observe a finite yield stress. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 587 | Chaotic particle dynamics above and below yield in a 2D jammed material | Galloway, Larry; Jerolmack, Doug; Arratia, Paulo | Here we present detailed quantification of Lagrangian properties (displacement lengths, arc-lengths, and enclosed area) of experimentally obtained particle trajectories for the purpose of illuminating where plasticity occurs in space and time both above and below yield. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 588 | The precursors to stick-slip events in sheared granular systems | Cheng, Chao; Basak, Rituparna; Kramar, Miroslav; Kondic, Lou | The purpose of our study is to explore the existence of precursors to slip events. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 589 | Jamming and tiling in fragmentation of rectangles | Ben-Naim, Eli; Krapivsky, Paul | We investigate a stochastic process where a rectangle breaks into smaller rectangles through a series of horizontal and vertical fragmentation events. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 590 | Contact breaking in packings of frictional disks | Chen, Yan; Wang, Philip; Wu, Qikai; Shattuck, Mark; O’Hern, Corey | We employ discrete element modeling simulations of the geometrical asperity or "bumpy particle" model to study the nonlinear vibrational response of jammed packings of frictional disks. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 591 | Modelling granular fragmentation in compacted systems | Clemmer, Joel; Bolintineanu, Dan; Lechman, Jeremy | We explore the compaction of brittle granular systems using large-scale discrete element simulations. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 592 | Electrostatic Attraction between Like-Charged Particles | Reggio, Benjamin; Tewari, Shubha | To more accurately model the origin of these attractive forces, we study the effective interaction between two dielectric spherical shells with like charge as a function of their size and charge ratios, and the dielectric constant of each. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 593 | Unforgettable random walks: forces and displacements distributions in granular systems. | Peshkov, Anton; Benson, Zackery; Richardson, Derek; Losert, Wolfgang | We show the latter to be a natural product of contacts that reign between particles. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 594 | Weakening, compaction and creep from vibration in sheared granular materials | Taylor, Stephanie; Clark, Abe; Brodsky, Emily | With laboratory experiments and discrete element method simulations, we show that low amplitude high frequency vibrations are capable of significantly reducing frictional resistance over a range of velocities in actively shearing systems. | Session 34: Granular Flows Beyond Simple Mechanical Models |
| 595 | Rheological and Electrical Percolation Behavior of Carbon Black Suspendedin Propylene Carbonate | Richards, Jeffrey; Hipp, Julie; Wagner, Norman | In this work, the microstructural origin of the rheo-electric behavior of carbon black gels and suspensions is studied. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 596 | Dielectric & Dynamic response of emergent hierarchical filler networks in polymer nanocomposites | Rishi, Kabir; Gogia, Ashish; Beaucage, Greg; Kuppa, Vikram; Tang, Anh | Dielectric & Dynamic response of emergent hierarchical filler networks in polymer nanocomposites | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 597 | Rheology and Shear-Induced Structural Evolution in Model Conductive Carbon Black Suspensions | Hipp, Julie; Richards, Jeffrey; Wagner, Norman | Rheology and Shear-Induced Structural Evolution in Model Conductive Carbon Black Suspensions | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 598 | Polyisoprene silica nanocomposites and its structure property relationship | Dhara, Deboleena; Jimenez, Andrew; Abbas, Zaid; Denn, Morton; Benicewicz, Brian; Kumar, Sanat | In this talk, we investigate the structure-property relationship of polymer grafted nanoparticles, where the grafted polymer provides a better control over the dispersion of the particles in a polymer matrix. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 599 | Microscopic Origins of Dynamic Mechanical Properties of Filled Rubber Investigated with X-ray Photon Correlation Spectroscopy | Presto, Dillon; Narayanan, Suresh; Meyer, Bryce; Meyerhofer, John; Moctezuma, Sergio; Sutton, Mark; Foster, Mark | We have used in-situ XPCS on styrene-butadiene rubber (SBR) filled with silicas of different surface chemistries under dynamic strain to probe the rearrangement of the filler network. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 600 | Probing dynamics and crosslink morphology of thermosets during cure via XPCS | Trigg, Edward; Koerner, Hilmar | A series of six epoxy systems are presented, wherein the ratio of two curing agents is systematically varied. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 601 | Influence of Graft Density on Dynamically Coupled Polymer Grafted Nanocomposites | Ehlers, Andrew; Akcora, Pinar; Ozisik, Rahmi | The PGN studied in the current work consists of a nanoparticle with grafted high-T g polymer chains in a low T g polymer matrix. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 602 | The emergence of quasi-sinusoidal nonlinearity in particle-filled polymer solutions | Xiong, Wentao; Wang, Xiaorong | The emergence of quasi-sinusoidal nonlinearity in particle-filled polymer solutions | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 603 | Single Particle Tracking of Sticky and Non-Sticky Nanoparticles in Polymer Melts | Park, Jinseok; Bailey, Eric; Composto, Russell; Winey, Karen | Single Particle Tracking of Sticky and Non-Sticky Nanoparticles in Polymer Melts | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 604 | A Coarse Grained Model for the Simulation of dynamic Properties of Filled Elastomers | Viktorova, Mariia; Hentschke, Reinhard; Karimi-Varzaneh, Hossein | We describe a modelling approach to the calculation of dynamic moduli of filled elastomers based on filler morphologies derived from the experimental interface tensions of the material’s components. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 605 | The influence of shear rate and adsorbed polymer chain flexibility on thermally stiffening nanocomposites | Gong, Chen; Akcora, Pinar; Ozisik, Rahmi | In the current study, a laboratory mixing extruder was used to process nanocomposites that were initially solution blended, as a function of shear rate and adsorbed polymer chemistry. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 606 | Understanding the Dispersion and Aggregation of fillers in Polymer Nanocomposites using Dissipative Particle Dynamics (DPD) Simulations of Polymer-Filler Blends | Gogia, Ashish; Rishi, Kabir; McGlasson, Alex; Beaucage, Greg; Kuppa, Vikram | In this research, we perform Dissipative Particle Dynamics (DPD) simulation of polymer chains with aggregated and free filler particles, varying polymer-polymer, filler-filler, and polymer-filler interaction energy, to understand the hierarchical structure and dispersion over multiple length and time-scales. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 607 | Polymer – nanocomposites at rest and under deformation: structure of the nanofillers, conformation of the chains, and related mechanical reinforcement. | Boué, François | We review work from Laboratory Léon Brillouin and associated groups, on the structure of polymer-nanoparticles composites, under deformation, in relation with mechanical properties improvement of plastics. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 608 | Quantification of dispersion for weakly and strongly correlated fillers in polymer nanocomposites | McGlasson, Alex; Rishi, Kabir; Beaucage, Greg; Chauby, Michael; Kuppa, Vikram | Quantification of dispersion for weakly and strongly correlated fillers in polymer nanocomposites | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 609 | Recent Study of Small-Angle Neutron Scattering Spectrometer Suanni on Elastomer Nanocomposites | Shui, Yue; Huang, Lizhao; Wang, Tingting; Sun, Guangai; Gong, Jian; Chen, Jie; Liu, Dong | In this report, we will discuss some applications on the polymeric materials. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 610 | Effect of Initial Dispersion State on the Structure and Property of Polymer Nanocomposites | Kim, Ga Young; Kim, So Youn | In this study, we show how the initial dispersion of the colloidal system can influence the final structure and property of the polymer nanocomposites. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 611 | Thermodynamic model for dispersion in nanocomposites. | Beaucage, Greg; Vogtt, Karsten; Rishi, Kabir; Jiang, Hanqiu; Mulderig, Andrew | This approach is demonstrated for three systems, pigments dispersed with nonionic surfactants; worm-like micelles; and condensation polymerization. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 612 | Scattering Studies on Hierarchically Self-Organized Filler Particles in Polymers | Takenaka, Mikihito; Nishitsuji, Shotaro; Hashimoto, Takeji | In this study, we investigated the self-organization of nanoparticles dispersed in polymer melts under applied mechanical energy imposed to mixtures that are composed of a bulk of the particle powder and a bulk of the polymer melt. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 613 | First principles Study of Interaction of Polymer Molecules with Flat Carbon Nanotubes | Sachdeva, Geeta; Pandey, Ravindra; Odegard, Gregory | In this talk, we present the results based on density functional theory for the composite consisted of epoxy/BMI resins and flat carbon nanotubes with an aim to provide atomistic description of the interface which determines the mechanical strength of the polymer composite. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 614 | Multiscale Modeling of Fracture in Epoxy/CNT Nanocomposites | Hollenbeck, Hayden; Wen, Chengyuan; Romero, Ralph; Ahmed, Tabassum; Genckal, Neslihan; Shirodkar, Nishant; Seidel, Gary; Cheng, Shengfeng | We have developed a multiscale modeling framework on the basis of coarse-grained molecular dynamics (CG-MD) simulations and peridynamics to study fracture initiation and propagation in epoxy/CNT nanocomposites. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 615 | Molecular Dynamics Investigation of the Structural and Mechanical Properties of Off-Stoichiometric Epoxy Resins | Jang, Chang Woon; Lawson, John | We found that the stiffness was associated with molecular packing caused by chemical cross-linking. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 616 | Deformation of Epoxy Nano-Composites | Ahuja, Suresh | Deformation of Epoxy Nano-Composites | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 617 | Effect of interface modifiers on the cure, mechanical and viscoelastic properties of hierarchical carbon nanotube composites. | Krishnamurthy, Ajay; Tao, Ran; An, Qi; Forster, Aaron | Here we aim to isolate the effect of PEI in the absence of CNTs and glass fibers and study its effect on the cure kinetics, mechanical properties and viscoelastic characteristics of the resin system. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 618 | Adhesion Strength of Block Copolymer Modified Epoxy Adhesives | Pang, Vincent; Thompson, Zachary; Joly, Guy; Bates, Frank; Francis, Lorraine | In this work, the influence of self-assembled BCP nanostructures on the adhesion strength of epoxy thermosets was evaluated. | Session 35: Hierarchical Structural Emergence in Elastomer Nanocomposites: Dispersion, Dynamics, Structure, Modeling, and Simulation |
| 619 | Optimal Signal Transduction with Silicon Transistors Enable Therapeutic Enzyme Regulation | Balijepalli, Arvind; Le, Son; Morris, Michelle; Pant, Harish; Richter, Curt | We used commercially sourced n-channel silicon field-effect transistors (nFETs) operating under PID control to demonstrate pH measurements with a resolution of (7.2±0.3)x10 -3 at 10 Hz. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 620 | Protein-Corona-by-Design in 2D: A Molecular Dynamics study to Decode Bio-Nano Interactions for Quality-by-Design Nanomedicines | Al-Badri, Mohamed Ali; al-Jamal, Khuloud; Lorenz, Christian | Here we investigate the interaction of graphitic materials with an array of proteins with all-atom molecular dynamics simulations and perform analytical modelling ito identify safe and toxic protein corona profiles in 2D that could pave the way for future quality by design 2D/3D nanomedicines & better clinical translation. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 621 | Single-Molecule Characterization of Nanoparticle Bioconjugates using Microwell Array Analysis | Abdul-Moqueet, Mohammad; Tovias, Leeana; Mayer, Kathryn | A need for characterizing these nanoparticle bioconjugates at the single-particle level using optical methods is needed. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 622 | Single-Molecule Kinetics of Taq Polymerase up to 94 °C | Turvey, Mackenzie; Lee, Wonbae; Taulbee, Jeffrey; Lau, Calvin; Gabriel, Kristin; Vargas, Rebecca; Weiss, Gregory; Collins, Philip | Our electronic biosensor approach provides direct access to single-nucleotide incorporation activity [2] from room temperature up to 94 °C. For example, the incorporation rate of a single Taq molecule was monitored from 1 bp/s at 22 °C to greater than 100 bp/s at 72 °C, the typical PCR operating temperature. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 623 | Monitoring Antipsychotic Drug Effects on Stimulated Dopamine Release Using Carbon Nanotube Transistors with Nafion-Radical Hybrid Films | Park, Inkyoung; Pham Ba, Viet Anh; Cho, Dong-guk; Hong, Seunghun | In this work, carbon nanotube field-effect transistors with floating electrodes were functionalized with nafion films containing 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS●) radicals to build selective biosensors for the dopamine detection. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 624 | Synthesis and toxicity of bio-templated fluorescent metal nanoclusters in human Neuro-2a cells | Karna, Shashi; Perry, Karima; Kumar, Raj; Gupta, Raj | Here we present the synthesis of Au and Fe nanoclusters synthesized in vitro using human neuro-2a cells. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 625 | Protein Aggregation Characterization by Nanopore technology | Li, Jiali | In this talk, we report our study on characterizing protein aggregation with a solid-state nanopore device, together with AFM and DLS techniques. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 626 | Active and stable palladium nano-thin-film structure development for rapid and direct biomolecules conjugation and sensing | Chang, Chia-Ching; Chang, Chia-Yu; Huang, Yun-Tzu; Chen, Wei | In this study, a PET substrate has been selected for metal atoms absorption and a stable and active Pd nano-thin-film (NTF) surface has been developed. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 627 | Spontaneous ssDNA Stretching on Graphene and Hexagonal Boron Nitride In-plane Heterostructures | Luan, Binquan | Given the significance of ssDNA stretching in genome analysis, here a novel ssDNA stretching platform is proposed: two dimensional in-plane heterostructure comprising graphene and hexagonal boron nitride (h-BN), and I show that ssDNA can be stretched on a h-BN nanostripe sandwiched between two adjacent graphene domains ("nanochannel”). | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 628 | Block Optical DNA Sequencing with Plasmonic Substrates for Rapid Biomarker Diagnostics | Korshoj, Lee; Prabhune, Ameya Gajanan; Nagpal, Prashant | In a push for improved precision diagnostics, we describe an optical sequencing platform that uses surface-enhanced Raman spectroscopy (SERS) measurements from plasmonic nanostructured surfaces and nanoparticles for label-free determination of nucleobase content in DNA k-mer blocks. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 629 | Dynamics of DNA in periodic temperature gradient field created by plasmonic heating | Shimada, Ryoko; Watanabe, Hiroshi | In this work, we utilized the plasmonic heating from periodic silver (Ag) domains under emission of blue light (400 – 440 nm) to create the periodic temperature gradient (with a large amplitude of ~ 0.5 K/um), thereby attempting to observe the Soret effect on DNA molecules mixed in polyethylene glycol (PEG) solutions. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 630 | Tunneling Spectroscopy on Engineered Surfaces for RNA Nucleotide and Structural Label Identification | Korshoj, Lee; Abel Jr., Gary; Chatterjee, Anushree; Nagpal, Prashant | We present a method for identification of RNA nucleotides and structural labels for mapping of single RNA molecules. | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 631 | Conformational heterogeneity in human interphase chromosome organization reconciles the FISH and Hi-C paradox | Shi, Guang; Thirumalai, Dave | Here, we show that the FISH-Hi-C paradox can be resolved using a theory based on a Generalized Rouse Model for Chromosomes (GRMC). | Session 36: Interrogating Biomolecules with Synthetic Nanostructures |
| 632 | Pressure-dependent shear response of jammed packings of frictionless, spherical particles | VanderWerf, Kyle; Boromand, Arman; Shattuck, Mark; O’Hern, Corey | Previous studies have shown that, at small pressure p, the ensemble-averaged static shear modulus < G- G 0> scales with p α, where α ≈ 1, but above a characteristic pressure p**, < G- G 0> scales with p β, where β ≈ 0.5. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 633 | Gardner physics in three-dimensional structural glasses | Scalliet, Camille; Berthier, Ludovic; Zamponi, Francesco | Based on mean-field results [1], we present a comprehensive numerical study of 3d glasses. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 634 | Dimensional Dependence of Scaling Prefactors in Overjammed Systems | Sartor, James; Corwin, Eric | We present measurements of these prefactors in dimensions 2-10. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 635 | Vibrational Properties of Hard and Soft Spheres are Unified at Jamming | Arceri, Francesco; Corwin, Eric | The study of the vibrational properties in hard spheres has proven to be challenging to measure numerically because no analytic interaction is defined. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 636 | Effect of annealing on the nature of the yielding transition of amorphous solids | Sastry, Srikanth; Bhaumik, Himangsu; Foffi, Giuseppe | We analyse the manner in which the discontinuous nature of the transition changes with annealing and compare our results with recent results analysing the effect of annealing in glasses [4]. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 637 | Universal non-mean-field scaling in the density of states of amorphous solids | Ikeda, Harukuni | We hereby provide a theoretical framework to describe this universal scaling behavior. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 638 | A jamming plane of sphere packings | Jin, Yuliang; Yoshino, Hajime | Here we show numerically that the phase space of frictionlessly jammed states can be extended from the well-known jamming-point along the density axis to a jamming plane spanned by the density and shear-strain axes,. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 639 | Out-of-equilibrium jamming of liquids and glasses: memory and criticality | Morse, Peter; Charbonneau, Patrick | In this talk, we present a new method to jam hard sphere liquids efficiently, which enables us to reliably detect this onset and relate its value with the mean-field prediction. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 640 | Creating ultra-stable jammed packings by training on pressure | Faghir Hagh, Varda; Corwin, Eric; Manning, M. Lisa; Liu, Andrea; Nagel, Sidney | Here, we train packings of soft harmonic spheres based on their per-particle pressures. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 641 | Intruder dynamics in granular flow | Newlon, Scott; Silbert, Leo | Intruder dynamics in granular flow | Session 37: Jamming, Criticality, and the Gardner Transition |
| 642 | One-step replica-symmetry-breaking phase in low-dimensional spin glasses | Hoeller, Judith; Read, Nicholas | It is long known that mean-field theory of an Ising spin glass predicts a second-order phase boundary in the temperature–magnetic field plane between a paramagnet and a replica-symmetry-breaking phase. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 643 | Origin of Two-Step Glass Transition in 2D Colloidal Suspension of Rods | Liu, Xinzhuo; Wang, Huaguang; Zhang, Zexin; Ling, Xinsheng | We report an experimental study of monolayers of colloidal rods which exhibits a two-step glass transition with no appearance of nematic domains. | Session 37: Jamming, Criticality, and the Gardner Transition |
| 644 | Kinetic theory of defect dynamics in active nematics | Marchetti, M Cristina | In this talk I will show that, focusing on the defects as the relevant quasiparticles driving the non-equilibrium dynamics, we can formulate a kinetic theory of the active defect gas and describe the onset of active turbulence as activity-driven defect unbinding. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 645 | Kinetic theory for financial Brownian motion: a microscopic model based on forex data analysis and its mean-field theory | Kanazawa, Kiyoshi | In this presentation, we will show our recent kinetic approach (K. Kanazawa et al., PRL 2018; PRE 2018) to financial Brownian motion in the context of high-frequency data analyses. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 646 | A generalization of the Glansdorff-Prigogine criterion for stability based on information geometry and thermodynamic uncertainty relationships | Ito, Sosuke | To consider the relationship between the excess entropy production and the Fisher information of time, we have generalized the Glansdorff-Prigogine criterion for stability. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 647 | Pattern Selection of Shallow Suspensions of Shrimp | Welsh, Andrea; Singal, Krishma; Velivela, Divya; Finch, Ellie; Barnhill, Michael; Fenton, Flavio | We discuss the three-dimensional patterns that can be observed in brine shrimp swarms, specifically of the Great Salt Lake strain of Artemia franciscana, at high concentration . | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 648 | Hydrodynamics of Active Lévy Matter | Cairoli, Andrea; Lee, Chiu Fan | Here, we formulate the hydrodynamic description of active Lévy matter by coarse-graining a microscopic model of alignment interacting active particles performing superdiffusion manifest as Lévy flights. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 649 | Towards a statistical mechanics of chiral active gases | Han, Ming; Fruchart, Michel; Scheibner, Colin; Vaikuntanathan, Suriyanarayanan; Irvine, William; De Pablo, Juan; Vitelli, Vincenzo | In this talk, we present the footprints of a statistical mechanical treatment of chiral active fluids composed of self-spinning particles. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 650 | Hydrodynamic memory and driven microparticle transport: hedging against fluctuating sources of energy | Seyler, Sean; Pressé, Steve | In this work, we numerically solve the BBO equation to simulate driven microparticles and show that hydrodynamic memory generally reduces transport friction, particularly when driving forces do not vary smoothly. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 651 | Cargo transport by dissipative solitons-director bullets in nematics | Li, Bingxiang; Xiao, Rui-Lin; Shiyanovskii, Sergij; Lavrentovich, Oleg | Here, we demonstrate that the bullets can be generated around colloidal spheres with both tangential and radial anchoring, dispersed in the nematic. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 652 | Brownian motion in confinement | Lavaud, Maxime; Soulard, Pierre; Bertin, Vincent; Dean, David; Sarfati, Raphael; Raphael, Elie; Louyer, Yann; Salez, Thomas; Amarouchene, yacine | Here, we study the diffusion of micrometer-sized beads in water confined between two walls that are separated by a micrometric distance. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 653 | Superdiffusion and diffusion in active matter using a stochastic field theory | Underhill, Patrick; Kramer, Peter | In this talk, we will describe our new approach which uses a stochastic field to overcome the limitations of the mean field assumption. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 654 | Disordered hyperuniform state of circularly swimming algae | Huang, Mingji; Hu, Wensi; Yang, Siyuan; Liu, Quan-Xing; Zhang, Hepeng | Here we show that density fluctuations in active system can be greatly suppressed. | Session 38: Kinetic Theory and Its Applications in the Physical, Biological and Social Sciences |
| 655 | Network Centrality of Heterogeneous Elastomers for Describing Mechanical Property | Amamoto, Yoshifumi; Kojio, Ken; Takahara, Atsushi; Masubuchi, Yuichi; Ohnishi, Takaaki | We found that the end-to-end distance increased with increasing the network centrality. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 656 | Understanding aggregation and growth in a cross-linked polymer film | Curk, Tine; Luijten, Erik | To understand this degradation process, we propose a theoretical model combining existing models of nucleation and growth, as well as Ostwald ripening, with the elasticity and creep behavior of cross-linked polymers. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 657 | Influence of particle softness on the flow properties of colloidal dispersions: A comparison of regularly and ultra-low-crosslinked microgels | Lopez, Carlos; Scotti, Andrea; Brugnoni, Monia; Bochenek, Steffen; Crassous, Jerome; Richtering, Walter | We compare the flow properties of different PNIPAM microgels: regularly crosslinked and ultra-low crosslinked (ULC) microgels. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 658 | Electrostatics and Rheology of Unentangled Semidilute Polyelectrolyte Solutions | Chen, Guang; Perazzo, Antonio; Stone, Howard | Classical scaling theory suggests that the viscosity η for salt-free semidilute unentangled PE solutions in Θ solvents obeys the empirical Fuoss law η∼c 1/2 in the higher polymer concentration (c) regime, and η∼c 5/4 in the lower c regime. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 659 | Patterned fluorescence photobleaching recovery on multicomponent sodium polystyrene sulfonate solutions to investigate temporal aggregrate formation. | Balding, Paul; Russo, Paul; Borrelli, Rachel | Patterned fluorescence photobleaching recovery on multicomponent sodium polystyrene sulfonate solutions to investigate temporal aggregrate formation. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 660 | Simulating Surface-Grafted Polymers in Solvent Mixtures: Effects of Cononsolvency | Zong, Jing; Meng, Dong | In this study, we first reinforce such claim by showing that a coarse-grained soft model frequently used in studying polymers is able to reproduce the reentrant transition at the single-chain level, provided that solvents are treated explicitly. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 661 | Humidity- and surfactant-accelerated aging in poly(vinyl alcohol)-based thin films | Majerczak, Katarzyna; Zhang, Zhenyu | This work aims to understand how relative humidity (RH) and chemical composition influence the diffusion of guest molecules in formulated polymer films replicating packaging materials for detergent products. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 662 | Polydispersity Correction to the Order-Disorder Transition of Symmetric Diblock Copolymers Melts | Willis, James; Matsen, Mark | We find that polydispersity reduces (χN) ODT for large Ñ, but increases (χN) ODT for small Ñ. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 663 | Thermodynamics of Binding of Charged Dendrimers to Graphene: Simulation and Theory | Gosika, Mounika; Sen, Swati; Kundagrami, Arindam; Maiti, Prabal | Thermodynamics of Binding of Charged Dendrimers to Graphene: Simulation and Theory | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 664 | Complex Viscosity of Helical and Doubly Helical Polymeric Liquids from General Rigid Bead-Rod Theory | Piette, Jourdain; Giacomin, A. Jeffrey; Kanso, Mona | In this paper, we use general rigid-bead rod theory for the most complex macromolecular architectures to date. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 665 | The tail free discotic liquid crystal 1,2,3,4,7-pentrafluoro triphenylene: a study in structural variations | Powers, Mitch; Ellman, Brett; Portman, John; Li, Zhe; Wang, Kunlun; Guragain, Parikshit; Twieg, Robert; Bunge, Scott; Sharpnack, Lewis; Agra-Kooijman, Dena Mae; Kumar, Satyendra | In this contribution, we describe a tail free discotic liquid crystal 1,2,3,4,7-pentafluorotriphenylene (7F-TFT). | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 666 | Effects of Boundary Conditions and Alignment Methods on Liquid Crystal Performance in Microwave Devices | Nobles, Jason; Melnyk, Olha; Glushchenko, Anatoliy; Camley, Robert; Celinski, Zbigniew | As part of this effort, we are investigating a variety of the techniques used to control the initial state of the liquid crystal in a device to determine the optimum method to use with this emerging microwave technology. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 667 | Fast Water Transport in Polyelectrolyte Brush Functionalized Nanochannels | SIVASANKAR, VISHAL SANKAR; Etha, Sai Ankit; Sachar, Harnoor; Das, Siddhartha | In this study, we show that the functionalization of nanochannel with pH-responsive polyelectrolyte (PE) brushes, which we model using newly formulated augmented Strong Stretching theory, can lead to fast electroosmotic (EOS) transport of water. | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 668 | Mechanisms of Surfactant Adsorption and Interfacial Tension Lowering for Enhanced Oil Recovery (EOR) Applications | Chung, Jaeyub; Boudouris, Bryan; Franses, Elias | We have discovered that there are two types of relevant equilibrium IFTs (EIFTs). | Session 39: Kinetics and Aggregation of Polymers in Complex Fluids and Geometries |
| 669 | Coarse-grained theory for motion of solitons and skyrmions | Long, Cheng; Selinger, Jonathan | To understand the magnitude and direction of the induced motion, we develop a coarse-grained approach to describe dynamics of skyrmions, similar to our group’s previous work on the dynamics of disclinations [2]. | Session 40: Liquid Crystals: Fields and Interfaces |
| 670 | Energy dependence of resonant x-ray scattering for the twist bend nematic phase, a helix of liquid crystals | Cao, Yu; Feng, Jun; Nallapaneni, Asritha; Arakawa, Yuki; Zhao, Keqing; Liu, Feng; Zhu, Chenhui | We examined the manifestation of resonance effects in twist bend nematic (NTB), smectic A (SmA) and crystalline phases via tender resonant X-ray scattering (TReXS) at sulfur K-edge. | Session 40: Liquid Crystals: Fields and Interfaces |
| 671 | Behavior of Superparamagnetic Microbeads in Smectic Films | Bamidele, Emmanuel; Chen, Xi; Durm, Jackson; Park, Cheol; MacLennan, Joseph; Clark, Noel | We investigate the behaviour and magnetic response of superparamagnetic, silica-coated iron oxide microbeads embedded in freely suspended films of the smectic A liquid crystal 8CB. | Session 40: Liquid Crystals: Fields and Interfaces |
| 672 | Dynamics of magnetically induced defect walls in Nematic Lenses | Karaszi, Zoltan; Rahmani, Haumed; Kenderesi, Viktor; Salamon, Peter; Buka, Agnes; Jakli, Antal | We studied nematic liquid crystal (NLC) droplets with lens-shaped free surface placed on solid substrates under magnetic field applied parallel to the solid substrate. | Session 40: Liquid Crystals: Fields and Interfaces |
| 673 | Dynamic pattern generation of topological defect arrays in nematic liquid crystals | Kim, MinSu; Serra, Francesca | [1] Here we create tunable patterns of topological defect arrays in nematic liquid crystals (LCs) that can be simply controlled by electrical waveforms. | Session 40: Liquid Crystals: Fields and Interfaces |
| 674 | Elongation of Tactoids in the presence of an electric field | Safdari, Mohammadamin; Van der Schoot, Paul; Zandi, Roya | We explain this by extending the Oseen-Frank elastic model of Kaznacheev et al. [1] and Prinsen et al. [2] to partially bipolar tactoids and evaluate the level of elongation of the tactoids as a function of the surface tension, elastic constants, volume, and electric field strength. | Session 40: Liquid Crystals: Fields and Interfaces |
| 675 | Observation of Ferroelectricity in a Thermotropic Nematic Liquid Crystal Using its Spectacular Electro-Optics | Chen, Xi; Korblova, Eva; Shao, Renfan; Radzihovsky, Leo; Glaser, Matthew; MacLennan, Joseph; Walba, David; Clark, Noel | We have synthesized and studied the literature compound RM734 [1], a polar rod shaped molecule exhibiting a typical nematic phase and a second nematic phase assigned to be a "splay nematic" state [2]. | Session 40: Liquid Crystals: Fields and Interfaces |
| 676 | Ferromagnetic Fréedericksz transition in ferromagnetic nematic filaments | Shuai, Min; Chen, Xi; Cobasko, Nathan; MacLennan, Joseph; Glaser, Matthew; Clark, Noel | We have discovered a rich variety of ferromagnetic structures, such as droplets, toroids, and filaments, which form in the isotropic background when the concentration of the nanoplates is within the isotropic-nematic phase coexistence region. | Session 40: Liquid Crystals: Fields and Interfaces |
| 677 | Electrostatically controlled surface boundary conditions in hybrid molecular-colloidal liquid crystals | Mundoor, Haridas; Senyuk, Bohdan; Almansouri, Mahmoud; Park, Sungoh; Fleury, Blaise; Wensink, Henricus; Smalyukh, Ivan | We study the influence of surface charge and ions on surface anchoring properties, with a focus on defining the behavior of anisotropic colloids dispersed in a nematic LC. | Session 40: Liquid Crystals: Fields and Interfaces |
| 678 | Cellulose Nanocrystal well alignment with addition magnetic nanoplates in weak gradient magnetic field | chen, mingfeng; Cheng, Zhengdong; Huang, Dali | Based on these, we establish a method to control the phase separation speed and the position of nematic phase, since the movement of nematic phase depends on the competition of magnetic and gravity field. | Session 40: Liquid Crystals: Fields and Interfaces |
| 679 | Application of monolayer WSe2 as the planar-alignment agent in an electro-optic liquid crystal device | Basu, Rajratan; Atwood, Lukas | Application of monolayer WSe2 as the planar-alignment agent in an electro-optic liquid crystal device | Session 40: Liquid Crystals: Fields and Interfaces |
| 680 | Topographical variations in thin liquid crystal films | Atherton, Tim; Ferris, Andrew; Rosenblatt, Charles | We present analytical and numerical theory for several surface patterns, which are compared with our experimental actualizations. | Session 40: Liquid Crystals: Fields and Interfaces |
| 681 | Microscopic look at mesogen interactions with two-dimensional nanosheets | Brown, Paul; Fischer, Sean; Kolacz, Jakub; Spillmann, Christopher; Gunlycke, Daniel | In this talk, we use density functional theory to focus on the microscopic origins of recent observations where liquid crystals are combined with two-dimensional nanosheets. | Session 40: Liquid Crystals: Fields and Interfaces |
| 682 | Nucleation and Growth of BPII Liquid Crystals on Chemically Patterned Surfaces: A Surface Anchoring Assisted BPII-Coherence Length | Li, Xiao; Park, Kangho; Martínez-González, jose; Guzman, Orlando; De Pablo, Juan; Nealey, Paul | Here, we report how to measure the correlation length of blue-phases (BPs), which are chiral liquid crystals with long-range 3D-crystalline structures and submicron-sized lattice-parameters. | Session 40: Liquid Crystals: Fields and Interfaces |
| 683 | Theory of the splay nematic phase | Rosseto, Michely; Selinger, Jonathan | Following that reasoning, we propose a structure with a 2D splay modulation of the director field, accompanied by a 2D modulation of polar order, and show that the 2D structure generally has a lower free energy than the 1D structure. | Session 41: Liquid Crystals: Phases and Transitions |
| 684 | Twisted topological defect lines in achiral nematic liquid crystal confined in glass capillaries | Zheng, Zhaofei; Velez, Jose; Beller, Daniel; Serra, Francesca | Here we report that common nonchiral thermotropic liquid crystals confined in square capillary tubes with homeotropic anchoring can show a spontaneous twist during the phase transition from smectic-A to nematic. | Session 41: Liquid Crystals: Phases and Transitions |
| 685 | Phase Transition Triggering in a Liquid Crystal Droplet | Shechter, Jake; Canas, Noe; Zhang, Rui; Mozaffari, Ali; Strain, Benjamin; Oster, Linda; Chahar, Manisha; De Pablo, Juan; Thayumanavan, S.; Ross, Jennifer | We observe a hysteresis in the SDS concentration that induces the phase transition from radial to bipolar and back as well as a fluctuation in state when the phase transition starts. | Session 41: Liquid Crystals: Phases and Transitions |
| 686 | Nanoparticle Network embedded polymer films formed using liquid crystal transition templating. | Wheeler, Alauna; Hirst, Linda | In this study we demonstrate that hollow networks of self-assembled nanoparticles can be formed in different nematic LC mixtures, compatible with polymerization. | Session 41: Liquid Crystals: Phases and Transitions |
| 687 | One pot synthesis of hollow colloidal gel | GIREESAN SUDHA, DEVIKA; Ochoa Hernandez, Jocelyn; Hirst, Linda | Here we present structural analysis using confocal and fluorescence imaging of these gels for a range of capsule sizes. | Session 41: Liquid Crystals: Phases and Transitions |
| 688 | Intertwined spontaneous helix formation in achiral bent-core liquid crystals | Martinez, Vikina; Green, Adam; Park, Cheol; Glaser, Matthew; MacLennan, Joseph; Clark, Noel | In the PAL29, the n=16 homolog, we have confirmed, using both resonant and non-resonant x-ray diffraction, as well as electro-optical methods, the existence of a phase with intertwined helices, similar to the structure recently reported by Salamonczyk and co-workers [2]. | Session 41: Liquid Crystals: Phases and Transitions |
| 689 | Transformations Between Different Self-Organized Defect Arrays at the Nematic-Smectic A Phase Transition | Beller, Daniel; Suh, Ahram; Gim, Min-Jun; Yoon, Dong Ki | We model transformations in self-organized liquid crystal defect arrays in hybrid-aligned thin films at the nematic-smectic A phase transition. | Session 41: Liquid Crystals: Phases and Transitions |
| 690 | Investigation of Thermal Properties of Itraconazole at Ultra-Fast Rates | Zapata-Hincapie, John; Pallaka, Madhusudhan Reddy; Simon, Sindee | Investigation of Thermal Properties of Itraconazole at Ultra-Fast Rates | Session 41: Liquid Crystals: Phases and Transitions |
| 691 | Coalescence Dynamics of Fluids in Two Dimensions: Merging of Islands in Freely-Suspended Smectic Films | Nguyen, Duong; Harth, Kirsten; Goldfain, Aaron; Park, Cheol; MacLennan, Joseph; Glaser, Matthew; Clark, Noel | Coalescence Dynamics of Fluids in Two Dimensions: Merging of Islands in Freely-Suspended Smectic Films | Session 41: Liquid Crystals: Phases and Transitions |
| 692 | Phase behavior and elastic response of liquid crystal mixtures in atomistic models | Shi, Jiale; Sidky, Hythem; Whitmer, Jonathan | Here, we apply advanced sampling methods in atomistic models to study both the phase behavior and elastic response of liquid crystal mixture. | Session 41: Liquid Crystals: Phases and Transitions |
| 693 | Macroscopic sheets of negative order parameter Liquid Crystal Elastomer with high dissipation and auxetic properties | Mistry, Devesh; Volpe, Ross; Traugutt, Nicholas; Yakacki, Christopher | [5] However, here we create NOP LCEs via the biaxial straining of polydomain LCEs. | Session 41: Liquid Crystals: Phases and Transitions |
| 694 | Oligomeric odd–even effect in liquid crystals. | Saha, Rony; Babakhanova, Greta; Parsouzi A.Sh, Zeinab; Rajabi, Mojtaba; Gyawali, Prabesh; Welch, Chris; Mehl, Georg H.; Gleeson, James; Lavrentovich, Oleg; Sprunt, Samuel; Jakli, Antal | In this work, we unveil multiple signatures of a new odd–even effect in liquid crystals that occurs at the larger scale of molecular moieties that by themselves express liquid crystalline behavior. | Session 41: Liquid Crystals: Phases and Transitions |
| 695 | Relative orientation of defects in smectic-C films | Tang, Xingzhou; Selinger, Jonathan | We find that the theory with elastic anisotropy gives good agreement with the experiment, and hence can describe the effects of defect orientation. | Session 41: Liquid Crystals: Phases and Transitions |
| 696 | Tying knots in liquid crystals | Tai, Jung-Shen; Smalyukh, Ivan | Here we present energetically stable, micrometer-sized knots in the chiral background of liquid crystals. | Session 41: Liquid Crystals: Phases and Transitions |
| 697 | Computational model of a Maier-Saupe field theory for nematic liquid crystals | Schimming, Cody; Vinals, Jorge | We develop a computational model based on a field theory extension of the Maier-Saupe molecular model of a uniaxial, nematic liquid crystal. | Session 41: Liquid Crystals: Phases and Transitions |
| 698 | Learning the onset of frictional motion | Bar-Sinai, Yohai | I will show that, in a well-controlled laboratory setup with detailed interfacial measurements, relatively simple linear models can explain much of the observed variance, indicating that a significant portion of the uncertainty is non-stochastic and is encoded in the frictional interface. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 699 | Detecting Depinning and Nonequilibrium Transitions with Unsupervised Machine Learning | McDermott, Danielle; Reichhardt, Cynthia; Reichhardt, Charles | Using numerical simulations of a model disk system, we demonstrate that a machine learning generated order parameter can detect depinning transitions and different dynamic flow phases in systems driven far from equilibrium. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 700 | Machine Learning and Benchtop Experiments | Rubinstein, Shmuel | In this talk, I will address our approach to these questions, sharing our attempts to leverage lab models of complex systems for this study. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 701 | Supervised Autoencoder for Inverse Kirigami Design | Hanakata, Paul; Cubuk, Ekin; Campbell, David; Park, Harold | Recently, machine learning (ML) methods have shown successes in predicting mechanical properties of composite materials as a forward solver. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 702 | Softness Correlations in Low-Temperature Supercooled Liquids | Chacko, Rahul; Landes, François; Biroli, Giulio; Dauchot, Olivier; Liu, Andrea; Reichman, David | This can be quantified using a machine learning approach, yielding a linear model mapping local structure to "softness", a quantity that predicts the propensity of a particle to rearrange [3]. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 703 | Data-driven inference of thermodynamic properties from non-equilibrium stochastic fluctuations | Jung, Yoon; Li, Junang; Fakhri, Nikta | Here, we present a data-driven approach for inferring system properties based on scattering transforms. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 704 | Inverse learning of material physics through in-situ image data and continuum modeling | Zhao, Hongbo; Storey, Brian; Braatz, Richard; Bazant, Martin | Using a framework of PDE-constrained optimization, we demonstrate that multiple constitutive relations can be extracted simultaneously from a small set of images of pattern formation. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 705 | Using Machine Learning to analyze Defect Annihilation Dynamics in Smectic C films | Glaser, Matthew; Minor, Eric; Howard, Stian; Green, Adam; Park, Cheol; Clark, Noel | We demonstrate a method for training a convolutional neural network with simulated images for usage in the study of topological defect annihilation in freely-suspended SmC liquid crystal films. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 706 | Experimental Realization of Reservoir Computing with Wave Chaotic Systems | Ma, Shukai; Antonsen, Thomas; Ott, Edward; Chandra, Sarthak; Anlage, Steven | We propose unique techniques to create virtual RC nodes by both frequency stirring and spatial perturbation. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 707 | Chaotic source separation solved by a tank of water through invertible generalized synchronization | Lu, Zhixin; Kim, Jason; Bassett, Danielle | From the perspective of dynamical systems, we propose a supervised learning framework that can solve this problem through an intermediate dynamical system. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 708 | The Dependence of Reservoir Computing on System Parameters | Pecora, Louis; Carroll, Thomas | We examined several aspects of RC using fitting and prediction of signals as a benchmark. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 709 | Reduced network extremal ensemble learning (RenEEL) scheme for community detection in complex networks | Bassler, Kevin; Guo, Jiahao; Singh, Pramesh | We introduce an ensemble learning scheme for community detection in complex networks. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 710 | Visualizing statistical models in Minkowski space: an analytical coordinate embedding | Teoh, Han Kheng; Quinn, Katherine; Clement, Colin; Kent-Dobias, Jaron; Xu, Qingyang; Sethna, James | Dimensionality reduction techniques are often used to provide a lower dimensional description of high dimensional data. | Session 42: Machine Learning in Nonlinear Physics and Mechanics |
| 711 | Protein condensates as aging Maxwell fluids | Jawerth, Louise | Here, we present our efforts to quantify these new materials as they age in vitro. | Session 43: Macromolecular Phase Separation in Biology |
| 712 | Surface Fluctuations and Coalescence of Nucleolar Droplets in the Human Cell Nucleus | Caragine, Christina; Haley, Shannon; Zidovska, Alexandra | Our study presents a noninvasive approach, using natural probes to investigate material properties of the cell as well as to understand the physical interactions between nucleoli and chromatin solution [1,3]. | Session 43: Macromolecular Phase Separation in Biology |
| 713 | Phase separation in the nucleus is limited by chromatin mechanics | Zhang, Yaojun; Lee, Daniel; Meir, Yigal; Brangwynne, Cliff; Wingreen, Ned | Here, we combine coarse-grained molecular dynamics simulations and theory of liquid-liquid phase separation to show that mechanical interactions with chromatin can constrain the size of droplets in the nucleus. | Session 43: Macromolecular Phase Separation in Biology |
| 714 | Subdiffusive Dynamics of Optogenetic Droplets Report on Local Chromatin Mechanics | Lee, Daniel; Shimobayashi, Shunsuke; Chang, Yi-Che; Strom, Amy; Wingreen, Ned; Brangwynne, Cliff | Here, we show that droplet growth dynamics are directly inhibited by chromatin. | Session 43: Macromolecular Phase Separation in Biology |
| 715 | Converting Stochastic Assembly into an Assembly Line: Non-Equilibrium Droplet Dynamics Assists Ribosome Formation | Harmon, Tyler; Julicher, Frank | We show numerically and analytically that the binding of specific rProteins to rRNA can be localized within a well-defined radial shell inside the nucleolus instead of being homogeneously distributed. | Session 43: Macromolecular Phase Separation in Biology |
| 716 | Reentrant Liquid Condensation of Ribonucleoprotein–RNA Complexes | Raju, Muralikrishna; Laghmach, Rabia; Potoyan, Davit | Using an archetypal disordered RNP, fused in sarcoma (FUS), here we employ atomistic simulations to study how RNA, a primary component of RNP granules, can modulate the phase behavior of RNPs by controlling both droplet assembly and dissolution. | Session 43: Macromolecular Phase Separation in Biology |
| 717 | Size selection of phase-separated liquid droplets in strain-stiffening elastic networks | Mao, Sheng; Haataja, Mikko; Kosmrlj, Andrej | Motivated by these observations, we developed a model to investigate the coupling between the separating liquid mixture and the elastic network. | Session 43: Macromolecular Phase Separation in Biology |
| 718 | A hydrodynamic instability drives TPX2 protein droplet formation on microtubules and leads to branching microtubule nucleation | Setru, Sagar; Gouveia, Bernardo; Alfaro-Aco, Raymundo; King, Matthew; Stone, Howard; Shaevitz, Joshua; Petry, Sabine | Using atomic force microscopy, fluorescence imaging, electron microscopy, and hydrodynamic theory, we show that the dynamics of liquid TPX2 are crucial for nucleating branched microtubules. | Session 43: Macromolecular Phase Separation in Biology |
| 719 | Motif Sequences and Intracellular Phase Separation | Weiner, Benjamin; Meir, Yigal; Wingreen, Ned | We propose a statistical physics model of IDPs to elucidate the relationship between motif sequence, the phase boundary, and the partitioning of proteins between phases. | Session 43: Macromolecular Phase Separation in Biology |
| 720 | Coupling signaling cascades to membrane criticality | Schaffner, Taylor; Machta, Benjamin | In order to create a theory that explains the interplay between signaling cascades and membrane criticality, here we present a model and Monte-Carlo simulation framework for proteins coupled to their surrounding lipid membrane using a 2D Ising model. | Session 43: Macromolecular Phase Separation in Biology |
| 721 | Wetting of Critical Membranes by Protein Droplets | Rouches, Mason; Veatch, Sarah; Machta, Benjamin | Here, we consider the underlying thermodynamics of this interaction, constructing a minimal Landau theory describing the wetting of protein droplets to a near-critical membrane. | Session 43: Macromolecular Phase Separation in Biology |
| 722 | Probing the Dynamics of Optically Induced Protein Droplets with Single-Walled Carbon Nanotubes | Higinbotham, Hugh; Coupe, Sebastian; Jung, Yoon; Fakhri, Nikta | Here, we use single-walled carbon nanotubes (SWNTs), which fluoresce in the near infrared and are photostable, to probe the local environment of optically induced protein droplets in vivo. | Session 43: Macromolecular Phase Separation in Biology |
| 723 | Measuring protein concentrations in biomolecular condensates via quantitative phase microscopy | McCall, Patrick; Kim, Kyoohyun; Wang, Jie; Fritsch, Anatol; Poznyakovskiy, Andrey; Diederich, Benedict; Kreysing, Moritz; Heintzmann, Rainer; Guck, Jochen; Alberti, Simon; Brugués, Jan; Hyman, Anthony | To address these, we use quantitative phase microscopy and optical diffraction tomography to measure the refractive index of model condensates, from which the protein concentration may be inferred. | Session 43: Macromolecular Phase Separation in Biology |
| 724 | Pollen cell walls form from modulated phases | Radja, Asja; Sweeney, Alison; Lavrentovich, Maxim | We formulated a Landau-Ginzburg free energy description of this process in which we treat the primexine concentration as a scalar field coupled to the cell membrane and calculated the equilibrium states. | Session 43: Macromolecular Phase Separation in Biology |
| 725 | Designing morphology of separated phases in multicomponent liquid mixtures | Chakraverti-Wuerthwein, Milena; Mao, Sheng; Gaudio, Hunter; Haataja, Mikko; Kosmrlj, Andrej | We developed a novel method based on graphs that enabled us to enumerate all topologically distinct morphologies of separated phases. | Session 43: Macromolecular Phase Separation in Biology |
| 726 | Microscopic Model of a Biological Condensate | Htun, Swan; Chou, Han-Yi; Sarthak, Kumar; Aksimentiev, Aleksei | Using existing structural and biochemical information, we constructed a coarse-grained model of the FUS protein. | Session 43: Macromolecular Phase Separation in Biology |
| 727 | Microstructure in biological phase transition | Bhandari, Kamal; Schmit, Jeremy | Since the condensed phase has a low density, we propose that molecules are highly aligned to form zipper structures. | Session 43: Macromolecular Phase Separation in Biology |
| 728 | Experimental determination of binodal compositions of protein and peptide solutions | Filippidi, Emmanouela; Julicher, Frank; Hyman, Anthony | We will present quantitative measurements of both branches of the binodal curves of the phase diagrams obtained via quantitative phase imaging microscopy for the protein FUS and simpler peptide sequences. | Session 43: Macromolecular Phase Separation in Biology |
| 729 | Spinodal Dynamics in Non-Equilibrium Compression of Two Self-Avoiding Polymer Chains | Zeng, Lili; Seyboldt, Rabea; Liu, Zezhou; Capaldi, Xavier; Khorshid, Ahmed; Francois, Paul; Provatas, Nikolas; Reisner, Walter | We interpret this phenomenon as a spinodal decomposition of the two polymers and rationalize it using a model based on a 1D convective Cahn-Hilliard equation, a classic model describing spinodal decomposition in driven binary systems. | Session 43: Macromolecular Phase Separation in Biology |
| 730 | Relating chemical and physical properties controlling oligonucleotide polyelectrolyte complex phase separation | Marras, Alexander; Vieregg, Jeffrey; Lueckheide, Michael; Tirrell, Matthew | Here, we present an investigation of the impact of physical and chemical properties of each polyelectrolyte on complex and micelle assembly. | Session 43: Macromolecular Phase Separation in Biology |
| 731 | Entropic localization of plasmids in nanofluidic compartments | Liu, Zezhou; Capaldi, Xavier; Zeng, Lili; Lamothe, Rodrigo; Reisner, Walter | Here, we present a nanofluidic device with compartments simulating the confinement induced by a cell membrane. | Session 43: Macromolecular Phase Separation in Biology |
| 732 | Computational Insights into Phase Separation of Multivalent Polymers | Zumbro, Emiko; Alexander-Katz, Alfredo | In this work we compare phase separation of multivalent polymers through non-specific Van der Waals interactions to phase separation through specific reactive-binding interactions. | Session 43: Macromolecular Phase Separation in Biology |
| 733 | Stable drops: the Gibbs-Thomson condition and drop dynamics | Rutenberg, Andrew; Cameron, Samuel | This talk addresses three questions for systems with small stable droplets: how does the Gibbs-Thomson condition generalize, how does Lifshitz-Slyozov-Wagner dynamics generalize, and how much of this should apply when stable drops arise from non-equilibrium processes? | Session 43: Macromolecular Phase Separation in Biology |
| 734 | Simulation Informed Thermodynamic Model for Polyampholyte Self-Coacervation with Heterogeneous Charge Distribution | Madinya, Jason; Sing, Charles | In this work we present a coarse-grained simulation model to resolve phase separation in polyampholytes with any arbitrary charge sequence. | Session 43: Macromolecular Phase Separation in Biology |
| 735 | Nematic transition and liquid-liquid phase separation in semiflexible polymers – nanoparticle mixtures | Roy, Supriya; Chen, Yeng-Long | In the present study, we used GPU-accelerated Langevin dynamics simulation to explore how polymer-NP interaction affect the isotropic-nematic (I-N) transition and microstructural modifications of a matrix of semi-flexible polymers with persistence length P=20 and contour length L=25. | Session 43: Macromolecular Phase Separation in Biology |
| 736 | Valence and Patterning of Aromatic Residues Determine the Phase Behavior of Disordered Prion-Like Domains | Holehouse, Alex; Martin, Erik; Peran, Ivan; Pappu, Rohit; Mittag, Tanja | Here, we use multipronged biophysical approaches that integrates across simulation, experiment, and theory to address this question and uncover the physical principles underlying how an archetypal PLD derived from hnRNPA1 avoids aggregation in favor of LLPS. | Session 43: Macromolecular Phase Separation in Biology |
| 737 | A Random Heteropolymer Model of Protein Aggregation | Falk, Martin; Triandafillou, Catherine; Murugan, Arvind | In this context, the phenomenon of protein aggregation is a particularly appealing subject of study. | Session 43: Macromolecular Phase Separation in Biology |
| 738 | Actin(g) on phase separation | Wiegand, Tina; Hyman, Anthony; Grill, Stephan | Our aim is to recapitulate the complex spectrum of kinetic behaviors observed for actomyosin in vivo. | Session 43: Macromolecular Phase Separation in Biology |
| 739 | Elasticity dominated small molecule migration in polymer mixtures and gels | Chakrabarti, Buddhapriya; Mukherjee, Biswaroop | We report a simultaneous phase separation and surface migration phenomena in oligomer-polymer and oligomer-gel systems following a temperature quench. | Session 43: Macromolecular Phase Separation in Biology |
| 740 | Looped liquid-liquid coexistence in protein crystallization | Glaser, Jens; Glotzer, Sharon | Here we report liquid-liquid phase separation (LLPS) with a highly asymmetric coexistence region in a computational model of rubredoxin with real molecular shape. | Session 43: Macromolecular Phase Separation in Biology |
| 741 | Intermolecular association of the variable domain of dynamin related protein 1 in crowding conditions suggests a role in dynamin assembly | Harden, James; Posey, Ammon; Bagheri, Mehran; Harwig, Megan; Kennedy, Nolan W.; Hilser, Vincent; Hill, R. Blake | This talk focuses on the behaviour of isolated VD from Drp1 isoform 1. | Session 43: Macromolecular Phase Separation in Biology |
| 742 | Model for intrinsically disordered proteins with a strong dependence of liquid-liquid phase separation on sequence | Statt, Antonia; Casademunt, Helena; Brangwynne, Cliff; Panagiotopoulos, Athanassios | In this talk, we present the phase separation behavior of different sequences of a coarse-grained model for intrinsically disordered proteins and show that they exhibit a surprisingly rich phase behavior. | Session 43: Macromolecular Phase Separation in Biology |
| 743 | Quantitative droplet FRAP based on physical principles | Hubatsch, Lars; Jawerth, Louise; Hyman, Anthony; Weber, Christoph | This results in the following improvements: we can (i) distinguish the time scales of exchange through the droplet interface (set by bulk diffusion and boundary kinetics) from diffusion inside the droplet, (ii) quantify the impact of the interface (iii) provide improved measurements for several biologically important proteins, and (iv) use our analysis framework to explore several multi-component scenarios. | Session 43: Macromolecular Phase Separation in Biology |
| 744 | Probing ATPase Dependent Physical Properties of Biological Condensates | Coupe, Sebastian; Jung, Yoon; Fakhri, Nikta | In studying how this model condensate system responds to base-pairing RNAs, ATP, and accessory proteins we will shed light on principles underlying energetic regulation of condensate fluidity. | Session 43: Macromolecular Phase Separation in Biology |
| 745 | The robust bioinformatic analysis of the protein sequences with phase behavior | Badaczewska-Dawid, Aleksandra Elzbieta; Potoyan, Davit | The long-term goal of our research is the creation of a publically accessible database that would be used by both experimentalists for designing controlled mutations and for computationally-oriented scientists for developing new modeling tools. | Session 43: Macromolecular Phase Separation in Biology |
| 746 | Effects of protein charge and charge patterning on complex coacervation for enzymatic microreactors | Zervoudis, Nicholas; Obermeyer, Allie | Effects of protein charge and charge patterning on complex coacervation for enzymatic microreactors | Session 43: Macromolecular Phase Separation in Biology |
| 747 | The role of a hidden ordered domain in controlling the material properties of RNA-protein condensates | Seim, Ian; Klotsa, Daphne; Gladfelter, Amy | By mutating specific residues in the CC, we demonstrate a range of material states in vitro, characterized by kinetic mean-field modeling of condensate formation. | Session 43: Macromolecular Phase Separation in Biology |
| 748 | The nematic feedback between cancer cells and the extracellular matrix | Sun, Bo | In this talk I will first discuss quantitative measurements of cellular response to 3D contact guidance cues, which are inevitiblly noisy and spatially heterogeneous. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 749 | Mechanical regulation of shape deformation by matrix viscoelasticity in breast tissues | Elosegui-Artola, Alberto; Gupta, Anupam; Mahadevan, L; Mooney, David | In this study, we are further looking into the role of such mechanical properties in inducing the malignant phenotype in normal mammary epithelium MCF10A cell line. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 750 | Why do rigid tumors contain soft cancer cells? | Fuhs, Thomas; Wetzel, Franziska; Fritsch, Anatol; Bi, Dapeng; Stange, Roland; Pawlizak, Steve; Kiessling, Tobias; Morawetz, Erik; Grosser, Steffen; Sauer, Frank; Lippoldt, Jürgen; Renner, Fred; Friebe, Sabrina; Zink, Mareike; Horn, Lars-Christian; Aktas, Bahriye; Bendrat, Klaus; Oktay, Maja; Niendorf, Axel; Condeelis, John; Höckel, Michael; Marchetti, M Cristina; Manning, M. Lisa; Kaes, Josef | We investigate primary samples from patients with mammary and cervical carcinomas on multiple length scales from tissue level down to single cells. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 751 | A tug of war between cell-cell and cell-ECM interaction during tumor invasion | Huang, Yu Ling; Dey, Sumit; Shiau, Carina; Wu, Cindy; Ma, Yujie; Segall, Jeffrey; Wu, MingMing | In this talk, we will present a newly developed 3D tumor model in which tumor spheroids were embedded within collagen matrix, and tumor cell dynamics are subsequently imaged and analyzed. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 752 | Understanding the crosstalk between mechanical and chemical guidance in 3D cell migration | Esfahani, Pedram; Eddy, Christopher; Kim, Jihan; Wong, Ryan; Sun, Bo | In our continuing work, we will develop a mathematical model to recapitulate our experimental observations and fully characterize the cell response to coupled chemical and mechanical cues. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 753 | The role of tissue biophysics in organ selectivity in metastasis | Tanner, Kandice | Here I discuss using optical tweezer based active microrheology to measure the mechanical cues that may influence disseminated tumor cells in different organ microenvironments. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 754 | Distinct Roles of Tumor-Associated Mutations in Collective Cell Migration | Lee, Rachel; Vitolo, Michele; Losert, Wolfgang; Martin, Stuart | By using cells with controlled mutations, we show that Ras activation and PTEN deletion lead to opposing effects on collective migration, despite both mutations being frequently found in patient tumors. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 755 | Precision of flow sensing by self-communicating cells | Vennettilli, Michael; Fancher, Sean; Hilgert, Nicholas; Mugler, Andrew | Here we derive the precision of flow sensing for two ubiquitous mechanisms: absorption of the chemical and binding/unbinding to surface receptors. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 756 | Classification of healthy and cancerous cells using optical rheology and machine learning | Morawetz, Erik; Tschodu, Dimitrij; Kaes, Josef | We use the high throughput of the OS to perform machine learning based discrimination of individual cells with a breast cancer model. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 757 | Modeling biophysical tumor-stroma interactions in 3D co-cultures of pancreatic cancer cells and pancreatic stellate cells | Struth, Eric; Celli, Jonathan | Going forward, we are leveraging this system to model and study drug delivery through fibrotic PDAC stroma and evaluate stromal depletion therapies. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 758 | Quantifying ECM micromechanical remodeling by an invading tumor | Naylor, Austin; McIntyre, David; Sun, Bo | We find that the tumor can introduce strong mechanical anisotropy as well as stiffen the ECM. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 759 | Force generation and self-organization in mitosis | Betterton, Meredith | This talk will discuss how force is generated by motors, crosslinkers, and chromosomes over time during mitosis to correctly assemble the spindle. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 760 | Intrinsic time-scales of active forces control the dynamics of soft living matter | Gradziuk, Grzegorz; Torregrosa Cortés, Gabriel; Broedersz, Chase | Living cells are crowded with active agents which consume energy and perform work on their surrounding environment, constantly keeping the system out of thermodynamic equilibrium. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 761 | Mechanical properties of intermediate filament networks under compression | Carroll, Bobby; Gandikota, Mahesh Chandrasekhar; Elbalasy, Iman; Schnauss, Joerg; Kas, Josef; Schwarz, Jennifer; Patteson, Alison | Here, we study the mechanical response of reconstituted polymer networks comprised of the intermediate filament proteins vimentin and keratin using a parallel-plate rheometer. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 762 | Cytoskeletal Regulation of Three-Dimensional Epithelial Cell Shape | Chmiel, Theresa; Gardel, Margaret | By examining the relationship between cell height, density and biological components of the actin cytoskeleton, we explore the mechanisms by which epithelial cells regulate shape and volume. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 763 | Physical limits to sensing material properties | Beroz, Farzan; Zhou, Di; Mao, Xiaoming; Lubensky, David | In this talk, I will present the limits to the precision of such constitutional sensing for sensors embedded in disordered media. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 764 | Cell shape as a window into cell state | Prasad, Ashok | Using these we show that quantifiers of cell shape and cytoskeletal texture can be used to discriminate between different cell states. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 765 | The Morphodynamics of 3D Migrating Cancer Cells | Eddy, Christopher; Wong, Ryan; Sun, Bo | Here, we physically characterize morphodynamics (the temporal fluctuations of cell shape) rather than real-space migration alone. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 766 | Switching between optimum substrate rigidity and focal adhesion reinforcement at the cell leading edge | De, Partho Sakha; De, Rumi | We have developed a theoretical model for the dynamics at the leading edge of a cell placed on a viscoelastic substrate, involving a pair of coupled reaction-diffusion equations. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 767 | Mechanics of endocytosis under large osmotic pressure | Ma, Rui; Berro, Julien | In this talk, I will discuss membrane deformations powered by a point force under the condition of high pressure and low tension, which is rarely studied but directly relevant for endocytosis in yeast cells with a cell wall. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 768 | Plasticity in vertex model of epithelial tissues | Popovic, Marko; Druelle, Valentin; Wyart, Matthieu | Motivated by this question in this work we study plastic properties of vertex model of epithelial tissues, in which mechanical properties of cells are prescribed and emerging tissue mechanics is obtained from their collective behaviour. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 769 | Loops versus lines and the compression stiffening of cells | Gandikota, Mahesh Chandrasekhar; Pogoda, Katarzyna; van Oosten, Anne; Engstrom, Tyler; Patteson, Alison; Janmey, Paul; Schwarz, Jennifer | We find for the fiber network with area-conserving loops model that the stress-strain curves are sensitive to the packing fraction and size distribution of the area-conserving loops, thereby creating a mechanical fingerprint across different cell types. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 770 | Vimentin intermediate filament biomechanics in 3D cell motility | Patteson, Alison | We propose a minimal model in which a perinuclear vimentin cage constricts along with the nucleus during motility through confining spaces, providing mechanical resistance against large strains that can damage the structural integrity of cells and their nuclei. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 771 | Confined cell migration – a dynamical systems perspective | Brückner, David; Fink, Alexandra; Schmitt, Matthew; Arlt, Nicolas; Rädler, Joachim; Broedersz, Chase | To provide such a framework, we employ a data-driven approach to infer the dynamics of cell movement, morphology and interactions of cells confined in two-state micropatterns. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 772 | Finite element simulation of a cell entering a pipette: Effects of large deformation and frictional contact | Sun, Xiaohao; Wang, Ke; Wu, HengAn; Chen, Jian; Long, Rong | Here we present a simulation approach that can continuously update the boundary condition according to the contact status as the cell enters the channel, thus enabling more accurate description of the pressure and frictional conditions. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 773 | Modeling the effect of vimentin on confined cell motility. | Gupta, Sarthak; Patteson, Alison; Schwarz, Jennifer | We have developed a biophysical model for a cell moving through various confined geometries based on Brownian dynamics. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 774 | Regulation of nuclear architecture, mechanics, and nucleocytoplasmic shuttling of epigenetic factors by cell geometric constraints | Alisafaei, Farid; Jokhun, Doorgesh Sharma; Shivashankar, GV; Shenoy, Vivek | To elucidate the physical mechanisms involved in this regulation, we developed an active 3D chemomechanical model to describe the three-way feedback between the adhesions, the cytoskeleton, and the nucleus. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 775 | Effective pressure in a dense cell monolayer and collective cell migration | Khain, Evgeniy | For a non-uniform system, I will consider the cell shift due to the gradient of the effective pressure and examine its effect on the average cell area profiles. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 776 | Effects of cell-cell adhesion on collective migration of multicellular clusters | Roy, Ushasi; Mugler, Andrew | We develop both a minimal framework based on the lattice gas model of statistical physics, as well as a more realistic framework based on the cellular Potts model. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 777 | Plasticity of cell migration resulting from mechanochemical coupling | Ghabache, Elisabeth; Cao, Yuansheng; Rappel, Wouter-Jan | We find that a sufficient decrease of the protrusion force can destabilize keratocyte-like cells, resulting in cells that employ amoeboid-like migration. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 778 | Collective Cell Migration in Wound Healing | Vazquez, Kelly; Notbohm, Jacob | Collective Cell Migration in Wound Healing | Session 44: Mechanics of Cells and Tissues Across Scales |
| 779 | Traction dynamics in collective cell migration | Saraswathibhatla, Aashrith | Recent theoretical models have emphasized cell motility force as a key driver of collective cell migration. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 780 | How does extracellular matrix rigidity affect the fluidity of an embedded spheroid? | Parker, Amanda; Marchetti, M Cristina; Manning, M. Lisa; Schwarz, J | Using a computational model, we explore how a simple mechanical interaction between a spheroid and its ECM promotes changes in the spheroid’s rigidity, morphology and the shapes of its constituent cells, as well as the ECM’s rigidity and structure. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 781 | Self-organized vasculogenesis in 3D printed mixed cell populations | Ellison, Sarah; Angelini, Thomas | Preliminary data and analysis will be presented. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 782 | Interrogating collagen mechanics at the single-molecule level | Forde, Nancy | I’ll describe what we have learned about collagen’s flexibility and stress response, how local sequence context matters, and how our work resolves some of the many contentious findings regarding collagen’s mechanics. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 783 | Mechanical response of the vitreous gel in our eyes: Results from an inhomogeneous two-fluid model | Lwin, Pancy; Franklin, Scott; Thurston, George; Ross, David; Das, Moumita | We study rheological properties of this gel by simulating it as a two-fluid model made of an inhomogeneous polymer network interacting with a fluid. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 784 | Kinetics of Cell Adhesion Through Biomimetic Glycocalyx | Jing, Yu; Cohen, Shlomi; Faubel, Jessica; Curtis, Jennifer | We introduce a biomimetic glycocalyx platform to investigate the kinetics of cell adhesion in the presence of sugar-rich interfaces. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 785 | Length regulation of epithelial cell junctions | Staddon, Michael; Cavanaugh, Kate; Munro, Edwin; Gardel, Margaret; Banerjee, Shiladitya | We propose a new theory for epithelial tissue mechanics that highlights two essential properties of intercellular junctions. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 786 | Fast Confined Dynamics in Lipid Bilayers | Gupta, Sudipta | We have investigated the molecular dynamics of complex phospholipid membranes in their fluid phases by neutron spin echo spectroscopy. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 787 | In vitro characterization and numerical simulations of red blood cell transmigration through splenic inter-endothelial slits | Garcia de Herreros, Antoni; Lu, Huijie; Peng, Zhangli; Del Alamo, Juan | To study the mechanics of RBC splenic filtration, we designed and characterized a family of microfluidic devices where a suspension of human RBCs flows through an array of channels of controlled length (L), width (W) and height (H). | Session 44: Mechanics of Cells and Tissues Across Scales |
| 788 | Nucleation and Formation of a Primary Clot in Insect Blood Probed by Magnetic Rotational Spectroscopy | Kornev, Konstantin; Aprelev, Pavel; Adler, Peter; Brasovs, Artis | Using larvae of Manduca sexta, we discovered that clot nucleation is a two-step process whereby cell aggregation is the time-limiting step followed by rigidification of the aggregate. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 789 | Microfluidic platform for label-free viability cell sorting | Chrit, Fatima Ezahra; Raj, Abhishek; Stone, Nick; Sulchek, Todd; Alexeev, Alexander | We propose a biophysical approach for cell viability sensing, enumeration, and purification that is label-free and continuous. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 790 | Simultaneous Measurement of Electrical and Mechanical Properties of Biological Cells Using a Tuning Fork-Coupled Conductive Probe | Schiller, Mark; Ivanov, Alexandra; Maci, Megi; Pontrelli, Eva; Merlo, Juan; Connolly, Timothy; Naughton, Michael | We have devised a conductive tip tuning fork probe, which is intended to simultaneously measure mechanical properties and membrane potential of a cell. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 791 | Brain Mechanics Drive Cavitation and Fracture Response | Dougan, Carey; Galarza, Sualyneth; Barney, Christopher; zheng, yue; Cai, Shengqiang; Crosby, Alfred; Peyton, Shelly | By understanding the strain rate deformation of specific areas of the brain, we aim to gain further insight into how cavitation-related events lead to irreversible damage. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 792 | Rheological properties of cellular aggregates formed by pilus mediated interactions | Kuan, Hui-Shun; Julicher, Frank; Zaburdaev, Vasily | Motivated by colonies of Neisseria gonorrhoeae bacteria, we develop a continuum theory to study cellular aggregates formed by attractive pulis mediated intercellular interactions. | Session 44: Mechanics of Cells and Tissues Across Scales |
| 793 | Optical tweezer application with Autofocusing Airy-Bessel beams | Liang, Yi; Xiang, Yinxiao; Shi, Fan | We proposed a new autofocusing beams named autofocusing Airy-Bessel beams (AABB). | Session 44: Mechanics of Cells and Tissues Across Scales |
| 794 | Controlled neighbor exchanges drive intermittency and cell streaming in epithelial tissues | Das, Amit; Bi, Dapeng | Here we introduce this important biological constraint in a vertex-based model as an intrinsic single-cell property and study how this rate-limiting process affects the mechanics and collective behavior of cells in a tissue. | Session 45: Mechanics of cells and tissues across scales |
| 795 | Mechanical Instabilities in Growing Biological Systems: Wrinkling and Branching | Kosmrlj, Andrej | In this talk I will focus on mechanical instabilities that cause the wrinkling of Vibrio cholerae bacterial biofilms and branching in developing lungs. | Session 45: Mechanics of cells and tissues across scales |
| 796 | Quasi-realistic modelling of expanding epithelial cell monolayer | Deng, Youyuan; Levine, Herbert | We propose a quasi-realistic model for this phenomenon. | Session 45: Mechanics of cells and tissues across scales |
| 797 | Symmetry breaking and axis formation in Hydra | Collins, Eva-Maria | In my talk, I will present our recent work that answers some of these questions. | Session 45: Mechanics of cells and tissues across scales |
| 798 | Configurations and dynamics of membrane-bound elastic filaments | Lough, Wilson | We discuss the mechanics of surface-bound filaments and present a collection of analytical and numerical results. | Session 45: Mechanics of cells and tissues across scales |
| 799 | Bacteria sense and respond to the mechanics of the surface to which they attach | Gordon, Vernita; Wang, Liyun; Blacutt, Jacob | Here, we examine the relationship between substrate stiffness, mechanical deformation of the bacterial cell, accumulation of bacteria on the surface, and dynamics of an intracellular signal that control biofilms development. | Session 45: Mechanics of cells and tissues across scales |
| 800 | Mechanical impacts of complex topology on epithelial cells | Yu, Sun-Min; Li, Bo; Amblard, francois; Granick, Steve; Cho, Yoon-Kyoung | In the current study, we found that strong mechanical impacts of complex topology on the epithelial system. | Session 45: Mechanics of cells and tissues across scales |
| 801 | Three-dimensional Packing of Curved Epithelia: Biology and Topology meet Physics | Gómez-Gálvez, Pedro; Vicente Munuera, Pablo; Anbari, Samira; Escudero, Luis M; Buceta Fernandez, Javier | Here we address this problem using a combination of experiments, mathematical analyses, computer simulations, and biophysical approaches. | Session 45: Mechanics of cells and tissues across scales |
| 802 | Topological analysis of multicellular structures | Skinner, Dominic; Song, Boya; Dunkel, Jörn | In this talk we introduce a topological distance between materials that needs only the coordinates of the centroid of each discrete object, and is based on the local graph structure around each centroid. | Session 45: Mechanics of cells and tissues across scales |
| 803 | Tissue-Tissue Interactions at Boundaries of Colliding Monolayers | Heinrich, Matthew; Cohen, Daniel; Kosmrlj, Andrej; Strain, Jake | Classic ‘wound healing’ studies in epithelial monolayers use a wound or barrier removal to induce and study collective migration, focusing on the migration rather than the ultimate collision and tissue healing. | Session 45: Mechanics of cells and tissues across scales |
| 804 | Patterning Potential of Cell-cell signalling Molecules in Flowing Tissue | BAJPAI, SUPRIYA; Inamdar, Mandar; Prabhakar, Ranganathan; Chelakkot, Raghunath | We present a model which accounts for contact signalling between adjacent cells and between non-adjacent neighbours through long protrusions that occur along the direction of cell polarization. | Session 45: Mechanics of cells and tissues across scales |
| 805 | A super-swelled lamellar lipid system | Rueben, Jacob; Steer, Dylan; Leal, Cecilia | Here we report a simple lipid system of low-bending-rigidity lipid doped with small amounts of charged lipid that forms a previously undocumented super-swelled lamellar phase with layer spacings upwards of 80 nm at low dilution. | Session 46: Membranes, Micelles, and Vesicles |
| 806 | Characterization of phospholipid monolayer viscoelasticity using microbubble acoustic radiation force | Upadhyay, Awaneesh; Supponen, Outi; Guidi, Francesco; Vos, Hendrik; Tortoli, Pero; Borden, Mark | Here, we demonstrate a method using multi-gate spectral Doppler with an open source ultrasound scanner to measure the acoustic radiation force displacements of individual resonant MBs as we scan a frequency range between 3 and 7 MHz. | Session 46: Membranes, Micelles, and Vesicles |
| 807 | Tuning the microstructure of phospholipid monolayers using substrate curvature | Barakat, Joseph; Squires, Todd | In this work, I will discuss how continuum-level theory can predict the effect of curvature on the phase behavior of lipid monolayers, using planar and spherical geometries as model templates. | Session 46: Membranes, Micelles, and Vesicles |
| 808 | Molecular dynamics study on encapsulation of ibuprofen and indomethacin in Triton X-100 micelles | Ishkhanyan, Hrachya; Barlow, Dave; Lorenz, Christian | In this study, drug encapsulation capabilities of a non-ionic surfactant Triton X-100 were studied using molecular dynamics (MD) simulations. | Session 46: Membranes, Micelles, and Vesicles |
| 809 | Faceted Shapes of Cooled Emulsion Droplets of CTAB and Hexadecane | Hashim, Abdullah; Dhakal, Subas | In 1 (CTAB): 1(Hexadecane) solutions, we find that the average droplet size scales as~C 0.4 with the concentration of Hexadecane (C). | Session 46: Membranes, Micelles, and Vesicles |
| 810 | Pore Formation: How Cubic Lipid-siRNA Constructs Escape the Endosome | Zheng, Lining; Leal, Cecilia | In this work, we aim to elucidate the reason behind this difference in delivery efficiency. | Session 46: Membranes, Micelles, and Vesicles |
| 811 | Osmotic Shrinking of Vesicles Embedded in Hydrogels | Rigby, Natasha; Staykova, Margarita | We propose that the observed membrane shapes are caused by a non-specific adhesion between the membrane lipids and the agarose gel matrix. | Session 46: Membranes, Micelles, and Vesicles |
| 812 | Mechanically mediated interactions between solid domains in composite vesicles | Wu, Hao; Santore, Maria; Grason, Gregory | We explore the structure and interactions of fluid/solid composite vesicles using continuum models compared with experimental studies of phase-separated two-component vesicles. | Session 46: Membranes, Micelles, and Vesicles |
| 813 | Biomimetic Lung Surfactant Nanodrops for Acoustic Droplet Vaporization | Thomas, Alec; Borden, Mark | Here we show that interfacial melting and spreading by lung surfactant during surface dilation can be harnessed to increase the echogenicity and stability of post-ADV microbubbles. | Session 46: Membranes, Micelles, and Vesicles |
| 814 | Microsecond Coarse-Grained MD Simulations of Beta-Amyloid Fibrils Binding to Phase Separated Lipid Raft Domains Reveal Diverse Membrane-bounded Conformations and Binding Kinetics of Protein Depending on the Fibril size and Lipid Domain Structure | Cheng, Kwan; Cheng, Sara; Cao, Yiyi; Rouzbehani, M; Davenport-Dendy, Ronald; Urby, A; Spurlock, S | We have constructed 4 coarse-grained (CG) beta-amyloid fibrils, ranging from dimer to pentamer, and 5 phase-separated CG lipid rafts, containing phospholipid and cholesterol or tail- or headgroup modified cholesterol. | Session 46: Membranes, Micelles, and Vesicles |
| 815 | An implicit lipid model to simulate reaction-diffusion of proteins binding to membrane surface | FU, YIBEN | Here we present an algorithm for reversible binding of proteins to continuum surfaces with implicit lipids, providing dramatic speed-ups to many body simulations. | Session 46: Membranes, Micelles, and Vesicles |
| 816 | Relationship among Phase Behavior, Micellar Structure and Thin Film Drainage in Aqueous Surfactant Solutions | Gao, Shang; Ochoa, Chrystian; Sharma, Vivek; Srivastava, Samanvaya | In this presentation, we will discuss experimental methodologies to elucidate surfactant phase behavior and self-assembly microstructure through a combination of small-angle X-ray scattering and cryoelectron microscopy. | Session 46: Membranes, Micelles, and Vesicles |
| 817 | Molecular Assembly of Surfactant Mixtures in Oil-Swollen Micelles: Implications for High Salinity Colloidal Stability | Chen, Hsieh; Gizzatov, Ayrat; Abdel-Fattah, Amr | Here, using experiments and atomistic molecular dynamics simulations, we demonstrated that the high salinity colloidal stability of alkylbenzene sulfonates can be dramatically increased by mixing with zwitterionic co-surfactants in oil-swollen micelles. | Session 46: Membranes, Micelles, and Vesicles |
| 818 | Global Memory From Local Hysteresis and Disorder in a Jammed Solid | Keim, Nathan; Hass, Jacob; Kroger, Brian; Wieker, Devin | Using experiments with particles at an oil-water interface, we show that this memory arises from the hysteresis of particles’ rearrangements within the material. | Session 47: Memory Formation in Matter: From Reading the Past to Designing the Future |
| 819 | Memory formation in cyclically deformed glasses | Sastry, Srikanth; Adhikari, Monoj; Mungan, Muhittin; Regev, Ido; Dahmen, Karin | Memory formation in cyclically deformed glasses | Session 47: Memory Formation in Matter: From Reading the Past to Designing the Future |
| 820 | Memories in a jar | Zeravcic, Zorana | In this talk I will discuss examples of memories modeled as structures made of DNA coated colloidal particles. | Session 47: Memory Formation in Matter: From Reading the Past to Designing the Future |
| 821 | Directed aging: Training elastic responses in disordered systems | Pashine, Nidhi | Our goal is to find out what range of behaviors can be achieved by directed-aging protocols. | Session 47: Memory Formation in Matter: From Reading the Past to Designing the Future |
| 822 | Wetting and dewetting of nanoscale films of nematic liquid crystal | Cummings, Linda; Kondic, Lou; Lam, Michael; Mema, Ensela | We present a simplified thin-film model for the free surface evolution that includes strong spatially-varying planar anchoring at the substrate, and weak antagonistic anchoring at the free surface. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 823 | A phase-field model for a modulated-disordered interface with varying density | Vitral, Eduardo; Leo, Perry; Vinals, Jorge | We derive a phase-field model that accounts for a varying density field and represents the smectic layering by an order parameter. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 824 | Non-reciprocal motion in superparamagnetic magnetoelastic membrane patches | Brisbois, Chase; Tasinkevych, Mykola; Olvera De La Cruz, Monica | We develop a theoretical approach for autonomous locomotion of superparamagnetic membranes through viscous media. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 825 | Particle motion nearby rough surfaces | Kurzthaler, Christina; Pahlavan, Amir; Zhu, Lailai; Stone, Howard | Here, we study the hydrodynamic couplings between particles and solid, rough boundaries that are characterized by periodic and random surface shapes. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 826 | Growth of clogs in parallel microchannels | Dressaire, Emilie; Villermaux, Emmanuel; Sauret, Alban | We present an analytical description that captures the time evolution of the volume of the aggregates. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 827 | Flow and Fouling in Elastic Membrane Filters with Complex Pore Morphology | Sanaei, Pejman; Liu, Shi Yue; Chen, Zhengyi | In this work, we consider standard blocking as a fouling mechanism, which decreases membrane porosity. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 828 | Hydrodynamic shock and instability in sedimenting colloidal suspensions along a surface | Karapetyan, Shake; Wilken, Sam; Tanaka, Michio; Sprinkle, Brennan; Donev, Aleksandar; Chaikin, Paul | We combine experiments, large-scale simulations, and a continuum model to study the emergence of a coherent density profile in a suspension of passive particles sedimenting near an inclined plane. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 829 | Unsteady Sedimentation of a Colloidal Sphere in a Horizontal Channel | Altman, Lauren; Grier, David | We investigate the limits of the Oseen superposition approximation in this canonical system by measuring the trajectories of colloidal spheres sedimenting through water in slit pores. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 830 | Stresslet of colloidal suspensions in a spherical cavity | Gonzalez Gonzalez, Emma del Carmen; Zia, Roseanna | Here we present the exact solution for stresslet hydrodynamic functions of a colloid in a spherical cavity, and its application to more concentrated suspensions via the Confined Stokesian dynamics algorithm. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 831 | Shape induced segregation and anomalous diffusion of particles under confinement | Li, Jiyuan; Singh, Abhinendra; Jiang, Xikai; Hernandez-Ortiz, Juan; De Pablo, Juan; Jaeger, Heinrich | We find that increasing the fraction of cylinders induces particle segregation, where the spherical particles are pushed towards the wall, while the cylinders prefer to be near the center of the cavity. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 832 | Equilibrium diffusion, thermodynamics, and rheology of confined Brownian suspensions | Sunol, Alp; Zia, Roseanna | Here, we present the results of our dynamic simulation studies using both Confined Stokesian Dynamics and Confined Brownian Dynamics algorithms. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 833 | Auto-phoretic nanorods driven up the wall by gravity | Brosseau, Quentin; Balboa Usabiaga, Florencio; Lushi, Enkeleida; Wu, Yang; Ristroph, Leif; Ward, Michael; Shelley, Michael; Zhang, Jun | Here we study the gravitaxis of heavy self-electrophoretic Janus nanorods that move upwards on a steeply inclined substrate. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 834 | When microrollers meet anisotropy | van der Wee, Ernest; Kotni, Ramakrishna; van Blaaderen, Alfons; Driscoll, Michelle | Here we study a system in which these collective interactions are largely driven by hydrodynamics: microrollers. | Session 48: Microflows Meet Soft Matter: Crystals, Colloids, & Particles |
| 835 | Viscous flows with thin, compliant boundaries | Vella, Dominic | I will give examples of some of these unusual behaviours, focussing on situations in which the compliant boundary is in some sense thin, as well as discussing the validity of the different models of boundary compliance. | Session 49: Microflows Meet Soft Matter: Deformation |
| 836 | Slicing Soft Materials | Rhodes, Steven; Weeks, Eric | We experimentally study the slicing of soft materials. | Session 49: Microflows Meet Soft Matter: Deformation |
| 837 | Valve Elasticity for Optimal Lymphatic Pumping | Wolf, Ki; Dixon, J. Brandon; Alexeev, Alexander | We use fully coupled, three-dimensional fluid-structure interaction model to study the performance of compliant lymphatic valves in the lymphatic vessel that undergoes peristaltic motion. | Session 49: Microflows Meet Soft Matter: Deformation |
| 838 | Soft hydraulics: Theory of flow in deformable microchannels | Anand, Vishal; Christov, Ivan; Shidhore, Tanmay; Wang, Xiaojia | We propose a perturbative approach to solving soft hydraulics problems. | Session 49: Microflows Meet Soft Matter: Deformation |
| 839 | Devising and characterizing a non-perturbative manipulator in 3D microfluidic channels | Gonzalez, Jeremias; Liu, Bin | Here, we investigate the capability of such non-perturbative manipulations in a microscope-compatible 3D microfluidic device having vertically offset channels converging on a middle chamber. | Session 49: Microflows Meet Soft Matter: Deformation |
| 840 | The interaction of elastomeric coatings with viscous flows: how incompressible is PDMS? | Chandler, Thomas; Vella, Dominic | We will present a model for thin, near-incompressible elastic foundations, and discuss how its application to examples of fluid-structure interaction problems at low Reynolds number can depend sensitively on how incompressible the coating is. | Session 49: Microflows Meet Soft Matter: Deformation |
| 841 | Active Foam: Connecting Structure, Dynamics and Control | Kroo, Laurel; Bull, Matthew; Prakash, Manu | The goal of this work is to understand fundamental principles of confluent tissues and develop functional synthetic analogs. | Session 49: Microflows Meet Soft Matter: Deformation |
| 842 | Active sieving : from flapping nano-doors to vibrating nanotubes | Marbach, Sophie; Dean, David; Bocquet, Lyderic | Here we investigate alternative approaches to separation and filtration. | Session 49: Microflows Meet Soft Matter: Deformation |
| 843 | Fibre-reinforced microfluidic droplets | Elettro, Herve; Gallaire, Francois | Fibre-reinforced microfluidic droplets | Session 49: Microflows Meet Soft Matter: Deformation |
| 844 | Pulp friction: lubricating properties of soft particle suspensions | Dijksman, Joshua; Rudge, Raisa; Scholten, Elke | The suspension lubrication deviates from typical Stribeck behavior as we find four frictional flow regimes. | Session 49: Microflows Meet Soft Matter: Deformation |
| 845 | Propagation and interactions of hydraulic fractures in model heterogeneous solids | Aime, Stefano; Weitz, David | In this work we study the propagation of hydraulic fractures in model, well-controlled colloidal materials, using microfluidics coupled to an innovative dynamic light scattering technique providing time- and space-resolved information on the local strain and the microstructural damage caused in the material by the propagating crack. | Session 49: Microflows Meet Soft Matter: Deformation |
| 846 | Effect of the 3D swelling of microgels on their 2D phase behavior at the liquid-liquid interface | Bochenek, Steffen; Scotti, Andrea; Isa, Lucio; Richtering, Walter | We investigate soft, temperature-sensitive microgels at fluid interfaces and how changing temperature across the microgels’ volume phase transition temperature, which leads to swelling/deswelling of the microgels in the aqueous phase, affects the phase behavior within the monolayer. | Session 49: Microflows Meet Soft Matter: Deformation |
| 847 | Underactuated fluidic control of continuous multistable structures | Peretz, Ofek; Mishra, Anand; Shepherd, Robert; Gat, Amir | This work addresses the challenge of underactuated pattern generation in continuous multistable structures. | Session 49: Microflows Meet Soft Matter: Deformation |
| 848 | Evidence for heterogeneous bulk melting dominating the transition of organic stable glasses | Gonzalez-Silveira, Marta; Vila-Costa, Ana; Rodríguez-Lopez, Marta; Lopeandía, Aitor; Rodriguez-Viejo, Javier | The low stability of conventional glasses, obtained by cooling down a melted material, have determined for years how we study glass dynamics, focused basically on the aging regime, i.e., performing isothermal treatments below the limiting fictive temperature (T f) of the glass, allowing the glass to evolve towards a more stable configuration. | Session 50: Molecular and Polymer Glass Dynamics |
| 849 | Solvent vapor annealing of stable glasses | Govind, Shivajee; Zhao, Haoqiang; Walsh, Patrick; Fakhraai, Zahra | We have introduced a novel and indirect method of measuring the dynamics of SG using solvent vapor annealing (SVA). | Session 50: Molecular and Polymer Glass Dynamics |
| 850 | Secondary Dynamics in Ultrastable Polystyrene Thin Films Studied by β-NMR | McKenzie, Iain; Cordoni-Jordan, Danaan; Fujimoto, Derek; Karner, Victoria; Kiefl, Robert; Levy, Philip; MacFarlane, W; McFadden, Ryan; Morris, Gerald; Pearson, Matt; Raegen, Adam; Ticknor, John; Forrest, James | We have used β-NMR to study the temperature dependence of the secondary γ-relaxation process in an ultrastable PS film and a normal PS film that was produced by rejuvenating an ultrastable film by heating to T g+25 K for 2 minutes. | Session 50: Molecular and Polymer Glass Dynamics |
| 851 | Uncovering β-relaxations in amorphous phase-change materials | Wei, Shuai; Peng, Si-Xu; Cheng, Yudong; Pries, Julian; Yu, Hai-Bin; Wuttig, Matthias | Here, instead of bulk samples, we use powder mechanical spectroscopy for powder samples to detect the prominent excess wings – a characteristic feature of β-relaxations – in a series of amorphous PCMs at temperatures below the glass transition. | Session 50: Molecular and Polymer Glass Dynamics |
| 852 | A direct static scattering evidence on the dynamic nature of glass formation process in polystyrene | Cheng, He; Jiao, Guisheng; Zuo, Taisen; Ma, Changli; Han, Zehua; Zhang, Junrong; Zhao, Junpeng; Han, Charles | A direct static scattering evidence on the dynamic nature of glass formation process in polystyrene | Session 50: Molecular and Polymer Glass Dynamics |
| 853 | Effects of aromatic side-group structure on thermal transitions of polyzwitterions | Clark, Andrew; Biswas, Yajnaseni; Asatekin, Ayse; Taylor, Morgan; Panzer, Matthew; Schick, Christoph; Cebe, Peggy | In this study we are using fast scanning calorimetry to investigate how aromatic structures in the side-group alters the glass formation of polyzwitterions. | Session 50: Molecular and Polymer Glass Dynamics |
| 854 | Rigorous analysis of the linear viscoelastic behavior of thermo-rheologically complex amorphous materials | Medvedev, Grigori; Caruthers, James | We propose a different approach where all processes have the same strength, but the corresponding relaxation times are dictated by the data. | Session 50: Molecular and Polymer Glass Dynamics |
| 855 | Relaxation processes in polymer glasses: a hierarchical approach | Olmsted, Peter; Baker, Daniel; Reynolds, Matthew; Mattsson, Johan; Masurel, Robin | Here, we present experimental results of the M-dependence of both the structural (alpha) relaxation process, which controls the glass transition, and faster (beta and gamma) secondary relaxation processes for a range of polymers of varying chain flexibility. | Session 50: Molecular and Polymer Glass Dynamics |
| 856 | Unusual Viscoelasticity in Polyrotaxane Glasses | Dikshit, Karan; Bruns, Carson | This work characterizes the viscoelastic properties of glasses made from polyrotaxanes, a class of mechanically interlocked polymers possessing a bead-on-a-string structure. | Session 50: Molecular and Polymer Glass Dynamics |
| 857 | Volume recovery and physical aging of pressure-densified glasses | Fragiadakis, Daniel; Holt, Adam; Roland, Charles | Using molecular dynamics simulations of a simplified model of TNB, we show that the effects of vitrification pressure and subsequent volume recovery and aging of the glass are comparable to experimental results for real TNB. | Session 50: Molecular and Polymer Glass Dynamics |
| 858 | Understanding aging phenomena by the free-energy-landscape approach | Odagaki, Takashi | Exploiting the free-energy-landscape (FEL) theory[1], which explains dynamic and thermodynamic properties of non-equilibrium systems in a unified frame work, I argue the physical origin of the aging phenomena for the first time. | Session 50: Molecular and Polymer Glass Dynamics |
| 859 | Lifetime of Rate Domains: Comparison of Simulations and Single-Molecule Experiments in o-Terphenyl | Kaur, Harveen; Paeng, Keewook; Kaufman, Laura; Berg, Mark | Lifetime of Rate Domains: Comparison of Simulations and Single-Molecule Experiments in o-Terphenyl | Session 50: Molecular and Polymer Glass Dynamics |
| 860 | Unified description of the Arrhenian and super-Arrhenian behavior of OTP by the excess internal energy model | Caruthers, James; Yungbluth, Jack; Medvedev, Grigori; Savoie, Brett | Unified description of the Arrhenian and super-Arrhenian behavior of OTP by the excess internal energy model | Session 50: Molecular and Polymer Glass Dynamics |
| 861 | On the Allowable or Forbidden Nature of Vapor-Deposited Glasses | Bauchy, Mathieu | Here, based on reactive molecular dynamics simulation (MD) of silica glasses, we show that, under certain conditions, vapor-deposited glasses can indeed be more stable than melt-quenched glasses. | Session 51: Molecular and Polymer Glass Structure |
| 862 | Stable polystyrene glass films through PVD and UV radiation | Yin, Junjie; Raegen, Adam; Forrest, James | In this study, we extend our capacity to make high molecular weight polystyrene stable glass by using oligomeric stable glass as a starting point. | Session 51: Molecular and Polymer Glass Structure |
| 863 | Physical vapor deposition of a polyamorphic system | Kasting, Benjamin; Beasley, Madeleine; Tracy, Megan; Ediger, Mark | Here we use PVD to investigate triphenyl phosphite (TPP), a known polyamorphic system where the second amorphous state (glacial phase) can be obtained by annealing the ordinary liquid (liquid 1) for hours slightly above its glass transition temperature (205 K). | Session 51: Molecular and Polymer Glass Structure |
| 864 | Physical properties of ultrastable computer-generated glasses | Berthier, Ludovic | In this talk, we show that this discovery has allowed a deeper understanding of the rheological, thermodynamic and thermal properties of amorphous solids. | Session 51: Molecular and Polymer Glass Structure |
| 865 | Effects of internal degrees of freedom on simulated vapor deposited glass films | Moore, Alex; Walsh, Patrick; Fakhraai, Zahra; Riggleman, Robert | Thus far, we suggest that molecules exhibiting greater entropy in their supercooled liquid state create more stable PVD glass films. | Session 51: Molecular and Polymer Glass Structure |
| 866 | Anisotropy of extremely monodisperse polymer stable glass thin films | Raegen, Adam; Yin, Junjie; Zhou, Qi; Forrest, James | Using our recently demonstrated technique for making polymer stable glasses, we present an experimental study of extremely monodisperse, ultrastable polymeric/oligomeric thin films. | Session 51: Molecular and Polymer Glass Structure |
| 867 | Stability dependence of local elastic inhomogeneities of amorphous solids | Shakerpoor, Alireza; Flenner, Elijah; Szamel, Grzegorz | In this work, we studied the interplay between the stability and the fluctuations in the local elastic constants for a wide range of stabilities. | Session 51: Molecular and Polymer Glass Structure |
| 868 | Strong elasticity anisotropy in molecular glasses | Wang, Zuyuan; Cang, Yu; Fytas, George; Bishop, Camille; Ediger, Mark | In this work, we use micro-Brillouin light spectroscopy to determine the elastic stiffness tensors of three glass films of itraconazole vapor-deposited at substrate temperatures ( T sub) of 330, 315, and 290 K, respectively. | Session 51: Molecular and Polymer Glass Structure |
| 869 | High Stability of Ultrathin Vapor Deposited Molecular Glasses | Jin, Yi; Zhang, Yue; Wolf, Sarah; Zhang, Aixi; Govind, Shivajee; Woods, Connor; Samanta, Subarna; Zhernenkov, Mikhail; Freychet, Guillaume; Fakhraai, Zahra | Previous studies demonstrate that a mobility gradient exists within organic glass films, where molecules at or close to the free surface are more mobile than those in the bulk. | Session 51: Molecular and Polymer Glass Structure |
| 870 | Over what length-scale can the substrate perturb the structure of a vapor-deposited organic glass? | Bagchi, Kushal; Deng, Chuting; Bishop, Camille; Li, Yuhui; Jackson, Nicholas; Toney, Michael; Yu, Lian; De Pablo, Juan; Ediger, Mark | Here we study, with grazing incidence x-ray scattering, the structure of vapor-deposited glasses of molecular glass former DSA-Ph as a function of film thickness. | Session 51: Molecular and Polymer Glass Structure |
| 871 | Molecular Orientation Depth Profiles from Resonant Soft X-ray Reflectivity | Thelen, Jacob; Bagchi, Kushal; Bishop, Camille; Mukherjee, Subhrangsu; Gann, Eliot; Kline, R. Joseph; Ediger, Mark; DeLongchamp, Dean | We use vapor-deposited films of tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as a model system to develop soft X-ray techniques to extract molecular orientation from organic thin films. | Session 51: Molecular and Polymer Glass Structure |
| 872 | Molecular dynamics simulation for investigation of Boson peak in a polymer system | Koyama, Akira; Fukao, Koji; Yamamoto, Takashi | We performed a molecular dynamics simulation to investigate Boson peak (BP) in a united atom polyethylene system. | Session 51: Molecular and Polymer Glass Structure |
| 873 | The effect of molecular architecture on the physical properties of supercooled liquids studied by MD simulations. Density scaling and its relation to the equation of state | Koperwas, Kajetan; Andrzej, Grzybowski; Paluch, Marian | Given this problem into account, we project new model systems, which in contrast to the simple-liquids exhibit structural anisotropy, and we examine the effect of molecular anisotropy on the dynamic and thermodynamic properties of the material. | Session 51: Molecular and Polymer Glass Structure |
| 874 | Robotic Morphing Matter as Materialized AI | Yao, Lining | In this talk, Lining presents the recent works in the Morphing Matter Lab, Human-Computer Interaction Institute of School of Computer Science at Carnegie Mellon University and highlights several robotic morphing materials that weave advanced manufacturing, computational tools, and design thinking. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 875 | Spider-morphs: Designing 3D shapes from multiple tapered elasticæ. | Liu, Mingchao; Domino, Lucie; Vella, Dominic | Here we introduce a design framework for forming approximately axisymmetric 3D structures by harnessing the buckling of multiple tapered elastic sheets (the legs) connected in a central portion (the body). | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 876 | Reshapable groovy sheets | Meeussen, Anne; Van Hecke, Martin | We show that groovy sheets—thin sheets with parallel corrugations—form patterns of snap-through defects and shift into different shapes, depending on how they are actuated. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 877 | Under pressure: Mechanics of swelling hydrogels under confinement | Louf, Jean-Francois; Lu, Nancy; O’Connell, Margaret; Cho, H. Jeremy; Datta, Sujit | We have developed the ability to directly visualize hydrogel swelling within a three-dimensional porous medium that mimics soil. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 878 | Delicate and Precise Grasping using Kirigami | Holmes, Douglas; Yang, Yi; Vella, Katherine | In this work, through a combination of experiments and modeling, we demonstrate how the mechanical actuation of kirigami shells enables both delicate and precise grasping of a wide variety of objects. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 879 | Design and mechanics of complex inflatable networks | Jones, Trevor; Jambon-Puillet, Etienne; Brun, Pierre-Thomas | We have recently introduced “bubble casting”, a novel assembly method that leverages the fluidity of curing silicone elastomers to easily fabricate soft actuators with complex shapes. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 880 | Buckling and Metastability in 2D Impurity Arrays | Plummer, Abigail; Nelson, David | We study a periodic array of impurities that produce local dilations, embedded in a two-dimensional crystalline solid that can buckle out of the plane. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 881 | 4D printing of mechanically programmable shape-shifting liquid crystal elastomers | Barnes, Morgan; Verduzco, Rafael | Here, we use a new reactive printing method that enables the printing of a dual network liquid crystal elastomer (LCE) which can be mechanically programmed into the desired shape change. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 882 | Versatile and controllable shape morphing using twisted-and-coiled actuators | Sun, Jiefeng; Zhao, Jianguo | We propose a different strategy: strategically embedding soft actuators into a soft body to enable versatile shape morphing by actively controlling the deformation of each soft actuator. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 883 | Controlled Shape-morphing of Elastic Sheets by Chemically-driven Fluid Flow | Manna, Raj Kumar; Shklyaev, Oleg; Stone, Howard; Balazs, Anna | Here, using a computational model that incorporates interrelated chemical, hydrodynamic and mechanical interactions, we demonstrate how a (2D) enzyme-coated elastic sheet can spontaneously morph into 3D structures in response to specific chemical stimuli introduced in the fluid-filled microchamber. | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 884 | Morphing Surfaces formed by Liquid Crystal Elastomer Coatings: Design and Modeling | Selinger, Robin; Mosaddeghian Golestani, Youssef; Selinger, Jonathan; Afghah, Sajedeh; Varga, Michael | To mimic this functionality in an engineered material, we design and model dynamically morphing surface coatings composed of stimuli-responsive liquid crystal elastomers (LCE). | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 885 | Active rapid morphing mechanism of the Venus flytrap | Ryu, Jeongeun; Forterre, Yoël | Active rapid morphing mechanism of the Venus flytrap | Session 52: Morphing Matter: From Soft Robotics to 4D Printing |
| 886 | Encoding kirigami bi-materials to morph on target in response to temperature | Pasini, Damiano; Liu, Lu; Qiao, Chuan; An, Haichao | Here, we demonstrate that a pair of off-the-shelf passive solids, such as wood and silicone rubber, can be topologically arranged in a kirigami bi-material to engage temperature to collectively deploy into a geometrically rich set of periodic and aperiodic shapes that can shape-match a predefined target. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 887 | Assembly Behaviors Design with Magnetic Handshake Materials | Du, Chrisy Xiyu; Niu, Ran; Esposito, Edward; McEuen, Paul; Cohen, Itai; Brenner, Michael | Inspired by nature’s ability of assembling intricate materials, we recently developed an assembly platform that can create specific binding by encoding magnetic dipole patterns into panel-like building blocks. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 888 | Photothermally Reconfigurable Shape Memory Magnetic Cilia | Liu, Jessica; Evans, Benjamin; Tracy, Joseph | Photothermally Reconfigurable Shape Memory Magnetic Cilia | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 889 | Control of a Hydrogel Based Soft Robot Using Light | Aggarwal, Aaveg; Yuan, Hang; Olvera De La Cruz, Monica | To this end, we report our theoretical work on the light induced deformations in these robots and the corresponding changes in functionality. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 890 | Semiflexible origami and their many minima | Lee-Trimble, Mary Elizabeth; Kang, Ji-Hwan; Hayward, Ryan; Santangelo, Christian | Here, we show how to relax the rigidity of origami by allowing a small amount of stretching along the folds, which in turn allows Gaussian curvature at the vertices. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 891 | Morphing Colloidal Crystals with Active Additives | VanSaders, Bryan; Glotzer, Sharon | In this work we discuss how small clusters of active particles with variable diameter can cause long range shear displacement within a simulated colloidal monolayer. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 892 | Generating multiple surfaces from a single inhomogeneous anisotropically deforming sheet | Griniasty, Itay; Cohen, Itai; Sethna, James | Here, we derive a general solution to this inverse design problem for inhomogeneous, anisotropically deforming materials. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 893 | Morphing Surfaces for μ-Contact Printing | Anthamatten, Mitchell; Kim, Soyoun; Liu, Nan; Shestopalov, Alexander; Lambropoulos, John | Here, we employ shape-memory surfaces with thermo-mechanical programming to achieve large-area pattern transfer to multilayered films from donor substrates to receiving plates. | Session 53: Morphing Matter: from Soft Robotics to 4D Printing |
| 894 | Development and Application of Three-Dimensional Multi-Resolution Imaging | Yang, Haw | In this presentation, we explain how a multi-resolution approach helps to elucidate dynamics in complex systems. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 895 | Avalanching Upconverting Nanoparticles for Super Resolution Imaging | Xu, Emma; Lee, Changhwan; Yao, Kaiyuan; Cohen, Bruce; Chan, Emory; Suh, Yung Doug; Schuck, P. James | Here, we introduce avalanching upconverting nanoparticles (AUCNPs), NaYF4 nanocrystals doped with Thulium ions. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 896 | Mechanical unzipping of DNA molecules in parallel using nanophotonic tweezers | Ye, Fan; Inman, James; Wang, Michelle | Here, we present an nSWAT that achieves manipulation forces large enough to mechanically unzip an array of DNA molecules at room temperature. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 897 | A Simple Approach to Optical Trapping Analysis | Hasbun, Javier; Howard, James; Patterson-Goss, Zachary; Tripathy, Suvranta | We have developed a simplified model of an optically trapped micron-sized particle using a modified version of a numerical approach [2]. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 898 | Bacterial proteomes are predictable from cellular Raman spectra | Kamei, Ken-ichiro; Kobayashi-Kirschvink, Koseki; Nakaoka, Hidenori; Wakamoto, Yuichi | Using quantitative proteome data of E. coli cultured under various conditions (Schmidt et al., Nature Biotechnology, 2016), we show that proteomes can be linked to and reconstructed from cellular Raman spectra. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 899 | Live measurements of transcriptional bursting and dynamic gene regulation in early fly embryos | Chen, Po-Ta; Zoller, Benjamin; Levo, Michal; Gregor, Thomas | We have developed an optimized 2-photon microscope to measure realtime gene activity in early fly embryos. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 900 | The Origin of Enhanced Enzyme Motility Probed with Optical Tweezers | Huang, Tian; Park, Jin Tae; Pak, Hyuk Kyu; Granick, Steve | In this talk, we will discuss our effort to measure these forces by using optical tweezers. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 901 | Multimodal microscopy through optimal integration of wide-field and focused-beam laser illumination | Lee, Sang-Hyuk | In this talk, I will describe the design of the instrument and its application to the multimodal imaging and spectroscopy of biological systems. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 902 | Near-field optical interferometer for refractive index sensing | Ghaffari, Abbas; Do, Kevin; Riehn, Robert | Here we introduce a near-field optical interferometer that detects the presence of nanoparticles and proteins by measuring the deflection of a light, and not transmission as commonly performed. | Session 54: Multimodal Optical Trapping/Microscopy/Spectroscopy of Living Matter |
| 903 | Bioinspired liquid crystal patterns to command living matter | Lavrentovich, Oleg | To establish communication with microscale biological systems, we propose to use special class of nontoxic lyotropic chromonic liquid crystal with a long-range orientational order. | Session 55: Non-Equilibrium Bioinspired Modes of Assembling Materials |
| 904 | Reaction-Diffusion Driven Pattern Formation in Soft Materials | Sottos, Nancy; Lloyd, Evan; Dean, Leon; Moore, Jeffrey | This talk will describe several novel methods to control thermal transport in this system, giving rise to symmetry breaking events that enable complex, emergent pattern formation and control over growth, topology, and shape. | Session 55: Non-Equilibrium Bioinspired Modes of Assembling Materials |
| 905 | Programming dynamic pathways to colloidal self-assembly using DNA nanotechnology | Rogers, William; Hensley, Alexander | In this talk, I will present experiments showing that: (1) combining DNA-grafted particles with free DNA oligomers dispersed in solution can create suspensions with new types of assembly pathways; and (2) we can quantify the dynamic pathways to self-assembly, such as nucleation and growth, using a combination of microfluidics, video microscopy, and image analysis. | Session 55: Non-Equilibrium Bioinspired Modes of Assembling Materials |
| 906 | Sandwich Layering in Binary Colloidal Films During Evpaorative Drying | Liu, Weiping; Carr, Amanda; Routh, Alexander; Yager, Kevin; Bhatia, Surita | In this talk, I will present our recent results from microbeam small-angle X-ray scattering (SAXS) on films prepared from binary colloidal dispersions containing large and small particles of varying size and initial volume fraction. | Session 56: Non-equilibrium Dynamics of Film Formation During Drying |
| 907 | Illuminating the dynamics of drying suspensions in droplets and films | Sprakel, Joris | We show how LSI can be used to pinpoint the coating open time and moment of film formation, give insight into subsurface transport and the emergence and propagation of cracks. | Session 56: Non-equilibrium Dynamics of Film Formation During Drying |
| 908 | Drying Process in Films of Nanoparticle Suspensions and Polymer Solutions | Cheng, Shengfeng | I will describe our efforts using large scale molecular dynamics (MD) simulations to study the drying process of colloid suspensions, polymer solutions, and their mixtures. | Session 56: Non-equilibrium Dynamics of Film Formation During Drying |
| 909 | Stratification in Drying Colloidal Films: A competition between diffusion, evaporation and diffusiophoresis | Rees-Zimmerman, Clare; Routh, Alexander | To understand stratification in drying coatings, one dimensional drying of bi-disperse mixtures has recently been the subject of intense theoretical and experimental study. | Session 56: Non-equilibrium Dynamics of Film Formation During Drying |
| 910 | The role of hydrodynamic interactions in models and simulations of drying | Howard, Michael; Statt, Antonia; Panagiotopoulos, Athanassios | Here, I will highlight two examples from our recent work that clearly demonstrate the important role of hydrodynamic interactions in nonequilibrium models of drying. | Session 56: Non-equilibrium Dynamics of Film Formation During Drying |
| 911 | Novel biomedical applications of lasers: dermatology, gynecology, and stomatology | Lukac, Matjaz; Milanic, Matija; Jezersek, Matija | Novel biomedical applications of lasers: dermatology, gynecology, and stomatology | Session 57: Optics in Soft Matter and Medicine |
| 912 | Understanding coronary plaque biomechanical properties with intravascular imaging | Bouma, Brett | We have recently developed a novel approach for real-time modeling that can be used during procedures in the cardiac catheterization laboratory. | Session 57: Optics in Soft Matter and Medicine |
| 913 | Optical properties of silicone rubber tissue phantoms for biomedical optics applications | Milanic, Matija; Novak, Jure; Naglič, Peter; Zelinskyi, Yevhen; Rogelj, Luka; Kumperščak, Borut; Stergar, Jost; Bürmen, Miran | A useful phantom must be well characterized, namely its physical properties must be accurately measured using standard techniques. | Session 57: Optics in Soft Matter and Medicine |
| 914 | Laser induced jets in needle free drug delivery | Pankaj, FNU; Marston, Jeremy | Here, we have investigated the feasibility of laser-induced micro-jets as a needle-free injection technique. | Session 57: Optics in Soft Matter and Medicine |
| 915 | Fourier Transform Laser Speckle Imaging for art conservation | Buijs, Jesse; Van der Gucht, Jasper; Sprakel, Joris | In this article we show how to apply this algorithm and how to measure a diffusion coefficient with it. | Session 57: Optics in Soft Matter and Medicine |
| 916 | Doppler Functional Imaging of Cancer Drug Sensitivity in Living Tumor Biopsies | Li, Zhe; Jalal, Shadia; Turek, John; Nolte, David | We introduce a technique called tissue dynamics spectroscopic imaging (TDSI) to reveal drug response variations within small cubic millimeter biopsy samples. | Session 57: Optics in Soft Matter and Medicine |
| 917 | Probing the interior dynamics of shear thickening colloidal suspensions using confocal line scans | Miller, Joia; Blair, Daniel; Urbach, Jeffrey | Here we use line scans on a confocal microscope to visualize particle flows in a sheared suspension, increasing our temporal resolution by two orders of magnitude. | Session 57: Optics in Soft Matter and Medicine |
| 918 | Nanoscale Optical Imaging of Soft Matter Under Flow | Shakya, Anisha; Park, Seong Jun; King, John | We use this technique to study depletion layer formation and dynamics under Poiseuille flow, which remains an outstanding problem in fluid mechanics. | Session 57: Optics in Soft Matter and Medicine |
| 919 | Analyzing the Flow Drying Colloidal Suspensions Using Optical Coherence Tomography | Li, Lanfang; Huang, Yongyang; Jiang, Zhiyu; Zhou, Chao; Ou-Yang, H Daniel | In this work, we present the visualization and analysis of flow in drying colloidal suspensions composed of colloidal polymer particles in water. | Session 57: Optics in Soft Matter and Medicine |
| 920 | Hyperspectral imaging as a technique to evaluate peritonitis in mouse models | Stergar, Jost; Dolenec, Rok; Lakota, Katja; Brezovec, Neza; Perse, Martina; Kojc, Nika; Tomsic, Matija; Milanic, Matija | We present a classification method for determination of the state of peritonitis using HSI. | Session 57: Optics in Soft Matter and Medicine |
| 921 | A statistical mechanical theory for the origin of rigidity in crystalline solids | Sengupta, Surajit | Starting from these general considerations, we had shown that crystal rigidity arises as a consequence of a first order phase transition in an expanded parameter space [1]. | Session 58: Origin of Rigidity and Yielding |
| 922 | Critical Scaling of Avalanches with Strain Rate in Athermal, Disordered Solids | Robbins, Mark; Clemmer, Joel; Salerno, Kenneth | In contrast to lattice models, we find z>1, as required by causality. | Session 58: Origin of Rigidity and Yielding |
| 923 | Bauschinger effect in model glasses | Patinet, Sylvain; Barbot, Armand; El Korde, Ismail; Lerbinger, Matthias; Vandembroucq, Damien; Lemaître, Anaël | We present here recent results obtained on two-dimensional model glasses at atomistic and mesoscopic scales. | Session 58: Origin of Rigidity and Yielding |
| 924 | Shear banding transition in granular materials under uniform and boundary shear | Zhao, Yiqiu; Bares, Jonathan; Zheng, Hu; Socolar, Joshua | In the present work, we study how this transition is affected by the specific choice of the relative velocities of the rings. | Session 58: Origin of Rigidity and Yielding |
| 925 | Strain localization and shear band formation during tensile tests of disordered floating granular monolayers | Xiao, Hongyi; Ivancic, Robert; Zhang, Ge; Riggleman, Robert; Liu, Andrea; Durian, Douglas | In this study, quasi-static tensile experiments were performed using a model disordered solid consisting of a monolayer of polydisperse granular spheres with capillary attractions floating on an air-oil interface. | Session 58: Origin of Rigidity and Yielding |
| 926 | Yielding and mechanical failure in (amorphous) solids | Horbach, Juergen | Recently, a Monte Carlo simulation study [1] has shown that yielding in crystalline solids is associated with an underlying quasi-static first-order phase transition. | Session 58: Origin of Rigidity and Yielding |
| 927 | Unjamming and reentrant jamming of dense systems in the extreme active limit | Bedi, Deshpreet; Chaudhuri, Pinaki; Dasgupta, Chandan; Chakraborty, Bulbul | We find that there is a threshold force above which the system remains fluid indefinitely but below which the system experiences reentrant jamming, and that this threshold force increases as the density of the system is increased. | Session 58: Origin of Rigidity and Yielding |
| 928 | States of self-stress in disordered solids | Zhang, Shang; Zhang, Leyou; Vasisht, Vishwas; Del Gado, Emanuela; Mao, Xiaoming | We investigate the interplay between the mechanical responses of disordered solids and their states of self-stress (SSSs), which are equilibrium stress distributions in a mechanical network with force balanced on any component. | Session 58: Origin of Rigidity and Yielding |
| 929 | Local order and structural rearrangement in two-dimensional jammed systems under oscillatory shear | Teich, Erin; Galloway, Larry; Arratia, Paulo; Bassett, Danielle | We analyze local crystallinity and identify crystal grains in these systems. | Session 58: Origin of Rigidity and Yielding |
| 930 | Yielding and transient shear banding in soft jammed solids | Vasisht, Vishwas; Del Gado, Emanuela | We use this computational approach to investigate the microscopic origin of the flow inhomogeneities and the role played by the confinement. | Session 58: Origin of Rigidity and Yielding |
| 931 | Strain dependent hysteresis in nanoparticle aggregate dispersions visualized to explain origin of the Payne Effect and Spectral Hole Burning in cross-linked filled rubber | Gault, Zach; Terdik, Zsolt; Lu, Peter; Werner, Joerg; Weitz, David | We create a transparent model system to study the strain dependent hysteresis of nanoparticle aggregates. | Session 58: Origin of Rigidity and Yielding |
| 932 | Interfacial Rheology and Breathing | Zasadzinski, Joseph; Barman, Sourav | Using a newly designed capillary microtensiometer, we have found that increasing concentrations of lysophosphatidylcholines, a product of the inflammation induced degradation of phospholipids, causes the dilatational modulus to decrease as ω decreases, resulting in ( 2ε-γ) < 0, creating conditions that induce the Laplace instability. | Session 59: Physics of Complex Liquid Interfaces |
| 933 | Solutal Marangoni spreading in the presence of pre-deposited insoluble surfactant monolayers | Sauleda, Madeline; Garoff, Stephen; Tilton, Robert | Talc tracer particles monitor the extent of spreading, and a trans-illumination method is used to measure the temporal evolution of the subphase surface deformation. | Session 59: Physics of Complex Liquid Interfaces |
| 934 | Exploring the free energy landscape to predict surfactant adsorption isotherm at nanoparticle-water interface | De Angelis, Paolo; Cardellini, Annalisa; Asinari, Pietro | Here, by coupling Steered Molecular Dynamics (SMD) with the Langmuir theory, we predict the adsorption isotherm of Sodium-Dodecyl-Sulphate (SDS) on α-alumina NP. | Session 59: Physics of Complex Liquid Interfaces |
| 935 | Finite-size line tension effects for nanoparticles at the air-liquid surface | Law, Bruce; Matsubara, Hiroki; Otsuka, Jo | Finite-size line tension effects for nanoparticles at the air-liquid surface | Session 59: Physics of Complex Liquid Interfaces |
| 936 | Adsorption of nanosheet particles to surfactant-laden interfaces | Anjum, Nishat; Chang, Ya-Wen | In this work, we show that selected oil-soluble surfactants promote the adsorption of hydrophilic nanosheet particles and enhance bulk oil-in-water emulsion stability. | Session 59: Physics of Complex Liquid Interfaces |
| 937 | What are the effects of processing conditions on the interfacial viscoelasticity of asphaltene interfaces? | Cole, Garrett; Christopher, Gordon | We have examined how large amplitude dilatational strains change the interfacial shear viscoelasticity of asphaltene interfaces. | Session 59: Physics of Complex Liquid Interfaces |
| 938 | Pore scale, multi phase flow assessment for industrial applications | Steiner, Mathias; Neumann, Rodrigo; Giro, Ronaldo; Engel, Michael | We report progress of our research of flow analysis at nanometer to micrometer scales for industrial applications. | Session 59: Physics of Complex Liquid Interfaces |
| 939 | 2D to 3D transition of nanoparticles assembled at the liquid interface | Chai, Yu; Lukito, Alysia; Hasnain, Jaffar; Toor, Anju; feng, wenqian; Jiang, Yufeng; Forth, Joe; tang, yunhui; hou, honghao; williams, teresa; chandra, ravi; li, dong; Geissler, Phillip; helms, brett; Russell, Thomas; ashby, paul | 2D to 3D transition of nanoparticles assembled at the liquid interface | Session 59: Physics of Complex Liquid Interfaces |
| 940 | Co-surfactant based interfacial strategies for the formation and stabilization of multiple nanoemulsions | Sheth, Tanvi; Helgeson, Matthew | Here, we propose a general method for promoting and stabilizing complex nanodroplet structures by manipulating their interfacial mechanics through co-surfactants of opposing spontaneous curvature. | Session 59: Physics of Complex Liquid Interfaces |
| 941 | High-speed X-ray Photon Correlation Spectroscopy studies of dynamics in liquid-liquid extraction systems | Sheyfer, Dina; Zhang, Qingteng; Loeffler, Troy; Lal, Jyotsana; Dufresne, Eric; Narayanan, Suresh; Soderholm, Lynda; Sankaranarayanan, Subramanian; Sandy, Alec; Antonio, Mark; Stephenson, Gregory | Here, we present a high-speed XPCS study of critical fluctuation dynamics in an important class of complex organic fluids designed for chemical separations. | Session 59: Physics of Complex Liquid Interfaces |
| 942 | Tubulation and dispersion of oil by growth of marine bacteria on oil droplets | Hickl, Vincent; Juarez, Gabriel | Here, we describe experimental observations on the emergence of tubular structures resulting from the growth and division of rod-shaped bacteria on the liquid interface of oil droplets. | Session 59: Physics of Complex Liquid Interfaces |
| 943 | Effect of polymer topology on the structure and dynamics of block copolymers at Liquid/Liquid Interfaces | qian, kun; Tsige, Mesfin | Molecular dynamics simulations using a bead-spring model on representative block copolymer architectures at immiscible liquid/liquid interfaces have been carried out. | Session 59: Physics of Complex Liquid Interfaces |
| 944 | A novel method for interfacial rheology using an indirect interfacial rheometer | Muntz, Iain; Thijssen, Job | We have developed a system for performing interfacial rheology without attaching a probe directly to the interface itself. | Session 59: Physics of Complex Liquid Interfaces |
| 945 | Bubble Nucleation in Polymer-CO2 Mixtures | Wang, Zhen-Gang | We present an incipient-phase analysis which allows identification of phases that can form from the metastable CO 2-supersaturated parent phase. | Session 60: Physics of Foams: Fundamentals and Applications |
| 946 | Equilibrium coexistence between polyol, CO2, and a physical blowing agent at elevated pressures | Chao, Huikuan; Ylitalo, Andrew; Kornfield, Julie; Ginzburg, Valeriy; Zhou, Weijun; Fitzgibbons, Thomas; Wang, Zhen-Gang | As a fist step to approach the issue, we develop a liquid-state theory of a ternary foaming system (PBA, CO 2 and polyols) and study the phase behaviors of the system at manufacture-relevant conditions. | Session 60: Physics of Foams: Fundamentals and Applications |
| 947 | Microfluidic Approach to Study Bubble Nucleation in Polymeric Foams for the Development of DFT-based Models | Ylitalo, Andrew; Chao, Huikuan; Fitzgibbons, Thomas; Ginzburg, Valeriy; Zhou, Weijun; Wang, Zhen-Gang; Kornfield, Julie | Single-component classical nucleation theory predicts erroneous nucleation barriers, particularly when applied to foaming of multicomponent liquids used to produce lightweight, functional materials. | Session 60: Physics of Foams: Fundamentals and Applications |
| 948 | An Off-Lattice Sanchez-Lacombe Related Equation of State Extensible to Polymeric Foams | Alam, Hassan; Park, Chul B.; Thompson, Russell | Thus, we proposed a new criterion for glass transition temperature calculations. | Session 60: Physics of Foams: Fundamentals and Applications |
| 949 | Experimental Test of the Border-Crossing Model of Diffusive Coarsening in Wet Foams | Durian, Douglas; Chieco, Anthony | Here we extend this theory and describe on-going experiments to test it by measurement of area changes for six-sided bubbles, which would neither grow nor shrink if perfectly dry. | Session 60: Physics of Foams: Fundamentals and Applications |
| 950 | Experimentally Testing a Generalized Coarsening Model for Quasi-Two-Dimensional Wet Foams | Chieco, Anthony; Durian, Douglas | Accounting for the size of the Plateau borders and gas that diffuses through both the Plateau Borders and thin films separating two bubbles, we modify von Neumann’s law to a no-fit general coarsening equation where bubble size and shape now matter. | Session 60: Physics of Foams: Fundamentals and Applications |
| 951 | Intelligent Design of Cellular Solids for Impact Mitigation | Reyes-Martinez, Marcos; Shen, Meng; Chan, Edwin; Soles, Christopher; Pashine, Nidhi; Nagel, Sidney; Jaeger, Heinrich; De Pablo, Juan | Here, we demonstrate bond pruning and global node position optimization as effective routes for designing cellular materials with isotropic auxetic properties, and for independently controlling μ and K. | Session 60: Physics of Foams: Fundamentals and Applications |
| 952 | Heat transfer of low-density styrenic foam | Wong, Anson; Rickard, Mark | Heat transfer of low-density styrenic foam | Session 60: Physics of Foams: Fundamentals and Applications |
| 953 | Human Comfort and the Physics of Foams | Aou, Kaoru; Xu, Wenbo; Dietsche, Laura; Brune, Douglas; Thota, Manoj | Thermal comfort simulation was conducted using the ASHRAE Human Comfort model, coupled with a multiphysics model taking into account natural convection of air, thermal conduction and mass (water vapor) diffusion phenomena. | Session 60: Physics of Foams: Fundamentals and Applications |
| 954 | Foam formation in microfluidic EDGE devices: tuning the bubble size | Deng, Boxin; Schroën, Karin; De Ruiter, Jolet | We use so-called partitioned-EDGE microfluidic chips with which we can produce bubbles in an array of rectangular pores. | Session 60: Physics of Foams: Fundamentals and Applications |
| 955 | Phoamtonic designs yield sizeable 3D photonic band gaps | Klatt, Michael Andreas; Steinhardt, Paul; Torquato, Salvatore | We show that it is possible to construct foam-based heterostructures with complete photonic band gaps. | Session 60: Physics of Foams: Fundamentals and Applications |
| 956 | Using Algebraic and Geometric Topology to Characterize Hierarchical Organization in Complex Solutions and Their Interfaces | Clark, Aurora | Ongoing work is combining both the algebraic and geometric topology formalism to create a holistic approach that relates hierarchical organizational patterns to structure and even function within complex solutions and their interfaces. | Session 61: Physics of Liquids |
| 957 | Hanging droplets from liquid surfaces | Xie, Ganhua; Forth, Joe; Zhu, Shipei; helms, brett; ashby, paul; Shum, Ho Chueng; Russell, Thomas | Here, we show that a droplet of a denser aqueous solution, containing a polyelectrolyte can hang on the surface of a less dense aqueous solution containing an oppositely charged polyelectrolyte. | Session 61: Physics of Liquids |
| 958 | Dipolar dimer liquid | Zhang, Junyi | A lattice liquid model, dipolar dimer liquid (DDL), is proposed motivated by the water. | Session 61: Physics of Liquids |
| 959 | Extended equation of state for non-ideal mixtures near the consolute critical point. | Rudnikov, Yevgenii; POTOMKIN, MYKOLA | Using the proposed approach for liquid components of obtained and literature data for mixtures C4H8O2 – H2O, CH4O – C6H14, C6H7N – D2O, the constant combinations of thermodynamic parameters have been found. | Session 61: Physics of Liquids |
| 960 | Numerical Modeling of Room Temperature Ionic Liquids | Klymko, Katherine; Bell, John; Garcia, Alejandro; Carney, Sean; Nonaka, Andy | We present a mesoscale numerical model for room temperature ionic liquids. | Session 61: Physics of Liquids |
| 961 | Evaporation of Lennard-Jones Monomer-Dimer Mixtures | Liu, Binghan; Cheng, Shengfeng | We use Lennard-Jones (LJ) liquids as model systems to study the nonequilibrium physics of evaporation. | Session 61: Physics of Liquids |
| 962 | Decomposing thermal fluctuations in fluids with hydrodynamic modes | Deng, Xiaohui | We report the analytic solution of the complete set of 2D hydrodynamic modes in a channel geometry, under the Navier slip boundary condition. | Session 61: Physics of Liquids |
| 963 | Correlation between local viscosity and the atomic-level stresses in liquids. | Iwashita, Takuya | To study the relationship between viscosity and local structures we performed molecular dynamics simulations on various metallic liquids. | Session 61: Physics of Liquids |
| 964 | Importance of nuclear quantum effects on the hydration of chloride ion | Xu, Jianhang; Sun, Zhaoru; Tang, Fujie; Lu, Deyu; Wu, Xifan | We performed ab initio path-integral molecular dynamics simulations based on the SCAN functional. | Session 61: Physics of Liquids |
| 965 | Connectedness of the configuration space of hard disk systems | Ericok, Ozan; Mason, Jeremy | Preliminary attaching maps are then found using the zero-temperature string method, resulting in a complete characterization of the topology of the configuration space of hard disk systems for small numbers of disks. | Session 61: Physics of Liquids |
| 966 | The stability-limit conjecture revisited | Chitnelawong, Pheerawich; Sciortino, Francesco; Poole, Peter | By demonstrating that a binodal may terminate on a spinodal at a point that is not a critical point, we show that the SLC is thermodynamically permissible in a system that has both a liquid-gas and a liquid-liquid phase transition. | Session 61: Physics of Liquids |
| 967 | Energy landscapes: from molecules and nanodevices to glasses and machine learning | Wales, David | This talk will highlight connections between glassy systems and emergent phenomena in clusters, biomolecules and soft matter. | Session 61: Physics of Liquids |
| 968 | Nanoscale dynamics of liquids: S(Q,ω) with 0.8 meV resolution using x-rays | Baron, Alfred; Ishikawa, Daisuke | We describe a new instrument for measuring the dynamic structure factor of liquids, S(Q,ω) , at the RIKEN SPring-8 Center in Japan using inelastic x-ray scattering (IXS) (see https://arxiv.org/abs/1504.01098). | Session 61: Physics of Liquids |
| 969 | The formation of nanoripples by ultra-low energy ion irradiation reveals the liquidus nature of metallic glass surface | Luo, Peng; Correa, Camilo; Spear, Jessica; Allain, Jean; Zhang, Yang | We report an experimental investigation of ion irradiation on metallic glasses (MGs), with extremely low ion energy of 50~225 eV, orders of magnitude lower than that often used in previous studies. | Session 61: Physics of Liquids |
| 970 | Study of Mesoscale Structure and Dynamics of Associated Liquid 2-propanol by Neutron Scattering and Molecular Dynamics Simulations | Zhai, Yanqin; Faraone, Antonio; Zhang, Yang | We focus on the mesoscale structures associated to the structure factor pre-peak at wavevector Q ~ 0.8 Å -1. | Session 61: Physics of Liquids |
| 971 | Self-Diffusion of Liquid Normal Hydrogen: A Quasi-Elastic Neutron Scattering Study | Prisk, Timothy; Hanna, Scott; Azuah, Richard | In this presentation, we report quasi-elastic neutron scattering measurements of liquid normal hydrogen under saturated vapor pressure. | Session 61: Physics of Liquids |
| 972 | A Microscopic Description of Dielectric Relaxation in Water using Quasi-Elastic Neutron Scattering | Sarathchandran, Yadu Krishnan; Shinohara, Yuya; Mamontov, Eugene; Dmowski, Wojciech; Egami, Takeshi | We report our study on the microscopic picture of water’s dielectric relaxation using the time-dependent pair-distribution function, the Van Hove function. | Session 61: Physics of Liquids |
| 973 | Atomic dynamics of liquid Hg studied by high-resolution inelastic x-ray scattering | Ishikawa, Daisuke; Baron, Alfred | We use the new setup to investigate liquid Hg with energy resolution >0.8 meV at temperature near the melting point T m = 234.3 K. | Session 61: Physics of Liquids |
| 974 | Isotope effect in liquid water explored by X-ray absorption spectroscopy | Zhang, Chunyi; Zhang, Linfeng; Xu, Jianhang; Tang, Fujie; Wu, Xifan | The X-ray absorption spectra (XAS) of both liquid H 2O and D 2O are computed using our recently developed approximate computational approach in solving Bethe-Salpeter equation. | Session 61: Physics of Liquids |
| 975 | The Long-range Ordering of Ions in Aqueous Salt Solutions | Fetisov, Evgenii; Fulton, John; Kathmann, Shawn; Mundy, Christopher; Schenter, Gregory | We use a combination of molecular dynamics and X-ray diffraction to correlate experimentally measured long-range structure to the precise spatial distribution of species in aqueous solutions of alkali and alkali earth halides. | Session 61: Physics of Liquids |
| 976 | Influence of ionic species on water broadband electrodynamics | Artemov, Vasily; Ouerdane, Henni | Accounting for dielectric properties [2], isotopic effects [3] and confinement effects [4], we present a model of water based on the time-dependence of the ionic species concentration, over the whole time interval between the intermolecular direct current (below microseconds) and intramolecular infrared vibrations (sub-picoseconds), which so far was hardly achievable. | Session 61: Physics of Liquids |
| 977 | Supramolecular Interactions and Non-Equilibrium Properties of Non-Aqueous Electrolytic Solutions for Next Generation Flow Batteries | Farag, Hossam; Shkrob, Ilya; Zhang, Lu; Cheng, Lei; Zhang, Yang | Herein, we present the simulation results and relative analysis. | Session 61: Physics of Liquids |
| 978 | Local Dynamics in Metallic Liquids Studied by Inelastic Neutron Scattering | Wang, Zengquan; Wang, Hui; Dmowski, Wojciech; Kelton, Kenneth; Egami, Takeshi | In this research, inelastic neutron scattering (INS) experiments were carried out on various metallic liquid droplets (including single, binary, and complex BMG forming liquids), using an electro-static levitator, at different temperatures at SNS. | Session 61: Physics of Liquids |
| 979 | High-resolution neutron imaging study of kinetics of H2O water vapor uptake from air into sessile heavy water droplets | Im, Jae Kwan; Jung, Leekyo; Crha, Jan; Trtik, Pavel; Jeong, Joonwoo | Here we report the neutron imaging of a sessile heavy water (D 2O) droplet that absorbs light water (H 2O) vapor from the ambient air. | Session 61: Physics of Liquids |
| 980 | Lessons from Designing Optogenetic Tools | Woolley, Andrew | I will describe how following up on some odd behaviour observed while trying to engineer photoactive yellow protein as a light-controlled switch, led to interesting, perhaps, general new insights into the behavior of these remarkable moelcules | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 981 | Engineering and application of a biosensor with focused ligand specificity | Della Corte, Dennis | We here solved the structure of the transcriptional regulator LysG of Corynebacterium glutamicum detecting all three basic amino acids. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 982 | Spontaneous Rupture and Entanglement of Human Neuronal Tau Protein Induced by Piconewton Compressive Force | Roy Chowdhury, Susovan; Lu, H Peter | We have observed abrupt and spontaneous tau protein ruptures under a compressive force ranging from ∼5 to ∼125 pN, at a biologically available force amplitude range in living cells, using a home-modified atomic force microscopy single-molecule manipulation. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 983 | Allosteric communications via substrate and linker between domains modulate protein function | SARKAR, SUSANTA | Here we show that inter-domain dynamics of matrix metalloprotease-1 (MMP1) on collagen fibrils are correlated with activity. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 984 | Disordered Protein Folding and Solubility as a Determinant of Human Disease | Levine, Zachary | In this talk, I will summarize our efforts to leverage molecular models of IDPs that populate vast free energy landscapes, reconciling how disordered and often soluble protein intermediates contribute to human disease. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 985 | Is the Protein Dynamical Transition Useful? | Sharma, Akansha; George, Deepu; Markelz, Andrea | Typically the THz measurements are performed using solutions, however there is some question as to whether the freezing of the solution effects protein structure or dynamics. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 986 | Anti-cancer drug containing apolipoprotein B refolding through first-order-like phase transition process | Cheng, Chia Hsin; Chang, Wei-Ping; Lin, Po Yen; Liang, Yu Chuan; Chen, Caleb G.; Chang, Chia-Ching | In this study, we refolded apoB with anti-cancer drug from denatured state to functional state follow a first-order-like state transition model. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 987 | Integrative structural biology: insights from photoactive yellow protein | Wu, Yichao; Kumauchi, Masato; Li, Wenfei; Xie, Aihua; Hoff, Wouter | We report such an integrative structural biology approach using a bacterial photoreceptor (photoactive yellow protein) as an accessible model system. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 988 | Decoupling between translation al and rotation al motions of water in the proximity of a protein molecule | Tan, Pan; Hong, Liang | By performing neutron scattering on a perdeuterated protein at various hydration levels, we characterized the dynamics of water in each molecular layer surrounding the biomolecule . | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 989 | Probing Temperature-Dependent Dynamics of Hemoglobin and Water Molecules in the Hydration Shells Using High Sensitivity Dielectric Spectroscopy | Doan, Luan; Singh, Abhishek; Wen, Chengyuan; Cheng, Shengfeng; Nguyen, Vinh | Employing high-sensitivity dielectric megahertz-to-terahertz frequency-domain spectroscopy, we have systematically examined the dynamics of hemoglobin and the water molecules in their hydration shells as a function of temperature at the molecular level. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 990 | Single Molecule Studies of DNA-Histone Interactions | Gaire, Santosh | Here we present preliminary data characterizing the mechanical properties of DNA molecules bound to native and post-translationally modified histones. | Session 62: Physics of Proteins: Progress on Structure-Function Relationships |
| 991 | Modeling of complexation of oppositely charged polyelectrolytes in aqueous solutions | Ghasemi, Mohsen; Friedowitz, Sean; Qin, Jian; Larson, Ronald | Using a theory, which captures the effects of chain connectivity and ion-specificy of charged species, here we rationalize why in non-stoichiometric mixtures, excess polyelectrolyte appears in the PEC and we pinpoint theoretical underpinnings of the overcharging phenomenon. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 992 | “Looping-back” complexation in stoichiometrically assymmetric polyelectrolyte solutions | Friedowitz, Sean; Lou, Junzhe; Xia, Yan; Qin, Jian | We address this by examining the coacervation behavior of synthetic, homologous polyions over a range of stoichiometric asymmetry between polyanions and polycations. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 993 | Created by kT | Schlenoff, Joseph; Yang, Mo; Digby, Zach; Wang, Qifeng | In this talk I will show how polyelectrolyte coacervates, complexes and multilayers rely on the loss of counterions, an entropic driving force, to assemble. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 994 | Polyelectrolyte micellar complexes | Tirrell, Matthew | We have studied such micelles with nucleic acid-containing cores in detail with some unexpected results. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 995 | Kinetics of phase separation of polyelectrolyte complex coacervates exhibiting lower critical solution temperature | Ali, Samim; Ma, Yuanchi; Mao, Yimin; Prabhu, Vivek | We will report new results on the kinetics of phase separation studied by scattering techniques as a function of quench depth from the binodal. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 996 | Quantification of the lower critical solution temperature phase diagram of polyelectrolyte complex coacervates | Ma, Yuanchi; Ali, Samim; Mao, Yimin; Audus, Debra; Prabhu, Vivek | We will show new static and dynamic light scattering and small-angle neutron scattering results and discuss how the correlation length, osmotic compressibility, and relaxation times change as the coexistence curve is approached by increasing temperature. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 997 | An Anomalous Small Angle X-ray Scattering Study of Counterion Distribution around Macroion | Chen, Jiahui; Bera, Mrinal; Liu, Tianbo | An Anomalous Small Angle X-ray Scattering Study of Counterion Distribution around Macroion | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 998 | Polymer chain conformation in polyelectrolyte complexes | Chalise, Sadhana; Mahalik, Jyoti; Muthukumar, Murugappan | We performed coarse-grained Langevin dynamics simulations of symmetric and flexible PECs and counterions, with and without salt added. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 999 | Constraint Release in Entangled Liquid Coacervates Made from Oppositely Charged Polyelectrolytes | Aponte-Rivera, Christian; Rubinstein, Michael | In this work, we develop a scaling model to predict the effects of constraint release on entangled asymmetric coacervates, finding that the dynamic coupling broadens regimes dominated by tube rearrangement as compared to symmetric coacervates. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 1000 | Solid-to-Liquid Phase Transition in Polyelectrolyte Complexes: Structural Evolution, Dynamics, and Phase Behavior | Meng, Siqi; Ting, Jeffrey; Wu, Hao; Tirrell, Matthew | To fill this gap, we here study a model PEC system comprising two controllably synthesized styrenic polyelectrolytes. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 1001 | Free Energy Profile of Complexation of two oppositely charged Polyelectrolytes | Mitra, Soumik; Kundagrami, Arindam | We report a study of the complexation process of two oppositely charged polyelectrolyte (PE) chains in dilute solution interacting through screened Coulomb potential within the DLVO framework. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 1002 | Scaling relation of Complex Coacervate Core Micelles | Heo, Taeyoung; Audus, Debra; Choi, SooHyung | In this study, complex coacervate core micelles (C3Ms) are prepared by simple mixing of AB and A’B diblock copolyelectrolyte solutions in an aqueous solution where A and A’ are oppositely charged blocks, and B is PEO block. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 1003 | Ionic-group-dependent phase behavior of polyelectrolyte coacervates | Kim, Sojeong; Lee, Minhwan; Lee, Won Bo; Choi, SooHyung | In this study, 4 polyelectrolytes are prepared (e.g., strong/weak and polyanion/polycation) from identical parent polymer using anionic polymerization, and thus 4 pairs of polyelectrolyte complex coacervates are investigated to map out the phase diagrams as a function of the pair of ionic group. | Session 63: Polyelectrolyte Complexation: Thermodynamics and Self-Assembly |
| 1004 | Polymer epitaxy under heterogeneous confinement | Liu, Jason; Xia, Yang; Zheng, Geoffrey; Haataja, Mikko; Arnold, Craig; Priestley, Rodney | In this work, we heterogeneously confine the film into spatially disparate regions of varying thickness to separate the nucleation and growth processes, allowing oriented arrays of epitaxial crystals to grow unimpeded over long distances. | Session 64: Polymer Crystals and Crystallization |
| 1005 | Understanding polymer crystallization undergoing zone annealing | Krauskopf, Alejandro; Jimenez, Andrew; Kumar, Sanat; Lewis, Elizabeth; Vogt, Bryan; Pribyl, Julia; Benicewicz, Brian | Through the application of the Hermans orientation function to our small-angle X-ray scattering detector patterns, we explore the extent of anisotropy that the process imparts on both the pure polymer and the polymer nanocomposite systems, with a focus on the lamellar orientation for the former and the nanoparticle arrangement for the latter. | Session 64: Polymer Crystals and Crystallization |
| 1006 | Tie Molecules and the Brittle-to-Ductile Transition in Near-Monodisperse and Bidisperse Linear Polyethylene | Cho, Seong Hyuk; Register, Richard | The Huang-Brown (HB) model predicts that tie molecules (TM), polymer chains that connect different crystalline lamellae across the amorphous layer, form when the end-to-end distance of the coil in the melt (R) exceeds the intercrystalline spacing (d) in the solid state, i.e., the TM probability should scale with R/d. | Session 64: Polymer Crystals and Crystallization |
| 1007 | Flow Induced Crystallization: Insights from Molecular Simulation | Nicholson, David; Yi, Peng; Rutledge, Gregory | Results for nucleation kinetics accelerated under different modes of deformation, e.g. simple shear or uniaxial extension, and rates of strain are used to assess several of the existing models in the literature for flow-enhanced nucleation, based on their abilities to describe the data accurately, and new models based on the orientational ordering of Kuhn segments induced by flow are proposed. | Session 64: Polymer Crystals and Crystallization |
| 1008 | Stereoregularity, Molecular Dynamics, and Unusual Crystallinity of Hydrogenated Polynorbornenes: Configurational Disorder | Miyoshi, Toshikazu; Kafle, Navin; Makita, Yuta | Recently, a thorough study on stereospecific ring-opening metathesis polymerization has been conducted on norbornenes making the synthesis and the study of hydrogenated polynorbornene (hPNB) stereoisomers possible. | Session 64: Polymer Crystals and Crystallization |
| 1009 | Crystallization of Asymmetric PEO-b-PCL from Different Solvents | Van Horn, Ryan | Our previous work showed that the crystallization order could be switched in symmetric copolymers (nearly equal mass fraction) through selective solvent interactions. | Session 64: Polymer Crystals and Crystallization |
| 1010 | Symmetry breaking via polymer chain overcrowding in molecular bottlebrush crystallization | Li, Christopher; Qi, Hao; Staub, Mark; Henn, Daniel; Zhao, Bin | In this talk, we present the spontaneous formation of spherical hollow crystals with broken translational symmetry in crystalline molecular bottlebrush (mBB) polymers. | Session 64: Polymer Crystals and Crystallization |
| 1011 | Improving Crystallite Size and Orientation in Organic Semiconductor Thin Films using PDMS-Assisted Crystallization | Zhelyaskova, Vesta; Sharma, Prachi; Dessau, Daniel; Shaheen, Sean | We aim to develop a scalable, solution-based method for growing crystalline organic semiconductor thin films, which can be used in a variety of electronic charge transport, metal doping, and device integration studies. | Session 64: Polymer Crystals and Crystallization |
| 1012 | Wang-Landau Simulation of the Free Energy Surface of Crystallization in a Polymer Melt | Kawak, Pierre; Gibson, Andrew; Brown, Logan; Delgado, Beverly; Tree, Douglas | To investigate these claims, we have constructed a GPU-accelerated Wang-Landau Monte Carlo algorithm that employs both configurational bias and bond breaking moves. | Session 64: Polymer Crystals and Crystallization |
| 1013 | Crystallization and self-nucleation of conjugated polymers | Fernandez-Ballester, Lucia; Hosseinabad, Ramin; Kuebler, Jesse | Here, we explore the role of molecular attributes on the crystallization behavior of poly-3-hexylthiophene under well-defined conditions. | Session 64: Polymer Crystals and Crystallization |
| 1014 | Paradigm on the Growth Kinetics of Lamellar Polymer Crystals | Hu, Wenbing | Paradigm on the Growth Kinetics of Lamellar Polymer Crystals | Session 64: Polymer Crystals and Crystallization |
| 1015 | Tuning Nanoparticle Dispersion to Control Confined Polymer Crystallization for Induced Ordering | Jimenez, Andrew; Al Torbaq, Abdullah; Müller, Alejandro; Kumar, Sanat | Tuning Nanoparticle Dispersion to Control Confined Polymer Crystallization for Induced Ordering | Session 64: Polymer Crystals and Crystallization |
| 1016 | Kinetics of Shape-fixing in Semicrystalline Shape-memory Networks | Yang, Jeh-Chang; Anthamatten, Mitchell | Kinetics of Shape-fixing in Semicrystalline Shape-memory Networks | Session 64: Polymer Crystals and Crystallization |
| 1017 | Controlling the Mechanical Behavior of Hydrogenated Polynorbornene | Klein, Jared; Register, Richard | In this talk, the effect of epimerization on both the stress-strain behavior and dynamic mechanical thermal properties are discussed. | Session 64: Polymer Crystals and Crystallization |
| 1018 | What happens upon annealing of pre-drawn semicrystalline polymers? | Smith, Travis; Wang, Shiqing | As part of efforts to understand mechanical behavior semicrystalline polymers under large deformation, we investigate what happens to predrawn semicrystalline polymers upon annealing at elevated temperatures. | Session 64: Polymer Crystals and Crystallization |
| 1019 | Entanglement Effect on Chain-Folding Structure in Semicrystalline Polymer Blends | Jin, Fan; Miyoshi, Toshikazu | In this study, we isothermally crystallize polymer blend samples consisting of long and short Poly(Lactic acid) chains from the melt state. | Session 64: Polymer Crystals and Crystallization |
| 1020 | Flow-Induced Crystallization of Polymers during Multi-Axial Deformation | Li, Liangbin | Considering the phenomenon of frustrating SIC for natural rubber during biaxial stretching, we proposed a new model for SIC based on the results of theoretical calculation and the in-situ X-ray scattering, which decoupled the free energy contributions of chain orientation from that of conformational entropy reduction. | Session 64: Polymer Crystals and Crystallization |
| 1021 | Homogeneous crystal nucleation – Nucleation kinetics and thermal stability of nuclei | Schick, Christoph; Adrianov, Ruslan; Mukhametzyanov, Timur; Androsch, Rene | We describe a method allowing to investigate the ability of nuclei to stabilize/grow on heating to the crystallization temperature [2] and, finally, to determine the thermal stability of homogeneous nuclei in polymers. | Session 64: Polymer Crystals and Crystallization |
| 1022 | Are Spherulites Spherical? 3D Visualization of Semicrystalline Polymer Morphology Using Optical Tomography | Yang, Shu-Gui; Wei, Zhen-Zhen; Ungar, Goran; Kazemi, Pantea; Xie, Hui-Jie; Cseh, Liliana; Saba, Hina | Here we present first such images obtained by confocal microscopy using appropriate sample preparation and image processing. | Session 64: Polymer Crystals and Crystallization |
| 1023 | Advanced Polymeric Particles Templated by Polymer Crystallization at Curved Liquid/Liquid Interface | Staub, Mark; Li, Christopher | This talk will focus upon using blends of amphiphilic block co-polymers in the miniemulsion process to template hierarchically structured crystalsomes. | Session 64: Polymer Crystals and Crystallization |
| 1024 | Phenomenological Theory of Prefreezing at the Solid-Melt Interface | Dolynchuk, Oleksandr; Tariq, Muhammad; Thurn-Albrecht, Thomas | We present a phenomenological theory of prefreezing and derive such equilibrium properties as the temperature dependent thickness of the prefrozen layer, the prefreezing temperature Tmax, and the mesoscopic jump of thickness at Tmax. | Session 64: Polymer Crystals and Crystallization |
| 1025 | Role of flow-induced nematic order in polyethylene nucleation | Zhang, Wenlin; Larson, Ronald | We employ united-atom molecular dynamics (MD) simulations to quantify the role of nematic order in polyethylene (PE) nucleation. | Session 64: Polymer Crystals and Crystallization |
| 1026 | Crystallization and liquid crystallinity in heptadecanylcarbazole-dithienylbenzothiadiazole (PCDTBT) conjugated polymers | Fair, Ryan; Gomez, Enrique | We use oscillatory shear rheology to demonstrate that PCDTBT exhibits liquid crystallinity by identifying the nematic to isotropic temperature. | Session 64: Polymer Crystals and Crystallization |
| 1027 | Analyzing morphological and optical properties of poly(3-hexylthiophene) (P3HT) via emitted light’s polarization | Nguyen, Huan; Araujo, Paulo | We study P3HT’s morphological and optical properties via measurements of absorption and polarization-resolved photoluminescence via Stokes spectroscopy. | Session 64: Polymer Crystals and Crystallization |
| 1028 | Computational Model for End-On LCEs | Waters, James; Balazs, Anna | We incorporate a theory of side-chain LCE’s into a constitutive model for elastomers to describe these competing effects. | Session 64: Polymer Crystals and Crystallization |
| 1029 | Dynamics of nanoparticles in polyelectrolyte solutions | Slim, Ali; Poling-Skutvik, Ryan; Conrad, Jacinta | Dynamics of nanoparticles in polyelectrolyte solutions | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1030 | Correcting the Generalized Stokes-Einstein Relation to Include Effects of Hydrodynamic Interactions from Periodic Images | Ethier, Jeffrey; Nourian, Pouria; Khare, Rajesh; Schieber, Jay | Here, we use an analytical solution for Stokes flow around a body-centered cubic array of spheres to introduce a correction factor to the generalized SE relation. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1031 | Resolving structure-property-dynamics relationships in model polymer nanocomposite systems | Yavitt, Benjamin; Salatto, Daniel; Huang, Zhixing; Endoh, Maya; Wiegart, Lutz; Fluerasu, Andrei; Zhang, Yugang; Fukuto, Masafumi; Li, Ruipeng; bocharova, Vera; Sokolov, Alexei; Koga, Tad | We use a combination of techniques to resolve the dynamics-structure-property relationships governing mechanical enhancement in a model PNC system of attractive SiO2 nanoparticles embedded in a glassy P2VP polymer matrix over a wide range of NP concentrations (1 – 25 vol. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1032 | Role of soft interactions in enhanced diffusivity of polymer-grafted nanoparticles in heterogeneous environments | Poling-Skutvik, Ryan; Conrad, Jacinta; Krishnamoorti, Ramanan | Here, we investigate the behavior of polymer-grafted nanoparticles (PGNPs), where the grafting to the nanoparticle surface causes a high self-concentration of the polymer chains. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1033 | Dynamic Behavior of Polystyrene Soft Nanoparticles by Neutron Spin Echo | Fischer, Jacob; Dadmun, Mark; Faraone, Antonio | Dynamic Behavior of Polystyrene Soft Nanoparticles by Neutron Spin Echo | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1034 | Universality in Microstructural Evolution of Deformed Polymer Melts as Revealed by Small-Angle Neutron Scattering and Molecular Dynamics Simulation | Xu, Wensheng; Lam, Christopher; Carrillo, Jan-Michael; Sumpter, Bobby; Wang, Yangyang | Our analysis suggests that interchain correlations play a fundamental role in nonlinear polymer melt rheology. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1035 | Nanoparticle effect on multiscale polymer dynamics in nanocomposites: insights from neutron and x-ray spectroscopy | Senses, Erkan | In our studies, we applied extensive neutron and x-ray scattering techniques, specifically backscattering, neutron spin echo, and x-ray photon correlation spectroscopy to gain microscopic insight on the role of nanoparticle size, shape, loading, dispersion state, polymer-particle interfaces and confinement on multiscale polymer dynamics as well as on slow nanoparticle relaxation in attractive nanocomposites [1, 2]. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1036 | Molecular Dynamics Simulations of a Polymer Star under Shear Flow | Carrillo, Jan-Michael; Wang, Yangyang; Sumpter, Bobby; Chen, Wei-Ren | Specifically, we calculate the star’s anisotropic single-molecule structure factor through the spherical harmonic expansion approach. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1037 | Dynamics and Rheology of THF Swollen Ionic Polymer Melts: Molecular Dynamics Simulation Study | Meedin, Shalika; Kosgallana, Chathurika; Senanayake, Manjula; Grest, Gary; Perahia, Dvora | We hypothesize that THF penetrates both hydrophilic and hydrophobic domains, affecting their interrelation. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1038 | Influence of Chain Architecture on the Kinetics of Chain Exchange Between BCC-Ordered Copolymer Micelles: A Dynamical Self-Consistent Mean-Field Theory Study | Holden, Mark; Wickham, Robert | Motivated by recent time-resolved small-angle neutron scattering results, we study the kinetics of symmetric ABA and BAB triblock copolymer exchange between BCC-ordered spherical micelles using dynamical self-consistent field theory simulations. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1039 | Revealing Structures and Dynamics of Bound Chains in Filler-Reinforced Elastomers | Salatto, Daniel; Yavitt, Benjamin; Endoh, Maya; Masui, Tomomi; Kishimoto, Hiroyuki; Carrillo, Jan-Michael; Taniguchi, Takashi; Nagao, Michihiro; Koga, Tadanori | In this presentation, using simplified industrialcarbon black (CB) filled polybutadiene in conjunction with contrast-matched neutron scattering and spectroscopy techniques, we resolve the buried structure at the nanometer-scale and the dynamics at the picosecond-to-nanosecond time scales in the polymer matrix. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1040 | The Effect of Rubbery/Glassy Block Copolymer Brushes on the Dynamic Behaviors of Silica Particles in Nanocomposite Elastomer | Cheng, Chao-Hung; Masuda, Shiori; Dechnarong, Nattanee; Fukada, Kento; Uno, Kiyu; Kamitani, Kazutaka; Hoshino, Taiki; Kojio, Ken; Takahara, Atsushi | In this study, X-ray photon correlation spectroscopy (XPCS) was utilized to analyze the dynamics of BCP- g-SiNP with inner poly(butyl acrylate) and outer poly(methyl methacrylate). | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1041 | The Role of Fast Relaxations in Cross-Linked Polymer Networks for Impact Mitigation | Soles, Christopher; Ito, Kanae; Burns, Adam; Tyagi, Madhusudan; Knorr, Daniel; Masser, Kevin; Lenhart, Joseph | Here we explore a series of model epoxy networks with moderate toughness to a series dicyclopentadiene networks which display incredible toughness deep into the glassy state. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1042 | Soft Matter Dynamics with Neutron Spin Echo Spectroscopy at the Spallation Neutron Source | Zolnierczuk, Piotr; Stingaciu, Laura-Roxana; Monkenbusch, Michael | We will show the capabilities of the SNS-NSE instrument and examples of soft matter experiments that have been performed using the SNS-NSE instrument. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1043 | Dynamics of multi-domain macro-molecules in the context of polymer physics | Stingaciu, Laura-Roxana; Urban, Volker | Our research aims for a deeper understanding of this challenging topic. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1044 | Length-Scale Dependence of Block Copolymer Segmental Dynamics | Hallinan, Daniel; Iyiola, Oluwagbenga; Hong, Kunlun; Goswami, Monojoy; Zolnierczuk, Piotr; Stingaciu, Laura-Roxana; Heller, William; Kim, Kyoungmin | This work examines the effect of interface proximity and tethering on polymer segmental motion. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1045 | Investigating the effect of salt on polymer dynamics in block copolymer electrolytes through neutron spin-echo spectroscopy | Loo, Whitney; Faraone, Antonio; Balsara, Nitash | Investigating the effect of salt on polymer dynamics in block copolymer electrolytes through neutron spin-echo spectroscopy | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1046 | Ion transport in solid polymeric lithium ion electrolytes | Steinrueck, Hans-Georg; Takacs, Christopher; Mackanic, David; Holladay, Benjamin; Kim, Hong Keun; Cao, Chuntian; Narayanan, Suresh; Dufresne, Eric; Chushkin, Yuriy; Zontone, Federico; Ruta, Beatrice; Will, Johannes; Borodin, Oleg; Sinha, Sunil; Srinivasan, Venkat; Toney, Michael | Towards this end, we present an investigation of lithium ion transport in a baseline SPE consisting of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in Poly(ethylene oxide) (PEO) via a combination of x-ray photon correlation spectroscopy (XPCS), x-ray absorption microscopy (XAM), continuum modelling, and molecular dynamics (MD) simulations. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1047 | Diffusion of Lithium Salt in Block Copolymer | Kim, Kyoungmin; Silverman, Micah; Hallinan, Daniel | We successfully applied the measurement technique using time-resolved Fourier Transform infrared – attenuated total reflectance (FTIR-ATR) spectroscopy to polymer electrolytes. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1048 | Unravelling the Interplay Between Structural Dynamics and Water Transport in Perfluorosulfonated Ionomer Nanocomposites Through the use of Neutron Scattering and Infrared Spectroscopy | Balwani, Apoorva; Domhoff, Allison; Tyagi, Madhusudan; Faraone, Antonio; Davis, Eric | In this study, neutron spin echo (NSE) spectroscopy and high flux backscattering (HFBS) spectroscopy were employed to probe changes in polymer segmental dynamics and water dynamics, respectively, while small-angle neutron scattering (SANS) was used to investigate the SiNP dispersion state. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1049 | Structure and dynamics of homogeneously and heterogeneously crosslinked PNIPAM microgels | Kyrey, Tetyana; Witte, Judith; Stingaciu, Laura-Roxana; Witt, Marcus; von Klitzing, Regine; Wellert, Stefan; Holderer, Olaf | In this contribution, microgel particles with homogeneous and heterogeneous crosslink distribution and different crosslinker concentrations will be studied with small angle neutron scattering (SANS) and neutron spin echo spectroscopy (NSE). | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1050 | Dynamics of polymeric additives in bicontinuous microemulsions adjacent to planar hydrophilic surfaces | Frielinghaus, Henrich; Lipfert, Frederik; Holderer, Olaf; Mattauch, Stefan; Monkenbusch, Michael; Arend, Nikolas; Richter, Dieter | We interpret the reduced relaxation times as the result of an interplay between the bending rigidity and the characteristic distance of the first surfactant membrane to the rigid interface, which causes the hydrodynamic and steric interface effects described in Seifert’s theory. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1051 | High shear rate rheology in microcapillary flow with SANS | Salipante, Paul; Murphy, Ryan; Dharmaraj, Vishnu; Weigandt, Katie; Hudson, Steven | High shear rate rheology in microcapillary flow with SANS | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1052 | In-Situ/Operando X-ray Photon Correlation Spectroscopy Studies of Polymer Dynamics During 3D-Printing of Dual-Cure Polymer Epoxy | Petrash, Stanislas | The present study shows that an in-situ/ operando XPCS is not only an excellent technique for comprehensive, quantitative characterization of 3D printing processes, but also provides an unprecedented opportunity to perform studies of a wide variety of nonequilibrium phenomena of polymeric materials under external stimuli. | Session 65: Polymer Dynamics at the Nano-to Meso-Scale Revealed by X-ray and Neutron Spectroscopy |
| 1053 | Nanoparticle Structure and Dynamics in Polymer Nanocomposites | Hore, Michael | This talk will review recent work we have performed to study the behavior of nanoparticles in nanocomposite materials, with a focus on nanorods and nanospheres. | Session 66: Polymer Nanocomposites: Dynamics |
| 1054 | Hybrid nanoparticles with continuously tunable scattering length density for the analysis of phase separation in mixed colloidal systems | Zhai, Yue; Han, Jin; Wu, Wenjie; Matyjaszewski, Krzysztof; Karim, Alamgir; Bockstaller, Michael | A method enabling the continuous variation of the scattering length density of nanoparticles will be presented and its application to the SANS analysis of phase separation in mixed brush particle systems will be demonstrated. | Session 66: Polymer Nanocomposites: Dynamics |
| 1055 | Fast solvent induced switchable phase-states of binary polymer-grafted nanoparticle blends | Wu, Wenjie; Singh, Maninderjeet; Wang, Xiaoteng; Zhai, Yue; Wang, Zongyu; Terlier, Tanguy; Matyjaszewski, Krzysztof; Bockstaller, Michael; Karim, Alamgir | To this end, we developed a method to switch the state of phase-separated structures in a binary blend film of PGNPs, poly (methyl methacrylate) silica (PMMA-SiO 2) and poly(styrene) silica (PS-SiO 2), by using a direct solvent immersion annealing (DIA) method. | Session 66: Polymer Nanocomposites: Dynamics |
| 1056 | PEO / SiO2 nanocomposites: Correlating Polymer Morphology to Rheological Properties | Chrissopoulou, Kiriaki; Kogchylakis, Sokratis; Anastasiadis, Spiros | In this work we report on the rheological behavior of a series of poly(ethylene oxide) / silica, PEO/SiO 2, nanocomposites through oscillatory shear rheology measurements. | Session 66: Polymer Nanocomposites: Dynamics |
| 1057 | Decoupling the polymer dynamics and the nanoparticle network dynamics of polymer nanocomposites through dielectric spectroscopy and rheology | Cheng, Shiwang; Yang, jie; Yang, wei | Detailed analyses show that the rheology captures both the contributions of the polymer matrix and the nanoparticle network while dielectric measurements are only sensitive to polymer matrix dynamics. | Session 66: Polymer Nanocomposites: Dynamics |
| 1058 | Segmental dynamics in matrix-free polymer grafted nanoparticles | Jhalaria, Mayank; Ruzicka, Eric; Tyagi, Madhusudan; Garcia-Sakai, Victoria; Benicewicz, Brian; Kumar, Sanat | We focus on the segmental and local dynamics of polymer chains using spatial and temporally sensitive probes with the view of identifying the primary dynamic driving force for penetrant transport in polymers. | Session 66: Polymer Nanocomposites: Dynamics |
| 1059 | Modeling the Entanglement Distribution in Polymer-grafted Nanoparticle Systems | Tannenbaum, Robert; Mikami, Taiji; Maurel, Gaetan; Couty, Marc; Kumar, Sanat | A computational modeling technique was developed that utilizes slipsprings to model the mobility constraints that physical entanglements impose on individual polymer chains. | Session 66: Polymer Nanocomposites: Dynamics |
| 1060 | Disentangling the role of chain conformation on the mechanics of polymer grafted nanoparticle materials | Midya, Jiarul; Cang, Yu; Egorov, Sergei; Matyjaszewski, Krzysztof; Bockstaller, Michael R.; Nikoubashman, Arash; Fytas, George | Disentangling the role of chain conformation on the mechanics of polymer grafted nanoparticle materials | Session 66: Polymer Nanocomposites: Dynamics |
| 1061 | Suppression of Creep in Model Polymer Nanocomposites | Yang, Entao; Pressly, James; Bailey, Eric; Natarajan, Bharath; Mohan, Aruna; Winey, Karen; Riggleman, Robert | In this work, we use molecular dynamics simulation to investigate the PNC’s creep response with different NP sizes and polymer-nanoparticle interactions. | Session 66: Polymer Nanocomposites: Dynamics |
| 1062 | Nanoparticles with controllable dispersion and localization in immiscible polymer blends | Alkhodairi, Husam; Russell, Sebastian; Pribyl, Julia; Benicewicz, Brian; Kumar, Sanat | Here, we will show that the location of polystyrene-grafted NPs within an immiscible blend of polymethyl methacrylate (PMMA)/polystyrene (PS) can be determined using σN 0.5, the brush crowding parameter, and, 1/α, which describes the entropic effects associated with a mismatch in brush/matrix polymer chain lengths. | Session 66: Polymer Nanocomposites: Dynamics |
| 1063 | Polymer/Star-Polymer composites: structure and dynamics of bulk and confined materials | Fan, Jinpeng; Douglas, Jack; Starr, Francis | We investigate how both the number of arms and molecular weight affect the morphology of self-assembled structures in both a bulk polymer material and an ultra-thin polymer film. | Session 66: Polymer Nanocomposites: Dynamics |
| 1064 | Tuning structure and dynamics of segmented ionenes with added spherical nanoparticles | Liesen, Nicholas; Hall, Lisa | Using efficient coarse-grained molecular dynamics simulations, we aim to establish architecture-structure-property relationships to guide synthetic efforts. | Session 66: Polymer Nanocomposites: Dynamics |
| 1065 | Molecular Dynamics Study of Structural and Flow properties of Polyelectrolyte-Grafted Nanoparticles in Solution | Medidhi, Koteswararao; Akcora, Pinar; Padmanabhan, Venkat | Here, we investigate the structural and ow properties of polyelectrolyte grafted nanoparticles (PENP) in a solution using coarse-grained molecular dynamics simulations. | Session 66: Polymer Nanocomposites: Dynamics |
| 1066 | Designing Polymer Nanocomposites: Critical Role of the Interfacial Layer | Sokolov, Alexei | At the end, we present a general picture how microscopic parameters control the interfacial layer, and how by tuning the interfacial layer we can tune macroscopic properties of polymer nanocomposites. | Session 67: Polymer Nanocomposites: Interfaces |
| 1067 | Dynamics in polymer and polymer-grafted nanocomposites: it’s the interfacial zone after all | Mapesa, Emmanuel; Street, Dayton; Kilbey II, S. Michael; Sangoro, Joshua | By systematically examining nanocomposites based on non-functionalized Si NPs dispersed in PMMA matrices and on PMMA-grafted Si NPs in PMMA matrices, we investigate the effects of interfacial interactions and confinement in each of these cases on Tg and the time-scales as well as breadth of the corresponding dielectric relaxations. | Session 67: Polymer Nanocomposites: Interfaces |
| 1068 | Theory of coupled activated relaxation in dense polymer-particle mixtures: effects of size ratio, particle loading and interfacial attraction | Zhou, Yuxing; Schweizer, Kenneth | Here we study the dynamics of polymer nanocomposites using the Elastically Collective Nonlinear Langevin Equation (ECNLE) theory with structural correlations obtained from Polymer Reference Interaction Site Model (PRISM) approach. | Session 67: Polymer Nanocomposites: Interfaces |
| 1069 | The interfacial zone around nanoparticles in polymer nanocomposites and in thin polymer films | Zhang, Wengang; Emamy, Hamed; Pazmino Betancourt, Beatriz; Vargas-Lara, Fernando; Starr, Francis; Douglas, Jack | We perform coarse-grained simulations of polymer materials to quantify the range over which interfaces alter the structure and dynamics near the interface. | Session 67: Polymer Nanocomposites: Interfaces |
| 1070 | Polymer NanoComposites, Interfaces and Data | Brinson, Catherine | In this work, both experimental characterization and development of a data framework and infrastructure is presented. | Session 67: Polymer Nanocomposites: Interfaces |
| 1071 | Chemical Heterogeneities and Architectures of Interfacial Layers in Polymer Nanocomposites | Wu, Di; Yang, Siyang; Akcora, Pinar | We investigate the effect of chemical heterogeneities and varying chain architectures around nanoparticles on tuning the dynamics of interfacial polymers, hence the mechanical properties such as thermal-stiffening. | Session 67: Polymer Nanocomposites: Interfaces |
| 1072 | Interfacial mechanics and viscoelastic properties of patchy graphene oxide reinforced nanocomposites | Meng, Zhaoxu | To address this issue at spatiotemporal scales beyond atomistic simulations, we employ recently developed coarse-grained models of GO sheet and polybutadiene to model patchy GO sheets and a representative GO/polybutadiene nanocomposite with GO sheets serving as fillers. | Session 67: Polymer Nanocomposites: Interfaces |
| 1073 | Theory and Simulation of Polymer Brushes – Interaction and Structure | Adhikari, Sabin; Kumar, Sanat | In this study, we focus on the fundamental aspects of the interactions and structure of polymer brushes in either a poor solvent (i.e., incorporating compressibility effects in the brush) or in a (compressible) polymer-matrix. | Session 67: Polymer Nanocomposites: Interfaces |
| 1074 | Aggregation of Grafted Nanoparticles in a Polymeric Matrix | Koh, Clement; Grest, Gary; Kumar, Sanat | Aggregation of Grafted Nanoparticles in a Polymeric Matrix | Session 67: Polymer Nanocomposites: Interfaces |
| 1075 | Surface Segregation and Wetting of Nanoparticles in Polymer Nanocomposites | Maguire, Shawn; Demaree, John Derek; Bilchak, Connor; Krook, Nadia; Boyle, Michael; Pana, Andreea-Maria; Rannou, Patrice; Maréchal, Manuel; Ohno, Kohji; Composto, Russell | Studies are performed above and below the critical point of this LCST system to decouple the thermodynamic and interfacial energy contributions. | Session 67: Polymer Nanocomposites: Interfaces |
| 1076 | Initial Solvent-Driven Nonequilibrium Effect on the Adsorption Layer of Polymer Nanocomposites | Oh, Sol Mi; Abbasi, Mozhdeh; Shin, Tae Joo; Saalwaechter, Kay; Kim, So Youn | In this work, we report that the initial dispersing solvent, which is not present in final PNCs, induces nonequilibrium effects on polymer chain dynamics at interfaces. | Session 67: Polymer Nanocomposites: Interfaces |
| 1077 | Silicone-Iron Oxide Nanocomposite Encapsulants for Common Mode Noise Reduction in Switching Power Electronics | Carlton, Hayden; Whitt, Reece; Deshpande, Amol; Myane, Sarah; Akey, Noah; Huitink, David | In the study presented herein, iron oxide nanoparticles were incorporated into a silicone rubber matrix to create an electomagnetically-susceptible nanocomposite in an effort to reduce common mode noise. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1078 | Flexible Textured Nanocomposite for Energy Harvesting Applications | Ghai, Viney; Singh, Harpreet; Agnihotri, Prabhat | The present study provides a method for designing and fabricating a multifunctional flexible absorber (flexorb) that can be used as a coating material for ultra-high absorption applications. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1079 | Nanoparticle Assembly Modulated by Biobased Polymers and Its Coating Application | Olson, Emily; Li, Yifan; Lin, Fang-Yi; Miller, Ana; Liu, Fei; Tsyrenova, Ayuna; Curtzwiler, Greg; Vorst, Keith; Cochran, Eric; Jiang, Shan | We study how nanoparticles assemble in a dried film containing biobased polymers. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1080 | Coarse-grained molecular dynamics simulations on mechanical properties of polymer composites for bulk heterojunction solar cells | Yoshimoto, Yuta; Sugiyama, Sou; Kaneko, Toshihiro; Takagi, Shu; Kinefuchi, Ikuya | We investigate mechanical properties of polymer composites of poly(3-hexylthiophene) (P3HT) and fullerene C 60 using coarse-grained molecular dynamics (CGMD) simulations, where the P3HT monomer unit and C 60 are represented by three CG beads and a single CG bead. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1081 | Nanoparticle Templating of Ultrathin and High Density 6 nm Pore Arrays | Jackson, Grayson; Lin, Xiao-Min; Jaeger, Heinrich | We demonstrate an alignment-free method to transform freely suspended nanoparticle (NP) monolayer sheets into mechanically robust, high density 6 nm pore arrays using electron beam irradiation and subsequent wet chemical etching. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1082 | Gas Transport of Self-assembled Polymer Nanocomposites with Binary Nanoparticle Size | Chan, Sophia; Jhalaria, Mayank; Jimenez, Andrew; Russell, Sebastian; Benicewicz, Brian; Kumar, Sanat | We present the self-assembled morphologies and measured gas transport properties of these polymer nanocomposites with binary core sizes. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1083 | Polymer Composites of Two-Dimensional Layered Materials for Structural Applications | Ozden, Sehmus; Dutta, Nikita S.; Randazzo, Katelyn; Arnold, Craig; Priestley, Rodney | Here, we report the development of highly porous, ultralight-weight and flexible polymer composite of 2D-layered structures for high temperature environmental applications. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1084 | Mesostructured Metal Superconductors via Block Copolymer Nanocomposites: Quantum Metamaterials from Soft Matter | Thedford, Randal; Gruner, Sol; Wiesner, Ulrich | Future work will investigate emergent phenomena such as angle-dependent magnetization behavior, and expansion of our technique to other metals could lead to novel photonic, electronic, and/or catalytic properties. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1085 | Experiments and Simulations of Nanoplate String Assembly in Lamellar Diblock Copolymer | Composto, Russell; krook, nadia; Tabedzki, Christian; Yager, Kevin; Elbert, Katherine; Murray, Christopher; Riggleman, Robert | These assemblies are studied using X-ray scattering, electron microscopy, and hybrid particle/self-consistent field theory (hSCFT) simulations. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1086 | Molecular engineering of graft and matrix polymers for tuning grafted particle dispersion in polymer nanocomposites: A theory and simulation study | Kulshreshtha, Arjita; Jayaraman, Arthi | In this talk we present our work using molecular simulations and theory showing how increasingly attractive graft-matrix interactions affect the interpenetration of matrix and graft chains (termed as grafted layer wetting) and the dispersion/aggregation of grafted particles in the matrix. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1087 | Polymer grafted nanoparticles on Polymer Films: Entropic and Enthalpic effects on strcture and dynamics | Basu, Jaydeep; Anthuparambil, Nimmi Das; Swain, Aparna | Here we report thermal stability and the corresponding microscopic dynamics of polymer supported ultra-thin membranes comprising of self-assembled, ordered grains of polymer grafted nanoparticles having tunable mechanical properties. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1088 | Gradient-Based Explicit Theoretical Framework for Simulation of Block Copolymer-Nanoparticle Co-assembly | Bochkov, Daniil; Gibou, Frederic | In this talk, we present a novel theoretical framework for the simulation of the block copolymer-nanoparticle co-assembly. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1089 | Relating Entanglements and Toughness in Model Polymer-Grafted Nanoparticles | Hall, Lisa | To guide materials design, we use coarse-grained molecular dynamics (MD) simulations to relate these parameters to structure, entanglements, and mechanical properties. | Session 68: Polymer Nanocomposites: Structure and Property |
| 1090 | Formation of Pickering Emulsions Using Nanodiamonds | Farias, Barbara; Brown, Derek; Hearn, Allison; Khan, Saad | We examine here the use of nanodiamonds (ND), a relatively novel carbonaceous filler with high adsorption activity, small size, and large surface area to create solid stabilized emulsions. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1091 | Utilizing Inorganic Nanoadditives to Influence the Surface Properties of Polymer Films | Anastasiadis, Spiros; Krasanakis, Fanourios; Theodorakis, Antigonos; Chrissopoulou, Kiriaki | In this work, we report on the development of superhydrophobic and water repellent polymer coatings by utilizing nanoadditives of different geometries and size. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1092 | Interfacial Dynamics of Confined Microgel Liquids on Soft Surfaces | Lin, Kehua; Zhu, Yingxi Elaine | In this work, we employed poly(N-isopropylacrylamide) (PNIPAM) microgels of varied crosslinking density as the confined liquids as well as confining surface coatings. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1093 | How osmotic pressure governs sliding and surface structures of swollen crosslinked hydrogels | Bonyadi, Shabnam; Johnson, Christopher; Kim, Jiho; Reale, Erik; Atten, Michael; Dunn, Alison | Here I present two vignettes of the role of osmotic pressure in understanding hydrogel lubrication. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1094 | Bio-inspired surface modification of PDMS to reduce dry friction | Wang, Mengyuan; Ghosh, Sujan; Blevins, Adrienne; Stafford, Christopher; Kilgore, Jason; Huang, Sijia; Zou, Min; Ding, Yifu | This study aims to mimic such functional skins by modifying both the stiffness and topography of the elastomeric surfaces. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1095 | Friction and wear of polyzwitterionic brush-grafted surfaces | Serfass, Christopher; Roe, Emily; Hsiao, Lilian | Inspired by the hydrophilic biomacromolecules adsorbed to the surface of articular cartilage, we investigate the tribology of betainized poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes grafted on soft poly(dimethyl siloxane) (PDMS) and hard silicon substrates. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1096 | Surface Forces Apparatus Measurements Between Oppositely Charged Polyelectrolyte Brushes as a Function of Ionic Strength | Mastropietro, Dean; Tirrell, Matthew | Surface Forces Apparatus Measurements Between Oppositely Charged Polyelectrolyte Brushes as a Function of Ionic Strength | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1097 | Tribology of soft colloidal microgels: An oral perspective | Sarkar, Anwesha | A case study 4 will be presented on how these microgels can act as viscosity modifiers of the continuum, where the lubrication performance can be quantitatively described using the Newtonian plateau value ( η ∞). | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1098 | Pore-size dependence and glassy behavior of hydrogel friction on smooth surfaces | Cuccia, Nicholas; Pothineni, Suraj; Wu, Brady; Burton, Justin | Using a custom-built, continuous pin-on-disc tribometer, here we identify three distinct regimes of frictional behavior for both polyacrylamide (PAAm) and agarose hydrogel spheres on smooth surfaces. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1099 | Study of the tribological behavior of hydrogel-like materials with an extended Surface Forces Apparatus | Espinosa-Marzal, Rosa; Shoaib, Tooba | In this talk, we will present steady and dynamic shear measurements with an extended surface forces apparatus (eSFA) on hydrogel thin films under modulated compression. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1100 | Indentation of a microparticle into an oil-coated, soft silicone surface | Glover, Justin; Pham, Jonathan | A simple model that balances the capillary force of the oil layer with the elastic force from the substrate is proposed to predict the position of the particle. | Session 69: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1101 | Effect of Molecular Architecture on the Conformational Relaxation for Interfacial Polymer Chains | Nguyen, Hung; Kawaguchi, Daisuke; Tanaka, Keiji | Using sum-frequency generation spectroscopy, we here report the thermal annealing effect on chain conformations of polystyrene (PS) with different molecular architecture near at the quartz interface. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1102 | In Situ Synchrotron Radiation X-ray Scattering Evaluation of Domain Size and Spacing of Thermoplastic Elastomer under Elongation | Dechnarong, Nattanee; Kamitani, Kazutaka; Cheng, Chao-Hung; Masuda, Shiori; Nozaki, Shuhei; Nagano, Chigusa; Amamoto, Yoshifumi; Kojio, Ken; Takahara, Atsushi | In Situ Synchrotron Radiation X-ray Scattering Evaluation of Domain Size and Spacing of Thermoplastic Elastomer under Elongation | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1103 | Structure and Physical Properteis of Zwitter Ionic Polyelectrolyte Brushes at Aquesous Interface | Takahara, Atsushi | In this presentation, our recent researches on control of wettability and adhesion through precise design of polyelectrolyte brush surfaces are presented. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1104 | Highly Branched Polymers with High Ether Oxygen Content for Membrane CO2/N2 Separation | Lin, Haiqing | This work demonstrates that harnessing the interactions between polymers and CO 2 may provide unprecedented opportunities in designing gas separation membranes with robust performance under practical conditions. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1105 | Protein Resistant Property of Nanometer-Scale Architecture of Polymer Chains | Endoh, Maya; Salatto, Daniel; Huang, Zhixing; Koga, Yuto; Bajaj, Yashasvi; Yavitt, Benjamin; Carrillo, Jan-Michael; Nykypanchuk, Dmytro; Koga, Tad | We recently reported that a few nanometer-thick polymer layer formed on a solid, which consists of physisorbed non-charged homopolymer chains, exhibits anti-fouling properties against a model protein, bovine serum albumin (BSA), independent of polymer hydrophilicity/hydrophobicity[1]. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1106 | Linear vs Star polymers in Hydrogen-Bonded Assemblies | Aliakseyeu, Aliaksei; Ankner, John; Sukhishvili, Svetlana | We report on the effect of the molecular architecture of poly(ethylene oxide), PEO (linear vs. 6-arm polymer, lPEO and sPEO, respectively) and molecular weight of poly(methacrylic acid) (PMAA) on hydrogen-bonding assembly of these polymers. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1107 | Effect of Branches and Cycles on Polymer Melt Surface Dynamics | Foster, Mark | We have studied the surface fluctuations with X-ray Photon Correlation Spectroscopy for melts of well-defined, anionically polymerized polystyrenes of various architectures, including linear, 6 arm star, pom-pom, comb and cyclic architectures. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1108 | Dilute solution structure of bottlebrush polymers | Dutta, Sarit; Pan, Tianyuan; Wade, Matthew; Walsh, Dylan; Rogers, Simon; Guironnet, Damien; Sing, Charles | We present results from Brownian Dynamics and Monte Carlo simulations on bottlebrush conformations in dilute solution, emphasizing the role of side chain length and grafting density on the size, shape, and intramolecular structure of a bottlebush molecule. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1109 | Morphology and Dynamics of Catenanes in Dilute Solutions and at Liquid/Liquid Interface | Akbari, Saeed; Khani, Shaghayegh; Maia, Joao; Tsige, Mesfin | This includes the comprehensive study of the effect of chain flexibility, solvent quality and interface as deterministic factors that influence the morphology and dynamics of the catenanes. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1110 | Bottlebrush Polymers in the Melt and Polyelectrolytes in Solution Share Common Structural Features | Sarapas, Joel; Martin, Tyler; Chremos, Alexandros; Douglas, Jack; Beers, Kathryn | Correspondingly, we constructed a library of isotopically labeled bottlebrush molecules and measured the bottlebrush correlation peak position q* = 2 π / ξ by neutron scattering and simulations. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1111 | Effect of Chain Architecture on the Structure, Diffusion, and Swelling in Thin Polymer Films | Akgun, Bulent; Kirevliyasi, Makbule; Caglayan, Ayse; Hong, Kunlun; Uhrig, David; Koga, Tadanori; Yuan, Guangcui; Satija, Sushil | In this work, we have investigated the role of chain architecture on the adsorption, diffusion and swelling in supercritical carbon dioxide (ScCO 2) using well-defined linear, star, centipede and comb polystyrene (PS). | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1112 | Molecular conformation of rigid cyclic and branched polymers in solution | Terao, Ken | We found that local helical structure for the cyclic polymers are appreciably extended and therefore the main chain is more flexible than that for the corresponding linear chain. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1113 | Scattering from Melts of Combs and Bottlebrushes: Molecular Dynamics Simulations and Theoretical Study | Liang, Heyi; Wang, Zilu; Dobrynin, Andrey | We use coarse-grained molecular dynamics simulations to establish correlations between peak position in the static structure factor S(q) of combs and bottlebrushes in a melt and their architectural parameters such as degree of polymerization of the side chains n sc and number of backbone bonds n g between side chain grafting points. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1114 | Impact of Architectural Asymmetry on Frank-Kasper Phase Formation in Block Polymer Melts | Chang, Alice; Bates, Frank | In this talk, we will discuss the connections between molecular architecture and symmetry selection in block polymers. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1115 | Molecular architecture directs linear-bottlebrush-linear triblock copolymers self-assemble to soft, reprocessable elastomers | Nian, Shifeng; Lian, Huada; Gong, Zihao; Zhernenkov, Mikhail; Qin, Jian; Cai, Liheng | Molecular architecture directs linear-bottlebrush-linear triblock copolymers self-assemble to soft, reprocessable elastomers | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1116 | Structure of bottlebrush polymers end-grafted to a planar surface | Paturej, Jaroslaw; Jungmann, Paul; Sommer, Jenz-Uwe; Kreer, Torsten | We conducted coarse-grained molecular dynamics simulations and scaling theory of the equilibrium structure of planar brushes formed by bottlebrush polymers. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1117 | Self-assembly of Bottlebrush Amphiphilic Polymers Near/On Surfaces: Coarse-grained Molecular Dynamics Simulation Study | Wessels, Michiel; Jayaraman, Arthi | In this talk, we will present our recent work using coarse-grained molecular dynamics simulations to elucidate how branched polymer architecture affects the assembly in solutions of amphiphilic block copolymers near/on surfaces. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1118 | Effects of Ionic Groups on Dynamics of Linear-Star Polymer Blends: A Molecular Dynamics Simulation Study | Senanayake, Manjula; Grest, Gary; Perahia, Dvora | We find that for non-charged blends the short linear and star polymer chains are miscible. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1119 | Complete photonic band gaps with nonfrustrated ABC bottlebrush copolymers | Lequieu, Joshua; Delaney, Kris; Fredrickson, Glenn | To achieve this, we have developed a computational tool that couples self-consistent field theory (SCFT) simulations to Maxwell’s equations, thereby permitting a direct link between molecular design, self-assembly and the resulting photonic band structure. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1120 | Polydispersity Stabilized Complex Morphologies in Poly(styrene-b-methyl methacrylate) Diblock Copolymers | Kim, Inho; Li, Sheng | In this study, we synthesized a series of poly(styrene- b-methyl methacrylate) (PS-PMMA) diblocks where dispersity of both blocks were systematically varied. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1121 | Molecular Design of Post-functionalizing Block Copolymers for Versatile Morphologies | Hayakawa, Teruaki; Yamazaki, Seina; Yoshimura, Yasunari; Nabae, Yuta | In this study, we demonstrated a new approach for creating bicontinuous microphase-separated structures using the post-functionalization of side-chain type block copolymers. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1122 | Poly(Styrene-block-Glyicdyl Methacrylate-block-Methyl Methacrylate) as a Versatile Platform for Exploring the Phase Diagram of Linear Triblock Copolymers | Wylie, Kevin; Dong, Lei; Nabae, Yuta; Hayakawa, Teruaki | We have designed a new linear triblock consisting of poly(styrene- b-glycidyl methacrylate- b-methyl methacrylate) as a new platform for exploring the phase diagram of linear triblock copolymers. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1123 | Helical sense of wrapped belts in star terpolymers via slice and view scanning electron microscopy | Shan, Wenpeng; Feng, Xueyan; Polymeropoulos, George; Hadjichristidis, Nikos; Thomas, Edwin | We study the self-assembly behavior of well-defined 3-miktoarm star terpolymers consisting of polyisoprene (PI), polystyrene (PS), and poly(2-vinylpyridine) (P2VP), (PI) 2-b-PS-b-P2VP. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1124 | Molecular dynamics simulations and neutron scattering provide an atomistic level understanding of the self-assembly of poloxamines | Ziolek, Robert; Gonzalez-Gaitano, Gustavo; Dreiss, Cecile; Lorenz, Christian | By integrating molecular dynamics simulations and neutron scattering, we have studied different poloxamines (Tetronics), a family of star-shaped block copolymers that show promise as controlled release drug delivery agents. | Session 70: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1125 | Solvent-Non-Solvent Rapid Injection for the Preparation of Hierarchically Ordered Hydrogels | Hickey, Robert | We have developed a universal and quantitative method for producing physically crosslinked hydrogels exhibiting tunable mechanical properties superior to typical physically crosslinked triblock copolymer hydrogels, and interesting structural color properties. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1126 | Understanding and controlling metal oxide growth within block copolymers | Shomrat, Neta; Weisbord, Inbal; Azoulay, Rotem; Barick, Barun; Simon, Assaf; Segal-Peretz, Tamar | Here we investigate the principles that govern SIS growth in homopolymers and block copolymers using cominnation of in situ growth characterization, 3D TEM tomography, and quantum mechanical calculations. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1127 | Process-directed self-assembly: Do we understand the collective short-time dynamics in multicomponent polymer melts? | Mueller, Marcus | Examining simple, prototypical examples, we highlight the role of internal modes and indicate how dynamic SCFT can be generalized to include the consequences of the subdiffusive single-chain dynamics for the collective kinetics on times comparable to the Rouse-relaxation time. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1128 | Nonsolvent Induced Phase Separation in Polymer Droplets | Tree, Douglas; Alhasan, Rami; Banks, Dakota; Wilcoxson, Tanner | In our approach, we use simulations of a phase-field model of a polymer solution to examine the effect of mass transfer, hydrodynamics and geometry on the formation of microstrucure. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1129 | Arrested mobility and thermal fluctuation effects on the mass transfer induced phase separation of ternary polymer solutions | Garcia, Jan Ulric; Tree, Douglas; Iwama, Tatsuhiro; Delaney, Kris; Fredrickson, Glenn | In this work, we use phase-field models of the ternary polymer-nonsolvent-solvent system to solve the coupled convection-diffusion and momentum equations that describe membrane formation. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1130 | Precision polymer nanoparticles | O’Reilly, Rachel | PISA offers an elegant solution to the tedious procedures of conventional self-assembly by forming the particles in situ as the polymerization progresses. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1131 | Molecular Modeling of Poly(methylmethacrylate-block-acrylonitrile) as Precursors of Porous Carbon Fibers | Hao, Xi; Serrano, Joel; Liu, Tianyu; Khan, Assad Ullah; Botset, Brandon; Stovall, Benjamin; Xu, Zhen; Guo, Dong; Cao, Ke; Liu, Guoliang; Cheng, Shengfeng | To expedite materials discovery, we perform molecular dynamic simulations for a series of poly(methylmethacrylate- block-acrylonitrile) (PMMA- b-PAN) with various block molecular weights and develop a model to characterize the morphology and compute the interfacial area of PMMA- b-PAN melts. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1132 | Phase diagram for diblock copolymer melts from Langevin field-theoretic simulations | Beardsley, Tom; Matsen, Mark | Here, we apply Langevin FTS (L-FTS) to AB diblock copolymer melts, where the composition field fluctuates via Langevin dynamics but the saddle-point approximation is still applied to the pressure field that enforces incompressibility. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1133 | Entanglements in block copolymers self-assembled into lamellae morphology | Garcia, Nicolas; BARRAT, Jean-Louis | In this work, we investigate the viscoelastic properties of BCPs when segregating in a lamellar morphology. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1134 | Systematic construction of the dynamic density functional theory for inhomogeneous polymer systems | Mantha, Sriteja; Schmid, Friederike | In this talk, we will put forward a physically motivated approach to compute the Λ αβ(r,r’) with the objective to improve the DDFT predictions. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1135 | Spectrally-Accurate Linear-Scaling Self Consistent Field Theory and Applications | Vigil, Daniel; Garcia-Cervera, Carlos; Delaney, Kris; Fredrickson, Glenn | We present a new algorithm for numerical polymer self-consistent field theory (SCFT) that has spectral accuracy in the contour dimension while maintaining near-linear computational cost scaling with number of contour sample points, which no other reported algorithm achieves. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1136 | Open-source SCFT on graphics processing units | Cheong, Guo Kang; Chawla, Anshul; Morse, David; Dorfman, Kevin | We present a GPU-accelerated self-consistent field solver parallel to the open-source Polymer Self-Consistent Field (PSCF) codebase. | Session 71: Processing-Dependent Nanoscale Structures in Polymers and Predictive Methods |
| 1137 | Mechanical Metamaterials You Can Count On | Munck, Mathis; Bense, Hadrien; Van Hecke, Martin | Here we present a class of structures whose state depends on a sequence of identical input cycli: these metamaterials count. | Session 72: Programmable Matter |
| 1138 | Multifunctional Combinatorial Metamaterials | Coulais, Corentin | We introduce a novel class of combinatorial metamaterials that are multifunctional. | Session 72: Programmable Matter |
| 1139 | A truly-programmable mechanical metamaterial using magnetic actuation | Chen, Tian; Pauly, Mark; Reis, Pedro | Here, we show a truly-programmable metamaterial where both the periodicity and the internal structure are preserved during fabrication but each unit cell can be independently programmed and reprogrammed, reversely and on-demand. | Session 72: Programmable Matter |
| 1140 | One Dimensional Mechanical Memory | Reid, Austin; Daniels, Karen; Jules, Théo; Lechenault, Frederic; Mungan, Muhittin | We have developed laser-cut and folded cylinders where adjacent unit cells can either be elastically connected or completely decoupled. | Session 72: Programmable Matter |
| 1141 | Muscle-inspired flexible mechanical logic architecture for miniature robotics | Agrawal, Mayank; Glotzer, Sharon | Here we demonstrate such an architecture, which computes combinatorial logic via mechanical gates that use linear actuation (expansion and contraction). | Session 72: Programmable Matter |
| 1142 | Active stabilisation of patterned robotic swarms | Popli, Pankaj; Perlekar, Prasad; Sengupta, Surajit | We propose an algorithm where one can achieve this is an energy efficient way. | Session 72: Programmable Matter |
| 1143 | Assembly by Solvent Evaporation: Equillibrium Clusters and Relaxation Times | Macias, Elizabeth; Travesset, Alex; Waltmann, Thomas | We present a theoretical and computational description of equillibrium clusters of alkylthiolated gold nanocrystals assembled by solvent evaporation. | Session 72: Programmable Matter |
| 1144 | Reprogrammable phononic metasurfaces | Bilal, Osama | Here, we present a reporgrammable metamterial platform for manipulating phonons utilizing all the aforementioned wave manipulation mechanisms [Foehr and Bilal et al.,PRL, 2018]. | Session 72: Programmable Matter |
| 1145 | Synthetic Mechanoreceptors with Collocated Logic | Udani, Janav; Arrieta, Andres | We present a new class of synthetic mechanoreceptor exhibiting large changes in conductivity as a function of their shape. | Session 72: Programmable Matter |
| 1146 | Sending Signals Through Mechanical Wiring | Berry, Michelle; Hayward, Ryan; Santangelo, Christian | We consider a mechanical “wire”, a series of bistable units that interact with each other, as a way to connect the output of one logic gate to the input of another logic gate. | Session 72: Programmable Matter |
| 1147 | Training for desired Folding Pathways in Self Folding Origami | Arinze, Chukwunonso; Stern, Menachem; Nagel, Sidney; Murugan, Arvind | In this way, we find that physical folding, combined with a plasticity rule for crease stiffness, can naturally arrive at design parameters needed for non-linear behaviors that are hard to predict otherwise. | Session 72: Programmable Matter |
| 1148 | Computational wrapping: A novel method for wrapping 3D-curved surfaces with brittle, nonstretchable materials for conformable devices | Lee, Yu-Ki; Lien, Jyh-Ming; Choi, In-Suk | In this talk, we propose a novel method to make conformable devices on non-zero Gaussian surfaces, i.e. flexible devices that can be transformed into any complex 3-dimensional shape. | Session 72: Programmable Matter |
| 1149 | How to weave a perfect sphere with curved strips | Baek, Changyeob; Martin, Alison; Chen, Tian; Poincloux, Samuel; Ren, Yingying; Panetta, Julian; Pauly, Mark; Reis, Pedro | Taking an alternative point of departure, we introduce a novel approach for triaxial weaving that enables us to continuously span a variety of 3D shapes of the weave by tuning the natural in-plane curvature of the strips. | Session 72: Programmable Matter |
| 1150 | Electrical actuation of DNA-based nanorobotic structures | Simmel, Friedrich | In this talk we will focus on the physical characterization of this nanorobotic system using single molecule fluorescence techniques as well as a discussion of the physical mechanisms underlying the motion of the robotic arm. | Session 73: Remote Control of Macromolecular Devices |
| 1151 | Real-time magnetic actuation of DNA nanodevices | Sooryakumar, Ratnasingham | This talk will report an advancement in this field that opens the door to manipulate molecules and nanomaterials with programmed or user-driven magnetic control in real-time. | Session 73: Remote Control of Macromolecular Devices |
| 1152 | Rapid photoactuation of a DNA nanostructure using an internal photocaged trigger strand | Stephanopoulos, Nicholas | The ability to actuate these devices on-demand would provide a powerful method for creating dynamic nanomachines that can reconfigure nanostructures, apply precisely defined forces, or spatiotemporally control self-assembly. | Session 73: Remote Control of Macromolecular Devices |
| 1153 | Rapid Reconfiguration and Tunable Control of DNA-based Mechanisms | Marras, Alexander; Zhou, Lifeng; Shi, Ze; Arya, Gaurav; Su, Hai-Jun; Castro, Carlos | Here, we present a strategy for tunable actuation in near real time. | Session 73: Remote Control of Macromolecular Devices |
| 1154 | Silk-inspiration: hierarchy, assembly, and mechanics in polyurea-polypeptide hybrids | Korley, LaShanda; Jang, Daseul | Inspired by spider silk, we have designed a series of polymer-peptide polyurethane/ureas to explore the hierarchical arrangement critical to energy absorption and mechanical enhancement. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1155 | Osmotic Swelling Behavior of Ionic Cylindrical Microgels | Alziyadi, Mohammed; Denton, Alan | Within a cell model, we derive an exact statistical mechanical theorem for the electrostatic osmotic pressure of a cylindrical microgel to study the dependence of microion distribution and osmotic pressure on equilibrium size. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1156 | Swelling-induced Morphological Deformation and Constitutive Relation of Soft Materials in Micro-patterned Hydrogel | Bae, Jung Gun; Lee, Won Bo | In this presentation, we propose modified nonlinear stress-strain relationship of our synthesized gels in scope of both continuum and molecular scales and compare it with our experimental results. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1157 | Dynamics of 3D polymer gel with reversible linkers | Biswas, Santidan; Yashin, Victor; Balazs, Anna | We utilize the gel lattice-spring approach to develop the 3D computational model of polymer gels containing the temporary crosslinks. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1158 | Phototunable Viscoelasticity in Hydrogels Through Thioester Exchange | Carberry, Benjamin; Rao, Varsha; Anseth, Kristi | We present a cell culture substrate based on thioester exchange chemistry where viscoelasticity of the biophysical environment can be modulated in situ with light and the photoinitiated thiol-ene ‘click’ reaction. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1159 | Toughening mechanism of tough and self-healing physical hydrogels | CUI, KUNPENG; Gong, Jian Ping | In this work, we used real time small-angle X-ray scattering (SAXS) to study the toughening mechanism of PA hydrogels. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1160 | Anisotropic Hollow Microgels That Can Adapt Their Size, Shape, and Softness | Nickel, Anne; Scotti, Andrea; Houston, Judith; Crassous, Jerome; Pedersen, Jan Skov; Richtering, Walter | With such models, we demonstrated the existence of the cavity and simultaneously the anisotropic character of the microgels. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1161 | Osmotic Pressure of Permeable Ionic Microgels | Denton, Alan; Alziyadi, Mohammed | Within the cell model, we derive the electrostatic contribution within Poisson-Boltzmann (PB) theory, by minimizing a free energy functional with respect to electrostatic potential, and extract the gel pressure from the pressure tensor. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1162 | Tuning Diblock Copolymer Morphologies by Stimuli-Responsive Supramolecular Interactions | Zhang, Xiangyu; Zong, Jing; Meng, Dong | To offer microscopic insights into this process, here we present a simulation study of diblock copolymers blended with homopolymers that are associative to one of the blocks through supramolecular forces. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1163 | On the solvation of elastin-like polypeptides in aqueous mixtures | Zhao, Yani; Singh, Manjesh; Kremer, Kurt; Cortes Huerto, Robinson; Mukherji, Debashish | In this work, we compare conformational behavior of ELPs in aqueous-ethanol and -urea mixtures using explicit solvent generic simulations. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1164 | Chemomechanical origin of directed gel locomotions driven by intenal chemical pulses | Gao, Qingyu; Ren, Lin; Epstein, Irving | Our previous work reported the directed locomotion of self-oscillating polymer gels in asymmetric environments, such as retrograde and direct wave locomotion, reciprocal migration, photophobic and phototropic movement. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1165 | Competition between Hydrophobic and Electrostatic Interactions determine pH-responsive Supramolecular Self-assembly | Chakraborty, Saikat; Berac, Christian; Besenius, Pol; Speck, Thomas | We present results from a molecular dynamics simulations study, inspired by experiments on pH-regulated self-assembly into filaments. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1166 | Detection of Polypeptide Conformational Transitions in Solution via Sound Velocity and Optical Rotation | Blake, Alyssa; Parkinson, Graham; Russo, Paul | Detection of Polypeptide Conformational Transitions in Solution via Sound Velocity and Optical Rotation | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1167 | Giant hyaluronan polymer brushes display polyelectrolyte brush polymer physics behavior | Faubel, Jessica; Patel, Rhiddi; Curtis, Jennifer; Brettmann, Blair | In this study, we explored the stimulus response of the brush to ionic strength and solvent changes. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1168 | Detecting Bacteria with Plasmonic Microcapsules | Dreyfus, Remi; Burel, Céline; Murray, Christopher; Donnio, Bertrand | Here, we show how to combine optically active plasmonic gold nanoparticles and pH-responsive thin shells into “plasmocapsules”. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1169 | Enzyme-Responsive Materials for Regenerative Medicine | Heilshorn, Sarah | Enzyme-Responsive Materials for Regenerative Medicine | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1170 | Shape Control of Charge-patterned Nanocontainers | Brunk, Nicholas; Jadhao, Vikram | Shape Control of Charge-patterned Nanocontainers | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1171 | A simple mechanical model for synthetic catch bonds | Dansuk, Kerim; Keten, Sinan | Here, we have demonstrated that a simple mechanical design based on a tweezer-like mechanism can exhibit catch bond characteristics under thermal excitations. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1172 | Towards Tumor pH Detection Using Plain Radiography: An Injectable pH-Responsive Polyacrylic Acid Based Hydrogel Biosensor | Kiridena, Sachindra; Wijayaratna, Uthpala; Arifuzzaman, Md.; Anker, Jeffrey | Towards Tumor pH Detection Using Plain Radiography: An Injectable pH-Responsive Polyacrylic Acid Based Hydrogel Biosensor | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1173 | Modulation of hydrogel biophysical properties using photoadaptable chemistry improves formation of intestinal organoids | Yavitt, Max; Brown, Tobin; Hushka, Ella; Dempsey, Peter; Anseth, Kristi | We use the adaptable allyl sulfide (AS) photochemistry to tune hydrogel biophysical properties through on demand network reorganization. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1174 | Biosensor physics: DNA folding in a crowded environment | Taylor, Mark; Paul, Wolfgang | We develop a coarse-grained model for ssDNA (based on a flexible hard-sphere chain with square-well patch interactions that accounts for both H-bonding and base-pair stacking) and use it to examine the entropic effects associated with surface crowding. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1175 | Effect of Nanoparticle Surface Functionality on Magnetic and Interfacial Properties of Iron Oxide–Poly(ethylene oxide) Nanocomposites | Weiblen, Donovan; Gionta, Grace; Rende, Deniz; Akcora, Pinar; Ozisik, Rahmi | In the current work, the impact of surface coating of iron oxide (Fe 3O 4) NPs on interfacial heat transfer, bulk magnetization properties, and structure of poly(ethylene oxide), PEO, nanocomposites was explored. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1176 | Ordering hard-sphere particle suspensions by medium crystallization: Effect of size and interaction strength | Gimenez-Pinto, Vianney | Here, I numerically investigate the effect of particle-size and solvent-size in the process of solidification templating by implementing a simple coarse-grain model for the kinetics of hard-sphere particles at the melt/crystal interface. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1177 | Exploring Solution Behavior of Fully Rigid “Block Copolymers” with Sphere-Rod Molecular Architecture | LUO, JIANCHENG; Liu, Tong; Cheng, Stephen; Liu, Tianbo | Here, we explore solution behavior of fully rigid“block copolymers”hybrid macromolecules based on spherical polyoxometalates and rod-like oligofluorenes. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1178 | Stimuli-responsive phase behavior of block copolymers in ionic liquids | Seitzinger, Claire; Hall, Cecilia; Lodge, Timothy | We explore the light-mediated phase behavior of a diblock copolymer, poly(methyl methacrylate)- b-poly(benzyl methacrylate- s-4-phenylazophenyl methacrylate), in a selective ionic liquid solvent, 1-alkyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1179 | Exploring the Limits of Actuation Force Output of Stretch-based Deformation of Liquid Crystalline Elastomers | MCCRACKEN, JOSELLE; Lynch, Kelsey; White, Timothy | We describe several facile approaches for accessing thick LCE actuators (>30x a standard film), including the preparation of devices with interlaid compliant electrodes that allow rapid electrothermal deformation in the multi-laminate LCEs. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1180 | Electro-responsive Ionic Liquid Crystal Elastomers | Feng, Chenrun; Rajapaksha, Chathuranga Prageeth; Kaphle, Vikash; Lussem, Bjorn; Kyu, Thein; Jakli, Antal | We will describe the preparation, physical properties and electric bending actuation of a new class of active materials – ionic liquid crystal elastomers (iLCEs). | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1181 | Voltage-induced deformation in soft dielectric elastomers | Ghosh, Abhishek; Basu, Sumit | We have modelled the behaviour of a soft deformable dielectric body under the combined effect of mechanical loading and electric field through non-linear finite element analysis.These materials are capable of large voltage-induced deformation, but achieving it in practice poses serious challenge due to electromechanical instability and electric breakdown. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1182 | Tough, Responsive and Soft Biomaterials for Tissue Repair and Regeneration | Li, Jianyu | This talk will highlight how to leverage a variety of physical, chemical and mechanical cues to finely tune the interactions between tissues and biomaterials to promote tissue repair and regeneration. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1183 | Flexoionic effect of Ionic Liquid Crystal Elastomers | Rajapaksha, Chathuranga Prageeth; Feng, Chenrun; Piedrahita, Camilo; Albehaijan, Hamad; Kaphle, Vikash; Paudel, Pushpa; Lussem, Bjorn; Kyu, Thein; Jakli, Antal | Here we report the flexoionic effect of iLCEs. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1184 | Statistical field theory model for Liquid Crystal Elastomers | Khandagale, Pratik; Dayal, Kaushik; Majidi, Carmel | We develop a statistical mechanics-based field theoretic model for LCE response to enable us to probe these questions. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1185 | Branching out and back: Reconfigurable nematic drops driven by molecular heterogeneity | Wei, Wei-Shao; Xia, Yu; Ettinger, Sophie; Wang, Yuchen; Yang, Shu; Yodh, Arjun | Here we report reconfigurable nematic liquid crystal oligomer drops, which reveal, surprisingly, that molecular heterogeneity facilitates equilibrium transitions among dramatically different morphological structures, via spatial segregation. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1186 | Imaging crack propagation in tough model gels by ultrasound elastography | Le Blay, Heiva; Deffieux, Thomas; Tanter, Mickael; Marcellan, Alba | This approach offers new insights into soft matter fracture. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1187 | Photoisomerization in a Glassy Matrix: Predicting a Broad Distribution of Dynamics with Machine Learning | Salerno, Kenneth; Sirk, Timothy; De Pablo, Juan | We apply methods from structural analysis of an ideal disordered solid [1] to an all-atom molecular system for the first time, predicting a propensity to isomerize as an analog to “softness.” | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1188 | Response of Polymer Conformations to Crowded Environments | VanDonselaar, Kurt; Kurtti, Matthew; Denton, Alan | To efficiently study conformations of crowded polymers in good solvents, we adopt a coarse-grained model of a polymer as a penetrable ellipsoid whose size and shape fluctuate according to the statistics of a self-avoiding walk [1]. | Session 74: Responsive Polymers, Soft Materials, and Hybrids |
| 1189 | Molecular Simulations of Poly[n]catenane Dynamics and Rheology | Rauscher, Phillip; Schweizer, Kenneth; Rowan, Stuart; De Pablo, Juan | We observe unusual monomer diffusion and present a Rouse-like model that can qualitatively explain the results. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1190 | Graft Polymers and Entanglements: From Linear Chains to Filaments | Dobrynin, Andrey; Liang, Heyi; Grest, Gary | Graft Polymers and Entanglements: From Linear Chains to Filaments | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1191 | Effect of Head-to-Head Association/Dissociation on Relaxation of Entangled Chains | Watanabe, Hiroshi; Matsumiya, Yumi; Kwon, Youngdon | Effect of Head-to-Head Association/Dissociation on Relaxation of Entangled Chains | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1192 | Unified analytic expressions for the entanglement length, tube diameter, and plateau modulus in polymer melts | Hoy, Robert; Kröger, Martin | By postulating that the contributions to the dimensionless plateau modulus from flexible-, semiflexible-, and stiff-chain entanglement mechanisms combine additively (in parallel), and testing this postulate with molecular dynamics simulations and topological analyses of Kremer-Grest bead-spring polymer melts, we obtain analytic expressions that quantitatively predict the plateau modulus G, the entanglement length N e, and the tube diameter a in melts that span three orders of magnitude in l K /p, where l K and p are respectively the Kuhn and packing lengths. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1193 | The Source of Strain Hardening in Glassy Polymers Investigated by Molecular Dynamics and Brownian Dynamics Simulations | Larson, Ronald; Hoy, Robert; Moghadam, Soroush; Zou, Weizhong | Using both fine-grained Molecular Dynamics (MD) simulations and coarse-grained simulations we show how strain hardening in polymeric glasses under uniaxial extension arises from highly stretched strands that form as the polymer chains deform subaffinely on increasing length scales as strain increases. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1194 | Predicting time-temperature-superposition breakdown near the glass transition with the Heterogeneous Rouse Model | Simmons, David | Here, we report on predictions of TTS breakdown by the Heterogeneous Rouse Model, which generalizes the Rouse model to incorporate dynamic heterogeneity – the emergence of a distribution of segmental relaxation times at low temperature. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1195 | Relationship Between Large Amplitude Oscillatory Strain (LAOS) Experiments and Commercial Pressure Sensitive Adhesives Applications Testing | Nakatani, Alan; Zhang, Sipei; Ozair, Sehban; Peera, Asghar; Young, Owen; Manning, Kylie; Pearson, Cachae; Ray, Himal | Historically, analytical test methods on pressure sensitive adhesives (PSA’s) have shown poor correlation to applications test results. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1196 | Polymer rheology predictions from first-principles using the slip-link model | Becerra, Diego; Cordoba, Andres; Katzarova, Maria; Andreev, Marat; Venerus, David; Schieber, Jay | Nonetheless, the work demonstrates that theory predictions without adjustable parameters should be possible. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1197 | A priori Determination of the Extensional Viscosity of Polydisperse Linear Polymer Melts | Dorgan, John; Szfranski, John | The algorithm captures molecular details of extensional flow in three dimensions for entangled polymer melts of arbitrary molecular weight distribution across multiple flow regimes from the correct low deformation limit, through the strain-hardening regime, to the high deformation rate strain softening region. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1198 | Thinning and break up of freestanding polymer solutions | Vermant, Jan; Chatzigiannakis, Emmanouil | We have studied the thinning dynamics of concentrated polymer-solutions liquid films experimentally using a modified thin film balance technique. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1199 | Uniaxial Extensional Rheology of Associating Polymers: from Processing to Performance | Hinton, Zachary; Alvarez, Nicolas | In this work, we use filament stretching uniaxial extension to probe the processing window of strongly associating polymers. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1200 | Liquid to soft solid transition in block polymers via low strength magnetic fields | Suresh, Karthika; Calabrese, Michelle | Here, we identify substantial field-induced rheological and structural changes in several coil-coil BCP variants using magneto-rheology and small-angle neutron scattering (SANS). | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1201 | Multiscale simulation of a well-entangled polymer melt flow in between two coaxial cylinders under non-isothermal condition | Hamada, Yuji; Sato, Takeshi; Taniguchi, Takashi | It is also found that the temperature-dependent reptation-time-based Weissenberg number is a suitable measure to understand how extent polymer chains are deformed in a range of the shear rate used in this study. | Session 75: Rheology and Dynamics of Polymer Liquids and Glasses |
| 1202 | Polyelectrolyte solutions in complex macro- and micro-scale flows | Metaxas, Athena; Panwar, Vishal; Dutcher, Cari | In this study, a cationic polyacrylamide was used to modify the elasticity of the solution, and with varying concentrations of NaCl to alter the ionic strength of the solution. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1203 | Measuring packing length in simulations for different polymer architectures | Bobbili, Sai Vineeth; Milner, Scott | In this work, we measure the packing length, as the typical distance of closest approach of two polymer strands in a simulated bead-spring melt. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1204 | Influence of Sodium Salts on the Swelling and Rheology of Hydrophobically Crosslinked Hydrogels Determined by QCM-D | Vogt, Bryan; Zhang, Mengxue; Douglas, Jack | Here, we investigate model hydrogels with three different sodium salts with anions chosen from the classic Hofmeister series to determine how these counterions influence the swelling and mechanical properties of neutral hydrogels. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1205 | Effects of humidity on the rheology of supramolecular organogels | Vlassopoulos, Dimitris; Vereroudakis, Emmanouil | Specifically, we investigate the properties of biphenyl tricarboxamides (BPTA) in dodecane which exhibit structural transitions with varying temperature. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1206 | Rheology of Jammed Silicone Microgels | Duraivel, Senthilkumar; Angelini, Thomas | In this presentation, we will describe our investigations of polydimethylsiloxane (PDMS) microgels. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1207 | Predicting the plateau modulus from molecular parameters of conjugated polymers | Fenton, Abigail; Colby, Ralph; Gomez, Enrique | Using small angle neutron scattering (SANS), static light scattering (SLS), and oscillatory shear rheology along with the freely rotating chain model we have shown that nine non-crystalline conjugated polymers and three aromatic polymers not only populate a large part of this gap, but that they follow the proposed relationship between b, p, and GN° as well. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1208 | Accessing Viscoelasticity of PDMS at MHz Frequencies: Physically Intuitive Continuum Mechanics Model for QCM Able to Treat Film Resonance Region | Gagnon, Yannic; Burton, Justin; Roth, Connie | We present a physically intuitive continuum mechanics model with no small frequency-shift approximations that can numerically treat film resonance, accessing a wider range of film thicknesses. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1209 | Viscoelastic properties of tightly entangled polymeric systems | Inoue, Tadashi | In this talk, by combining simultenous mesurement of strain-induced birefringence, the mode separation of orientation, bending, and tension is carried out on on the linear viscoelasticity of the model materials, and the contribution of each mode is quantitatively discussed. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1210 | Microphase Separation in Entangled Polymeric Solutions in Extensional Flows | Nafar Sefiddashti, Mohammad Hadi; Edwards, Brian; Khomami, Bamin | To address these questions, we performed a series of NEMD simulations for entangled C 1000H 2002 polyethylene solutions in oligomeric C 16H 32 and benzene solvents. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1211 | Predicting the Microstructure of Bottlebrush Copolymers | Tabedzki, Christian; Riggleman, Robert | In this talk, we present a field-theoretic model for the structure of bottlebrush copolymers. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1212 | Interactions between two knots in a stretched DNA molecule | Klotz, Alexander; Soh, Beatrice; Doyle, Patrick | We use microfluidic devices to stretch viral genomic DNA molecules in an elongational electric field, and observe the molecules using fluorescence microscopy. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1213 | Diffusion of knots in DNA molecules confined in nanochannels | Ma, Zixue; Dorfman, Kevin | We present experimental data on the diffusion of knots in single DNA molecules via a combination of a nanofluidic "knot factory" device and fluorescence microscopy. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1214 | Dynamics of DNA-bridged particle dumbbells in well-entangled, shear-banding polymer solutions under large amplitude oscillatory shear (LAOS) | Shin, Seunghwan; Dorfman, Kevin; Cheng, Xiang | To elucidate the microscopic dynamics of entangled chains in shear-banding flows, we study the dynamics of DNA-bridged particle dumbbells in the shear-banding flow of well-entangled double-stranded DNA (dsDNA) solutions under LAOS using a rheo-confocal shear cell. | Session 76: Rheology and Dynamics of Polymers and Polyelectrolytes |
| 1215 | Hydrodynamic coupling to the electrical response of fluid suspensions of non-Brownian conducting particles | Snell, Matthew; Richards, Jeffrey | We report on the electrical response of conducting non-Brownian suspensions to applied steady shear. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1216 | Rheological analysis of hydrocolloidal Basil seed mucilage in the context of seed physiology | Bhargava, Bhuvsmita; John, Jacob; Varughese, Susy | This work uses Large Amplitude Oscillatory Shear (LAOS) rheology as a tool to estimate the factors that affect crosslinking in the Basil seed mucilage. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1217 | Rheology of glassy and jammed emulsions | Cao, Cong; liao, jianshan; breedveld, victor; Weeks, Eric | We study the rheology of monodisperse and polydisperse emulsions with various mean droplet sizes. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1218 | Athermal Shear-Driven Flow of Mixtures of Frictionless Rods and Disks in Two Dimensions | Teitel, Stephen; Marschall, Theodore | We study behavior as the total packing fraction and the fraction of rods are varied, at slow shear strain rates. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1219 | Brownian motion in near-surface pressure driven flows with 3D-nanometric spatial resolution | Vilquin, Alexandre; Soulard, Pierre; Bertin, Vincent; Guyard, Gabriel; Lacoste, David; Raphael, Elie; Restagno, Frederic; Salez, Thomas; McGraw, Joshua | Here we present a detailed look at the statistics of near-surface particle motions in pressure-driven water for which diffusion is important compared to advection. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1220 | Effect of Roughness and Elasticity on Interactions between Charged Colloidal Spheres | Monti, Joseph; McGuiggan, Patricia; Robbins, Mark | Effect of Roughness and Elasticity on Interactions between Charged Colloidal Spheres | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1221 | Near-surface dynamics of semidilute polymer solutions: diffusion, nonlinear rheology, and the hydrodynamic boundary condition | Guyard, Gabriel; McGraw, Joshua; Vilquin, Alexandre; Restagno, Frederic | Here we report nanoscale-resolved particle motions in microfluidic channels for pressure-driven flows of semidilute polymer solutions. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1222 | Emergence of surface roughness from plastic deformation of amorphous materials | Leute, Richard; Junge, Till; Pastewka, Lars | We present avalanche statistics and analyse the spatiotemporal distribution of the plastic events. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1223 | Determining the Structural Characteristics of Deforming Objects from Their Scattering Signature | HUANG, GUAN-RONG; Wang, Yangyang; Shinohara, Yuya; Do, Changwoo; Egami, Takeshi; Chen, Wei-Ren | We present a general approach to deal with this problem. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1224 | Maximum strain energy density drives path selection in dynamic cracks | Rozen-Levy, Lital; Kolinski, John; Cohen, Gil; Fineberg, Jay | Maximum strain energy density drives path selection in dynamic cracks | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1225 | A scaling law to determine cracking lengths in shrinkable granular packings | Cho, Han-Jae; Datta, Sujit | We perform experiments with shrinkable hydrogel particles and discrete-element simulations. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1226 | The Prince’s Dilemma: How Local Heterogeneities Affect the Onset of Frictional Slip | Agajanian, Mary; Dillavou, Sam; Stin, Vincent; Sagy, Amir; Brodsky, Emily; Rubinstein, Shmuel | We systematically introduce localized pockets of stress (peas) to the interface geometry and characterize the effects of these peas on the dynamics of slip nucleation and growth. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1227 | Role of Mesoscopic Friction and Morphology in Large Deformation of Carbon Nanotube Network: a Distinct Element Method Study | Wang, Yuezhou; Drozdov, Grigorii; Dumitrica, Traian | We address this challenge by developing a new simulation methodology titled the mesoscopic Distinct Element Method (mDEM). | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1228 | Tracking Tabletop Earthquake Nucleation | Dillavou, Sam; Stin, Vincent; Agajanian, Mary; Sagy, Amir; Brodsky, Emily; Rubinstein, Shmuel | We find that nucleation location and style is controlled by the stress concentrations. | Session 77: Rheology, Flow, Deformation, Fracture and Friction of Soft Matter |
| 1229 | How do cells control the length of their flagella? | Kar, Prathitha; Fai, Thomas; Mohapatra, Lishibanya; Kondev, Jane; Amir, Ariel | Here, we show that within a wide class of models, length-control of multiple flagella can only occur if the disassembly (depolymerization) of the flagella is length-dependent. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1230 | Size regulation of multiple intracellular structures self-assembled from a shared resource pool | Banerjee, Deb; Banerjee, Shiladitya | Here we present a physical theory for non-equilibrium self-assembly and size regulation of sub-cellular structures, based on negative feedback between structure size and growth rate. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1231 | Energy cost of protein gradient formation in cells | Datta, Arnab | In this talk I examine different mechanisms of gradient formation in cells and estimate the energy costs associated with them. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1232 | First passage times in multi-protein self-assembly | MISHRA, BHAVYA; Johnson, Margaret | We formulate the self-assembly of protein binding pairs as first-passage problems and calculate the mean time to approach the thermodynamic equilibrium. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1233 | Quantifying kinetics of multi-protein self-assembly, remodeling, and disassembly | FU, YIBEN; Johnson, Margaret | We show here using reaction-diffusion simulations how the kinetics of these assembly and disassembly processes can be sensitively tuned by the binding kinetics and cooperative interactions of the coat components and the molecules linking them to the membrane. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1234 | Theoretical principles of viral shell assembly and self-organization | Zandi, Roya | We find that the ground states consist of positive disclination defects and that the ground states with icosahedral subgroup symmetries in caps arise across a range of curvatures, even far from the closure point of complete shells. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1235 | Computational modeling to explain Hepatitis-B Virus capsid assembly, dimorphism, and disruption by antiviral drugs | Mohajerani, Farzaneh; Tyukodi, Botond; Schlicksup, Christopher; Hadden, Jodi; Zlotnick, Adam; Hagan, Michael | In this talk we will describe dynamical computer simulations of HBV assembly, using a model which is minimal and highly computationally tractable, but has parameters learned from atomistic simulation data of whole HBV capsids. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1236 | Thermodynamic and kinetic aspects of polymorphism in core controlled assembly of virus-like particles | Ramezani, Alireza; Karachalios, Orfeas Agis; Van der Schoot, Paul; Zandi, Roya | Our goal is to understand how protein concentration, stoichiometry and preferred curvature of capsids influence the prevalence of one shell size over another one. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1237 | RNA-mediated capsid nucleation of bacteriophage MS2 coat proteins confers RNA packaging selectivity | Chiang, Timothy; Garmann, Rees; Goldfain, Aaron; Williams, LaNell; Manoharan, Vinothan | Using interferometric scattering microscopy and quantitative gel electrophoresis, we show that the RNA-mediated nucleation-and-growth assembly pathway of MS2 coat proteins can drive preferential encapsidation of cognate RNA, and hence selective packaging. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1238 | Role of C-Terminal "Arms" in the Assembly and Stability of SV40 Polymorphs | Waltmann, Curt; Olvera De La Cruz, Monica; Asor, Roi; Raviv, Uri | We study SV40 polymorphs by simulating the templated assembly process of VP1 pentamers. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1239 | Linking Capsomere Elasticity with Virus Capsid Size and Patterning | Nilsson, Lauren; Kadupitiya, JCS; Jadhao, Vikram | We introduce SOUFFLE, a molecular dynamics simulation method with elastic capsomeres, to investigate capsid assembly. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1240 | Bulk light-scattering measurements of viral capsid self-assembly around RNA. | Williams, LaNell; Chiang, Timothy; Garmann, Rees; Manoharan, Vinothan | To better understand this process, we modify the interactions between coat proteins and between the coat proteins and RNA of MS2 bacteriophage in vitro by varying the ionic strength and pH, and we study the assembly using dynamic and static light scattering. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1241 | Membrane tubulation induced by chiral crescent-shaped proteins | Noguchi, Hiroshi | We studied the protein assembly and membrane remodeling using coarse-grained meshless membrane simulations. | Session 78: Self-Limiting Assemblies: Functional Structures in Biology |
| 1242 | Finite-Size Colloidal Constructs Designed through Self-Assembly of Defective Colloidal Molecules | Parvez, Nishan; Zanjani, Mehdi | In this study, we use computational techniques to identify, investigate, and exploit self-assembly paradigms that are made possible through the use of defective colloidal molecules. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1243 | Self-assembly of protein-made structures | Curatolo, Agnese; Goodrich, Carl; Kimchi, Ofer; Brenner, Michael; Hsia, Yang; Chen, Zibo; Boyken, Scott; Baker, David | Here I will present different approaches that one can take to predict the yield of protein-made structures and address the difficulties of relating statistical mechanics models and real world experiments. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1244 | Programmable self-assembly of DNA origami capsids based on the principles of virus structure. | Fraden, Seth | We provide a general and modular solution for building synthetic icosahedral shells on the scale of 100 nm, motivated by the 1962 Caspar and Klug theory of virus structure. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1245 | Functionalized DNA origami shells for cargo encapsulation | Aghvami, S.Ali; SIgl, Chris; Willner, Elena; Dietz, Hendrik; Fraden, Seth | We demonstrate a robust method for self-assembly of virus like DNA origami capsids of various sizes by designing specific capsomers with programmable shape complementary lock and key interactions. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1246 | Structural and mechanical properties of nucleic acid nanotubes: A combined all-atom and coarse-grained molecular dynamics study | Naskar, Supriyo; Joshi, Himanshu; Gosika, Mounika; Chakraborty, Banani; Seeman, Nadrian; Maiti, Prabal | In this work, we introduce a computational framework to model nucleic acid nanotubes and estimate their mechanical properties using various levels of theory. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1247 | Self-assembly of DNA origami particles into self-limited surfaces | Hayakawa, Daichi; Hall, Douglas; SIgl, Chris; Grason, Gregory; Rogers, William | In this talk, I will present experimental results showing that we can mimic these features using DNA origami. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1248 | Frustration in the absence of Gaussian Curvature: what we learned from colloidal crystallization on a cylinder | Tanjeem, Nabila; Wilkin, William; Rycroft, Christopher; Manoharan, Vinothan | We demonstrate the effects of a closure constraint on a crystal in the absence of Gaussian curvature. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1249 | Self-Assembly of Triply-Periodic Minimal Surfaces, An “Inverted” Caspar-Klug Approach | Duque, Carlos; Hall, Douglas; Tyukodi, Botond; Hagan, Michael; Grason, Gregory; Santangelo, Christian | In this work, we are interested in studying an “inverted” Caspar-Klug problem, focussed primarily on structures with negative Gaussian curvature. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1250 | Colloidal crystallization on a cone | Sun, Jessica; Tanjeem, Nabila; Manoharan, Vinothan | We study the self-assembly of colloidal spheres on the surface of a cone, which has zero Gaussian curvature but varying mean curvature. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1251 | Programming extrinsic geometry to control membrane self-assembly | Hall, Douglas; Stevens, Mark; Grason, Gregory | In this talk, we show how an additional molecular shape parameter separately controls the extrinsic geometry (i.e. the directionality of curvature axis relative to inter-block packing directions), modulates the intrinsic frustration energetics and influences the size scale over which frustration stress accumulate in the assembly. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1252 | Dynamical and equilibrium calculations of self-limited assembly through geometric frustration | Tyukodi, Botond; Mohajerani, Farzaneh; Grason, Gregory; Hagan, Michael | In this talk, we use a recently developed dynamical MC algorithm and free energy calculations to study the assembly of subunits that undergo frustrated assembly. | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1253 | Emergence of fiber in frustrated self assembly | Le Roy, Hugo; Lenz, Martin; Terzi, Mert | In this work, we use statistical physics tools to investigate the thermodynamic stability of such fibers in more realistic conditions | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1254 | Role of Geometrical Frustration in Self-limiting Enantioselective Synthesis of Chiroptical Helices | kumar, prashant; Yan, Jiao; Simon, Alexander; Katz, Daniel; Hall, Douglas; Grason, Gregory; Kotov, Nicholas | Herein, we present a colloidal synthesis route for enantiopure bow-ties by guiding the electrostatic and coordination interactions between cadmium ions and chiral amino acid cysteine (Cys). | Session 79: Self-Limiting Assemblies: Programmable Assemblies |
| 1255 | Pitch-balanced helical motifs in tightly packed lamellar structures | Efrati, Efi | In this talk, I will show that the lamellar structures that house photosynthesis in some plants, the thylakoid, also display right and left-handed motifs. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1256 | Colloidal membrane thickness sets critical surface area for vesicle formation | Robaszewski, Joanna; Jia, Leroy; Powers, Thomas; Pelcovits, Robert; Dogic, Zvonimir | We use colloidal membranes as experimental models to study the forces governing vesicle formation. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1257 | How Curvature and Tension Direct Morphology and Interactions of Solid Membrane Domains in Fluid Vesicles | Santore, Maria; Xin, Weiyue; Wan, Hao | The curvature imposed we show that at sufficiently high tensions, the curvature imposed by global vesicle shape influences the growth of solid domains, producing deviations from hexagon domain shape to include edge instabilities that appear as flowers. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1258 | Collapse and folding of flexible colloidal polymers | McMullen, Angus; Brujic, Jasna | Unlike periodically repeating structures, here we introduce a new paradigm of self-assembly in which flexible colloidal polymers find a ‘fold’, similar to the way polypeptides fold into proteins. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1259 | Dissolving a DNA liquid through competition | Abraham, Gabrielle; Saleh, Omar | Here, we employ a model DNA liquid system and quantify the dissolution by short nucleic acids. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1260 | Theory and simulation of reaction diffusion models of self-limiting droplet formation | GrandPre, Trevor; Limmer, David | We discuss ways in which macroscopic domains can be avoided by slow coarsening dynamics accompanying gelation or active processes that modulate Ostwald ripening. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1261 | Nonequilibrium Variational Control Forces for Self-Limited Colloidal Assembly | Das, Avishek; Limmer, David | We discuss a variational principle for the optimization of interparticle and nonequilibrium driving forces, which lead to robust assembly of self-limited clusters. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1262 | Kinetic entrapment: a mechanism for periodic one-dimensional growth | Witten, Thomas; Lenz, Martin | Here we propose a common kinetic mechanism in which the next growth site is a generic, deterministic function of the current aggregate configuration. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1263 | Pattern recognition through molecular self-assembly | Evans, Constantine; O’Brien, Jackson; Winfree, Erik; Murugan, Arvind | We test the system with numerous concentration patterns and confirmed nucleation-based pattern recognition through Atomic Force Microscopy (AFM) and fluorescence measurements. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1264 | Strain-Adaptive Self-Assembled Networks of Linear-Bottlebrush-Linear Copolymers | Liang, Heyi; Wang, Zilu; Dobrynin, Andrey | We study the strain-adaptive behavior of the self-assembled networks of linear-bottlebrush-linear ( LBL) triblock copolymers using a combination of analytical calculations and molecular dynamics simulations. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1265 | Self-directed Self-assembly of Block Copolymers | Huang, Hejin; Alexander-Katz, Alfredo | Here, we introduce a novel method, which enables self-directed self-assembly of 3D tailored nanostructures. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1266 | Identification of a Frank–Kasper Z phase from shape amphiphile self-assembly | Cheng, Stephen; Huang, Mingjun; Su, Zebin | Identification of a Frank–Kasper Z phase from shape amphiphile self-assembly | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1267 | Theory of Complex Spherical Packing Phases in Surfactant Systems | Xie, Jiayu; Lai, Chi To; Shi, Anchang | Theoretically, we model the surfactant molecules by short diblock copolymers composed of a hydrophilic head and a hydrophobic tail. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1268 | Predictive Modeling of Dendrimer Directed Nanoparticle Self-Assembly | Vo, Thi; Elbert, Katherine; Krook, Nadia; Zygmunt, William; Park, Jungmi; Yager, Kevin; Composto, Russell; Glotzer, Sharon; Murray, Christopher | Here, we present a combined experimental and theoretical study in which a series of dendrimer ligands are used to direct the assembly of nanoplates into 2D and 3D geometries. | Session 80: Self-Limiting Assemblies: Soft Assemblies and In and Out of Equilibrium |
| 1269 | Conformal elasticity of two-dimensional dilational maximally auxetic materials | Rocklin, Zeb | Despite finite-size effects, bending resistance and disorder, this theory accurately captures response in both finite-element simulations and experimental systems, opening new avenues for shape-changing, programmability and nonlinear response. | Session 81: Soft Mechanics via Geometry |
| 1270 | Control and design of response in disordered networks: Geometry and self-stresses. | Bose, Anwesha; van Duijnhoven, Steven; Vermeulen, Mathijs; Ellenbroek, Wouter; Storm, Cornelis | I share two recent examples where we use geometry to elicit nonstandard mechanical response from disordered networks. | Session 81: Soft Mechanics via Geometry |
| 1271 | Coulomb Floppy Networks: from soft to hard matter. | Tkachenko, Alexei; Zaliznyak, Igor | We demonstrate how the very same concept emerges in the context of a family of open-framework ionic solids, e.g. ScF 3, which can be conceptualized as Coulomb FNs. | Session 81: Soft Mechanics via Geometry |
| 1272 | Emergence of rigidity, microscopic rearrangements and viscoelastic response in soft particle gels | Del Gado, Emanuela; Keshavarz, Bavand; Bantawa, Minaspi; Geri, Michela; Bouzid, Mehdi; Divoux, Thibaut; McKinley, Gareth | We have investigated the connection between the structural and mechanical heterogeneities of soft particulate gels and their viscoelastic spectrum in a 3-D microscopic numerical model, using large scale simulations with Optimally Windowed Chirp (OWCh) signals. | Session 81: Soft Mechanics via Geometry |
| 1273 | Pseudomomentum balance in thin structures | Hanna, James; Singh, Harmeet | We will employ it in the context of thin, flexible structures, to explain conserved quantities in rotating conical membranes and propulsive forces on confined elastic rods. | Session 81: Soft Mechanics via Geometry |
| 1274 | Asymptotic isometry and wrinkle-to-fold transition in a simplified Lamé problem | Pal, Anshuman; Witten, Thomas | In our work, we study an even simpler version of this problem, using theory and simulations, where the annulus is subjected to only a radial pull at the inner boundary. | Session 81: Soft Mechanics via Geometry |
| 1275 | Geometry, mechanics, and dynamics of leaves, flowers, and sea slugs | Yamamoto, Kenneth; Venkataramani, Shankar | I will describe novel ideas stemming from characterizing and analyzing these defects using discrete differential geometry in order to uncover fundamental insights into the elastic behavior and properties of thin hyperbolic bodies. | Session 81: Soft Mechanics via Geometry |
| 1276 | Mechanics and geometry of soft beams and shells | Battista, Daniele; Curatolo, Michele; Nardinocchi, Paola | We investigate swelling-induced morphing in thin soft polymer based plates and shells. | Session 81: Soft Mechanics via Geometry |
| 1277 | Capture of particles by a flexible granular envelope | Bancroft, Katharine; Brzinski, Theodore | The capture of small particles by a flexible envelope can model many common phenomena. | Session 81: Soft Mechanics via Geometry |
| 1278 | Predicting the onset of disclination defects on curved open surfaces | Agarwal, Siddhansh; Hilgenfeldt, Sascha | Starting from stringent energy minimization, we instead propose a weighted integral Gaussian curvature as an improved predictor for the transition – one that is universally valid for a large class of bounded rotationally symmetric surfaces. | Session 81: Soft Mechanics via Geometry |
| 1279 | Facets and Folds: A model for fragmentation kinetics of crumpled thin sheets | Andrejevic, Jovana; Lee, Lisa; Rubinstein, Shmuel; Rycroft, Christopher | We identify a physical model for the evolution of facet area distribution in crumpled sheets that captures a wide range of data samples with a single variable parameter. | Session 81: Soft Mechanics via Geometry |
| 1280 | Stress Relaxation of Drying Colloids | Jiang, Zhiyu; Shen, Chong; Li, Lanfang; Valentine, Megan; Xu, Ye; Ou-Yang, H Daniel | Using drying colloidal suspensions as a model system, this study examines how stresses in the colloidal matrix relax when particles are compacted during uniaxial drying in a microfluidics. | Session 81: Soft Mechanics via Geometry |
| 1281 | Physics Behind the Snapping of a Twisted Balloon | Cheng, Yu-Chuan; Fan Chiang, Hung-Chieh; Li, Hsin-Huei; Li, Wei-Chih; Hong, Tzay-Ming | In this talk we investigate the process that leads up to the snap of a cylindrical balloon. | Session 81: Soft Mechanics via Geometry |
| 1282 | The topography of tuning | Katifori, Eleni | Inspired by such a system, we explore how mechanical systems achieve a specified complex function such as strain propagation in mechanical networks. | Session 81: Soft Mechanics via Geometry |
| 1283 | Mechanics of soft fibrous mats with inter-fiber adhesion and friction | Picu, Catalin; Negi, Vineet | We determine the scaling of material properties with the intensity of adhesion, and describe the interplay between frictional interactions and geometry in defining the mechanics of the mat. | Session 81: Soft Mechanics via Geometry |
| 1284 | Nonlinear Poisson effect in critical mechanical networks | Shivers, Jordan; Arzash, Sadjad; MacKintosh, Fred | We measure this effect using a variety of 2D and 3D model network structures and propose a phase diagram governing the transition as a function of connectivity and strain. | Session 81: Soft Mechanics via Geometry |
| 1285 | Shear modulus discontinuity in fiber networks | Arzash, Sadjad; Shivers, Jordan; MacKintosh, Fred | By simulating various network models, we confirm that although the network’s stiffness exhibits a discontinuity, the transition is critical in nature. | Session 81: Soft Mechanics via Geometry |
| 1286 | Shaping curved surfaces using origami. | Jules, Théo; Lechenault, Frederic; Adda-Bedia, Mokhtar | We craft these patterns and scan them using a structured-light 3D-scanner. | Session 81: Soft Mechanics via Geometry |
| 1287 | Non-Hookean Elastic Moduli of 2D Tissue Model | Hernandez, Arthur; Moshe, Michael; Marchetti, M Cristina; Bowick, Mark | We study the peculiar mechanical response of a discrete vertex model (VM) of 2D epithelia. | Session 81: Soft Mechanics via Geometry |
| 1288 | Geometry and kinetics determine the packing structure on evolving surfaces | Xie, Zhaoyu; Burke, Christopher; Mbanga, Badel; Spicer, Patrick; Atherton, Tim | Other surfaces and particles are explored and we propose a new class "metric jamming" to describe the transition to rigidity under shape deformation. | Session 81: Soft Mechanics via Geometry |
| 1289 | Crumple-Origami Transition for Twisting Cylindrical Shells | Wang, Li-Min; Tsai, Sun-Ting; Lee, Chih-yu; Hsiao, Pai-Yi; Deng, Jia-Wei; Fan Chiang, Hung-Chieh; Fei, Yicheng; Hong, Tzay-Ming | By studying the regularity of crease pattern, acoustic emission and energetics from experiments and simulations, we develop a model to explain this transition from frustration of geometry that causes breaking of rotational symmetry. | Session 81: Soft Mechanics via Geometry |
| 1290 | Statistical mechanics of nanotubes | Sarkar, Siddhartha; Kosmrlj, Andrej | We investigate how thermal fluctuations affect mechanical properties of nanotubes by employing renormalization group procedure. | Session 81: Soft Mechanics via Geometry |
| 1291 | Braided biopolymer filament bundles produce topologically protected kinks | Slepukhin, Valentin; Grill, Maximilian; Hu, Qingda; Botvinick, Elliot; Wall, Wolfgang; Levine, Alex | We find analytically three possible mechanisms of kink stabilization: the different trapped length of the filaments between two cross-links; the endpoint of the filament in the middle of the bundle; the braiding of the filaments in the bundle. | Session 81: Soft Mechanics via Geometry |
| 1292 | Fabrication of supported lipid bilayers of designed shape with micro-printing and replica-molding | Rinaldin, Melissa; Giomi, Luca; Kraft, Daniela | Here, we present a general and facile method to obtain membranes of designed curvature with high precision. | Session 81: Soft Mechanics via Geometry |
| 1293 | Curvature-driven propulsion of floating films: Part 1 | Ripp, Monica; Schrecengost, Zachariah; Lawson-Keister, Elizabeth; Paulsen, Joseph | We develop this model and its consequences in the next talk. | Session 81: Soft Mechanics via Geometry |
| 1294 | Curvature-driven propulsion of floating films: Part 2 | Schrecengost, Zachariah; Ripp, Monica; Barrett, Jordan; Démery, Vincent; Paulsen, Joseph | Implementing this model is a nontrivial optimization problem, due to the wide variety of configurations available to the sheet and interface. | Session 81: Soft Mechanics via Geometry |
| 1295 | Geometrically-frustrated wrinkle patterns 1: Defects and mesoscale structure | Paulsen, Joseph; Tovkach, Oleh; Ripp, Monica; Chen, Junbo; Zhang, Teng; Davidovitch, Benjamin | Using experiments and simulations, we demonstrate two distinct solutions: (i) states with approximately constant wavelength, enabled by “defects” in the wrinkle pattern where new wrinkles begin, and (ii) “defect-free” states consisting of a fixed number of wrinkles of non-constant wavelength. | Session 81: Soft Mechanics via Geometry |
| 1296 | Geometrically-frustrated wrinkle patterns 2: cascades versus defects | Xin, Meng; O’Kiely, Doireann; Davidovitch, Benjamin; Vella, Dominic | Soft Matter 15 1405 (2019)), we employ numerical simulations to study the wrinkle patterns in a uniaxially-compressed sheet, floating on a liquid bath whose density in non-uniform, implying a gra- dient in the locally-favored value of the wrinkle wavelength in the direction orthogonal to the axis of compression. | Session 81: Soft Mechanics via Geometry |
| 1297 | Geometrically-frustrated wrinkle patterns 3: Experimental realisation of defect patterns | Domino, Lucie; O’Kiely, Doireann; Vella, Dominic | Here, we present a series of experimental systems that exhibit different mechanisms for introducing new wrinkles, including smooth cascades and localised defects. | Session 81: Soft Mechanics via Geometry |
| 1298 | Curvature in Compressed Thin Cylindrical Shells Approaching the Isometric Limit | Voce, Nicole; Anderson, Cassidy; Dias, Marcelo; Feitosa, Klebert | Our goal is to characterize the relationship between the shell thickness and the localization of stresses by using curvature measurements. | Session 81: Soft Mechanics via Geometry |
| 1299 | Topological Floppy Modes in Epithelial Tissue Network | Liu, Harold; Zhou, Di; Zhang, Leyou; Lubensky, David; Mao, Xiaoming | In this talk, we explore topological mechanics in a simple epithelial cell sheet starting described by a vertex model. | Session 81: Soft Mechanics via Geometry |
| 1300 | Twisting, buckling, and tension in elastic helices with multiple perversions | Fortais, Adam; Dalnoki-Veress, Kari | Here we observe that, surprisingly, multiple perversions still form, despite the uniform cylindrical cross-section of our fibers. | Session 81: Soft Mechanics via Geometry |
| 1301 | Simulations of buckling and crumpling in twisted ribbons | Leembruggen, Madelyn; Andrejevic, Jovana; Kudrolli, Arshad; Rycroft, Christopher | Here, we develop a computational model of this complex, dynamic process, which reproduces the transitions seen in experimental tests. | Session 81: Soft Mechanics via Geometry |
| 1302 | Statistical mechanics of 2D sheets under uniaxial tension | Bahri, Mohamed El Hedi; Kosmrlj, Andrej | Motivated by this, we investigate how isotropic sheets respond to uniaxial tension by employing the renormalization group. | Session 81: Soft Mechanics via Geometry |
| 1303 | Isigami: sheet reconfiguration driven by cone interactions | Katz, Benjamin; Crespi, Vincent | Exploring these surfaces with an example constructed out of a graphene monolayer with the defects arranged in a kagome-like superlattice, we model its mechanical response with semiclassical molecular dynamics. | Session 81: Soft Mechanics via Geometry |
| 1304 | Indentation of ellipsoidal and cylindrical shells: new insights from shallow-shell theory | Sun, Wenqian; Paulose, Jayson | We study the effects of geometry and pressure-induced stress on the indentation stiffness of ellipsoidal and cylindrical elastic shells using shallow shell theory. | Session 81: Soft Mechanics via Geometry |
| 1305 | Statistical mechanics of dislocation pileups | Zhang, Grace; Nelson, David | We use random matrix theory to probe the equilibrium statistical mechanics, which allows us to extract the spatial correlation functions and structure factors of two distinct types of dislocation pileups, those in uniform stress fields and those in stress fields linear in space. | Session 81: Soft Mechanics via Geometry |
| 1306 | Statistical ensemble inequivalence for flexible polymers under confinement in various geometries | Benetatos, Panayotis; Dutta, Sandipan | In this talk, we extend that work to the conformational response to confining forces distributed over surfaces. | Session 81: Soft Mechanics via Geometry |
| 1307 | Soft actively contractile cylinders and spheres | Curatolo, Michele; Nardinocchi, Paola; Teresi, Luciano | We view active contraction as a change in the material metric of the structures, and describe it within a theory of stress-diffusion with remodeling of the polymeric network. | Session 81: Soft Mechanics via Geometry |
| 1308 | Non trivial deformation structures in confined elastic membrane under stretching | Das, Debankur; Horbach, Jürgen; Sengupta, Surajit; Saha-Dasgupta, Tanusri | To understand these structures and their interrelation, we introduce an external field that couples to local non-affine fluctuations measured from the flat reference. | Session 81: Soft Mechanics via Geometry |
| 1309 | Mechanical response of wrinkled structures | Tong, Sijie; Kosmrlj, Andrej | In analogy with the critical phenomena in ferromagnets, we can introduce the critical exponents for the response of the characteristic mode of wrinkles, which are consistent with the Landau theory. | Session 81: Soft Mechanics via Geometry |
| 1310 | Physical Limits of Marangoni-driven Patterning | Stanley, Steven; Bonnecaze, Roger | Here, we present a model for Marangoni-driven patterning and perform a nonlinear analysis to determine the physical limits of pattern aspect ratio and feature pitch for an equal line-space system. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1311 | Hydrodynamic and Surface-Wetting Effects on Phase Separation Dynamics in Thin-Film Melts | Goyal, Abheeti; Van der Schoot, Paul; Toschi, Federico | Typically, the dynamics of fluid-fluid demixing is modeled using relaxational phase field-type theories that ignore the role of hydrodynamics. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1312 | Molecular Dynamics Simulations of Creep in Silica-Water Systems | Johansson, Anders; Sveinsson, Henrik; Thøgersen, Kjetil; Hafreager, Anders; Aharonov, Einat; Malthe-Sørenssen, Anders | In this work, we demonstrate that molecular dynamics simulations provide new insights on creep in water-wetted silicates. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1313 | Nonlinear Interface Equation For Capillary Driven Flow in 3D Open Curved Trajectories | White, Nicholas; Troian, Sandra | Here we present an extension of this classic work to flow in 3D open and curved channels in which the trajectory radius of curvature is larger than the film thickness. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1314 | Theory of the two-dimensional paraelectric structural transformation of ferroelectric group-IV monochalcogenide monolayers | Barraza-Lopez, Salvador; Villanova, John; Kumar, Pradeep | In this presentation, we disclose a quadratic dispersion of softening modes and analyze molecular dynamics data to understand the atomistic motions underlying the ferroelectric to paraelectric transformation in these atomically thin membranes. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1315 | Evolution of elastic moduli through a two-dimensional structural transformation | Pacheco-Sanjuan, Alejandro; Bishop, Tyler; Farmer, Erin; Kumar, Pradeep; Barraza-Lopez, Salvador | As additional support for the existence of a quantum paraelastic phase, we use a qualitative WKB analysis [2] to estimate escape times from an energy well on the landscape. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1316 | Laser-induced strong Marangoni effect in deformation and manipulation of ferrofluid | Lin, Feng; Vishal, Talari; Zhao, Junyi; Schaibley, John; Liu, Dong; Wang, Zhiming; Bao, Jiming | We demonstrate the laser-induced deformation of ferrofluid surfaces with ultra-violet to infra-red lasers. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1317 | Long-time evolution of interfacial structure in dewetting | He, Mengfei; Nagel, Sidney | To quantify the absolute thickness of these steady-state structures precisely, I have developed an interferometric technique taking advantage of a varying angle of incidence. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1318 | Flows at Molecular Scales: Probing and Manipulating Ultra-Thin Supported Liquid Films | Clavaud, Cecile; Talini, Laurence; Frétigny, Christian | We have developed a fully non invasive optical technique [Phys. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1319 | Towards nanoscale confinement in TEM liquid cells | Sendgikoski, Kyle; Kanwal, Alokik; Liddle, James; Cumings, John | We report on improvements made to a monolithic, in-situ TEM liquid cell 1 with sub 40nm liquid thickness that overcomes the common challenges encountered with two-piece TEM liquid cells. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1320 | Chemical Vapor Deposition Growth of Nickel Sulfide for optoelectronic device applications | ., Nidhi; Nautiyal, Tashi; Das, Samaresh | Several spectroscopic studies reveal the high-quality crystalline nature of CVD grown NiS 2 film. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1321 | Colloidal migration in microchannels under combined potential and pressure gradients | Prakash, Shaurya; Lochab, Varun | Here, we discuss the effect of manipulating particle properties and fluid inertia over broad parametric ranges to elucidate robustness of particle migration to and away from walls, and the formation of particle bands. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1322 | Lattice Boltzmann Method for Designing cellular solids for effective acoustic noise cancellation | Zope, Rajat; Dayal, Pratyush | Here, we design sound-absorbing materials and establish that by tailoring their morphological features, we can achieve acoustic noise cancellation, effectively. | Session 82: Thin Films, Surface Flows, and Interfaces |
| 1323 | Predicting failure in disordered solids from structural metrics | Richard, David; ozawa, Misaki; Patinet, Sylvain; Stanifer, Ethan; Shang, Baoshuang; Ridout, Sean; Xu, Bin; Zhang, Ge; Morse, Peter; BARRAT, Jean-Louis; Berthier, Ludovic; Bouchbinder, Eran; Falk, Michael; Guan, Pengfei; Liu, Andrea; Martens, Kirsten; Sastry, Srikanth; Vandembroucq, Damien; Lerner, Edan; Manning, M. Lisa | Here we use a swap Monte Carlo algorithm to prepare equilibrium amorphous configurations with very different stabilities that exhibit a range of behaviors under shear, from ductile flow to brittle failure. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1324 | Yielding of Ultrastable Computer Glasses | Ozawa, Misaki; Berthier, Ludovic; Biroli, Giulio; Rosso, Alberto; Tarjus, Gilles; Singh, Murari; Yeh, Wei-Ting; Miyazaki, Kunimasa; Kawasaki, Takeshi | We study mechanical yielding of ultrastable computer glasses generated by optimized swap Monte-Carlo simulations for polydisperse particles [1,2] as well as more realistic multi-component metallic glass models [3]. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1325 | When does local structure play a role in sheared jammed packings? | Ridout, Sean; Rocks, Jason; Liu, Andrea | We apply the softness analysis to plastic events in jammed packings across many dimensions and pressures, and find that local structure is perhaps more predictive than one might have guessed. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1326 | Connecting thermal relaxation to local yield stress in glassy systems | Lerbinger, Matthias; Barbot, Armand; Patinet, Sylvain; Vandembroucq, Damien | We study a binary Lennard-Jones mixture in the supercooled regime using molecular dynamic simulations. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1327 | Correlation between local structural order and ductility of glasses | Nawano, Aya; Hu, Yuan-Chao; Schroers, Jan; Shattuck, Mark; O’Hern, Corey | In this work, we identify atomic-scale structural signatures in undeformed metallic glasses that are able to predict their mechanical response to tension or pure shear tests. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1328 | Understanding shear bands characteristics and formation in model glasses through the measure of the local yield stress. | Barbot, Armand; Lerbinger, Matthias; Lemaître, Anaël; Vandembroucq, Damien; Patinet, Sylvain | This method is nonperturbative and gives access to a quantitative property on a well-controlled length scale. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1329 | Atomic nonaffinity as structural indicator of protocol-dependent plasticity in amorphous solids | Xu, Bin; Falk, Michael; Patinet, Sylvain; Guan, Pengfei | Here we report the atomic nonaffinity, as a structural indicator with intrinsic orientation, which is derived from the total nonaffine modulus based on a perturbation analysis of the potential energy landscape. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1330 | Unveiling the predictive power of static structure in glassy systems | Bapst, Victor; Keck, Thomas; Grabska-Barwinska, Agnieszka; Donner, Craig; Cubuk, Ekin Dogus; Schoenholz, Sam; Obika, Annette; Nelson, Alexander; Back, Trevor; Hassabis, Demis; Kohli, Pushmeet | Recent approaches propose inferring predictors from a variety of human-defined features using machine learning. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1331 | Identifying flow units by machine learning in a model metallic glass | Wu, Yicheng; Bai, Haiyang; Guan, Pengfei | We report the successful identification of flow units in the model Zr 50Cu 50 metallic glass above and below its glass transition temperature by machine learning methods. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1332 | Residual stress distributions and mechanical noise in athermally deformed amorphous solids from atomistic simulations | Ruscher, Céline; Rottler, Joerg | We reveal the evolution of P(x) upon deformation by combining atomistic simulations with the frozen matrix approach. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1333 | Interplay between rearrangements, strain, and softness and during avalanche propagation | Zhang, Ge; Ridout, Sean; Liu, Andrea | Here we study an athermal, jammed packing of Hertzian particles that is sheared quasistatically. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1334 | Structural evolution of amorphous systems during avalanches | Stanifer, Ethan; Manning, M. Lisa | Using numerical simulations of soft spheres, we find that avalanches can be decomposed into a series of localized excitations, and we develop an extension of persistent homology to isolate these excitations. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1335 | The behavior of jammed packings under correlated random forces | Roy, Sudeshna; Stanifer, Ethan; Manning, M. Lisa | We find that both the effective modulus with respect to the random forcing direction, as well as the average effective strain between rearrangements or saddle points, does change systematically with correlation length. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1336 | Understanding the boson peak in glasses and glassy polymers | Zaccone, Alessio | Understanding the boson peak in glasses and glassy polymers | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1337 | Revealing the low-temperature fast relaxation peak in a model metallic glass | Guan, Pengfei | Revealing the low-temperature fast relaxation peak in a model metallic glass | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1338 | Accuracy of Classical Potentials for Polyethylene Structures Away from Equilibrium | Frawley, Keara; Chen, Lihua; Tran, Huan; Thadhani, Naresh; Ramprasad, Ramamurthy | This work is a comparative study of two widely used classical potentials—Optimized Potentials for Liquid Simulations (OPLS) and the reactive force-field (ReaxFF)—with respect to DFT. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1339 | Disentangling glassy polymer dynamics: combining simulations and machine learning | Lappala, Anna | The problem of the glass transition combines the concepts of self-organization, collective and heterogenous dynamics and poses an unsolved fundamental problem in condensed matter physics. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1340 | Amorphous polymers in their glass transition regime : Comparison of local and macroscopic small non-linearities | Belguise, Aude; Lequeux, François; Cantournet, Sabine; Montes, Hélène | In this work, we focus on the onset of non-linearities where non-linear relaxation is accelerated in comparison to the linear case. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1341 | Atomic-scale understanding of highly conducting polymer electrolyte | Jung, Sungyeb; Song, Yeonhwa; Choi, U Hyeok; Park, Jae Hyun; Lee, Jaekwang | Here, we find that novel poly acrylic acid polymer-based electrolyte exhibits at least two orders of magnitude higher ionic conductivity compared with conventional solid polymer electrolytes. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1342 | Effects of Coarse-Graining on Molecular Simulations of Mechanical Properties of Polymers | Ge, Ting; Robbins, Mark | We develop a multi-scale method that uses properly selcted coarse-grained models to accelerate the simulation of mechanical response while fine-grained models to capture the accurate stress value. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1343 | Ubiquity of Entropy-Driven Local Organization | Klishin, Andrei; Van Anders, Greg | Here, we employ minimal models that artificially restrict system entropy to show that entropy drives systems toward local organization, even when the model system entropy is below reasonable physical bounds. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1344 | Measuring configurational entropy of glasses using population annealing | Amey, Chris; Machta, Jonathan | In this talk we present two methods to calculate the vibrational (S vib) and configurational (S c) entropies of glassy fluids in the context of population annealing Monte Carlo. We present numerical data for large-scale population annealing simulations of binary hard sphere fluids with 30, 60, and 100 particles. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1345 | Statistical structural and dynamic heterogeneity as signature of glass transition | Wang, Yunjiang; Han, Dong | Here I introduce two parameters based on the Shannon Information Entropy concept which can be served as intuitive signatures of glass transition. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1346 | RFOT theory explains fragile-to-strong crossover in Wigner glasses | Cho, Hyun Woo; Mugnai, Mauro; Kirkpatrick, Theodore; Thirumalai, Dave | We found that the prediction of the random first order transition (RFOT) theory quantitatively describes the universal feature of the glass transitions of the charged colloids, such as growing length scales associated with heterogeneous dynamics. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1347 | Cluster Dynamic Mean Field Theory of Glass Transition | liu, chen; Biroli, Giulio; Reichman, David; Szamel, Grzegorz | In this talk we will present CDMFT and present results for three dimensional super-cooled liquids. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1348 | Understanding TA from dynamic heterogeneity in metallic glass-forming liquids | Ren, Nannan; Guan, Pengfei; Wang, Lijin; Hu, Lina | Our findings provide a new insight of T A from the perspective of dynamic heterogeneity and shed light on the glass forming of metallic liquids. | Session 83: Understanding Glasses and Disordered Systems Through Computational Models |
| 1349 | Sound Scattering and Plasticity n Amorphous materials | Tanguy, Anne; Luo, Haoming; Desmarchelier, Paul; Gravouil, Anthony; Beltukov, Yaroslav; Lund, Fernando | In this talk, we will compare sound scattering in amorphous materials in the presence of inclusions. | Session 84: Understanding glasses and disordered systems through computational models |
| 1350 | Energy Dissipation in Amorphous Solids during Elastic Deformation | Grießer, Jan; Pastewka, Lars | Here we use large-scale molecular dynamics simulations to investigate energy dissipation mechanisms in a model amorphous solid and compare it to a crystalline solid. | Session 84: Understanding glasses and disordered systems through computational models |
| 1351 | Local excitations in re-heated ultrastable glasses | JI, WENCHENG; de Geus, Tom W. J.; Popović, Marko; Lerner, Edan; Wyart, Matthieu | We numerically study their frequency density D loc(ω) evolution under thermal cycles at different temperatures T, starting from ultrastable glass configurations where these excitations are gapped. | Session 84: Understanding glasses and disordered systems through computational models |
| 1352 | Cluster-flip colloidal and atomistic algorithms with background potentials | Kent-Dobias, Jaron; Sethna, James | We introduce an extension to cluster algorithms of colloidal and atomistic models that naturally incorporates nonuniform background potentials. | Session 84: Understanding glasses and disordered systems through computational models |
| 1353 | Accelerated relaxation in amorphous materials under cyclic loading with alternating shear orientation | Priezjev, Nikolai | We showed that with increasing strain amplitude in the elastic range, the system is relocated to deeper energy minima. | Session 84: Understanding glasses and disordered systems through computational models |
| 1354 | Mesoscale models of amorphous solids under cyclic shear: emergence and character of limit cycles. | Abdelshafy, Kareem; Tyukodi, Botond; Vandembroucq, Damien; Maloney, Craig | We use the mesoscale model to study the limit cycles at various strain amplitude. | Session 84: Understanding glasses and disordered systems through computational models |
| 1355 | Comparison of yielding behaviour in model network and atomic glasses | Bhaumik, Himangsu; Foffi, Giuseppe; Sastry, Srikanth | We investigate the manner in which such a transition is manifested in a model network glass, the BKS model of silica [3]. | Session 84: Understanding glasses and disordered systems through computational models |
| 1356 | Molecular Dynamics Study on Mechanical and Rheological Properties of Bulk Metallic Glass around Glass Transition Temperature | Yu, Ji Woong; Rahbari, S. H. Ebrahimnazhad; Lee, Won Bo | Using large scale computational power, we investigated the mechanical properties of the celebrated Kob-Andersen mixture, a model BMG, using active microrheology in molecular dynamics (MD) simulations. | Session 84: Understanding glasses and disordered systems through computational models |
| 1357 | Computational generation of voids in a-Si and a-Si:H by cavitation at low density | Guerrero, Enrique; Strubbe, David | Instead, we generate voids within a-Si and a-Si:H using a fast, unbiased approach: the Wooten-Winer-Weaire classical-potential Monte Carlo method where we vary the density and replace some Si-Si bonds with Si-H bonds. This work provides a set of void structures for further studies of their effects on degradation, hole mobility, two-level systems, thermal transport, and elastic properties. | Session 84: Understanding glasses and disordered systems through computational models |
| 1358 | Molecular Dynamics Simulation of Amorphous Oxides | Zhang, Rui; Jiang, Jun; Yazback, Maher; Mishkin, Alec; Cheng, Hai-Ping | To optimize their performance, efforts have been devoted to determining diffusive behavior of amorphous pure Ta 2O 5 as well as Ta 2O 5 with various dopants by classical molecular dynamics (MD) simulations. | Session 84: Understanding glasses and disordered systems through computational models |
| 1359 | Transient Structured Fluctuations Approaching 2D Kagome-Liquid Transition | Nowack, Linsey; Rice, Stuart | We study two 2D systems known to support an open-packed Kagome phase[1]. | Session 84: Understanding glasses and disordered systems through computational models |
| 1360 | Analysis of coarsening and aging in Ising spin glasses using record dynamics | Boettcher, Stefan; Rahman, Mahajabin | To that end, we use Ising spin models that interpolate between the spin glass and ferromagnet by varying the admixture of anti-ferromagnetic bonds from 50% to zero. | Session 84: Understanding glasses and disordered systems through computational models |
| 1361 | Many-body localization to spin glass phase transition in disordered spin-chain system | Li, Zeyang; Peng, Pai | We consider a disordered Heisenberg XXZ model with on-site random field and random anisotropy. | Session 84: Understanding glasses and disordered systems through computational models |
| 1362 | Stress and velocity fluctuations in photoelastic granular avalanches | Vriend, Nathalie; Thomas, Amalia; Daniels, Karen | In this study, we analyze the correlation between velocity fluctuations and stress fluctuations in both the quasi-steady layer (close to the rough base) and the flowing layer (near the free surface). | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1363 | Photoelastic Analysis of Cohesive Granular Aggregates | Patterson, Carter; Kollmer, Jonathan; Brzinski, Theodore | We present photoelasticimetric force measurements of systems of particles which exhibit attractive interparticle forces, and contrast the structure of force networks in these systems with the networks in purely repulsive aggregates. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1364 | Optical characterization of underwater contact mechanics | Sun, Mengyue; Kaur, Sukhmanjot | Here, we present a simple, FTIR-based imaging technique to spatially resolve and quantify thickness of nanoscopic puddles formed between two solids in contact under water. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1365 | Worms in Jell-O: Using photoelastic stress analysis to measure burrowing forces | Dorgan, Kelly | Worms in Jell-O: Using photoelastic stress analysis to measure burrowing forces | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1366 | Exploiting photoelasticity to characterize dynamics of polymer networks | Szczepanski, Caroline; Leslie, Kelsey-Ann; Doane-Solomon, Robert; Arora, Srishti; Driscoll, Michelle | In this work, we exploit the photoelastic behavior of polymer networks to characterize internal stresses that develop during swelling and subsequent rupture of hydrogels. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1367 | The local mechanics of macroscopic heterogeneous photoelastic polymer networks | Boots, Johannes N.M.; Schaap, Jorik; Dijksman, Joshua; Van der Gucht, Jasper; Kodger, Thomas | We will present the comparisons between simulations/experiments and explore the underlying mechanics of a polymer network in both the linear and non-linear regime just before network failure. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1368 | Direct force measurement of microscopic droplets pulled along soft surfaces | Khattak, Hamza; Dalnoki-Veress, Kari | We explore droplet dynamics on soft materials using a micropipette-based technique to simultaneously image, and measure the forces on, a microscopic droplet dragged along a soft interface. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1369 | Experimental Studies on Slow Impacts and Interaction with Regolith Covered Surfaces in Low Gravity | Kollmer, Jonathan | This talk I will give an overview of some recent experiments that explore ejecta generation and material redistribution from slow impacts into a granular bed under realistic space condtions. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1370 | Optical spatio-temporal control of active matter systems in 2-D. | Senbil, Nesrin; Lemma, Linnea; Dogic, Zvonimir; Fraden, Seth | Our goal is to control the defect velocity and their direction to guide them towards a certain destination. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1371 | Dynamical Inference of Forces Using Three-dimensional Tomographic Imaging of Dusty Plasmas | Yu, Wentao; Gogia, Guga; Mendez, Joshua; Wu, Brady; Burton, Justin | The method is robust to noise in the data, and can be applied to other many-body systems with complex interactions. | Session 85: Visualizing Forces in Soft Materials via Photoelastic and Other Optical Techniques |
| 1372 | Microscopic Theory of the Role of Strong Attractions on the Local Dynamics and Elasticity of Associating Copolymer Liquids | Ghosh, Ashesh; Schweizer, Kenneth | We construct a microscopic liquid state theory for how attractions between sticky groups regularly co-polymerized in a chain backbone affect local structure and dynamics of unentangled polymer liquids. | Session 86: Vitrimers and Associative Networks |
| 1373 | LINEAR VISCOELASTICITY AND FLOW OF SELF-ASSEMBLED VITRIMERS: THE CASE OF A POLYETHYLENE/DIOXABOROLANE SYSTEM | Ricarte, Ralm; Tournilhac, François; Cloître, Michel; Leibler, Ludwik | We investigated the linear viscoelasticity of a polyethylene (PE) vitrimer that has cross-linkable dioxaborolane maleimide grafts. | Session 86: Vitrimers and Associative Networks |
| 1374 | Effect of salt on viscoelasticity and conductivity in vitrimers and dynamic networks | Jing, Brian; Evans, Christopher | We have developed vitrimers made from polyethylene glycol, dynamic boronic ester crosslinks, and added Li salt that function as Li-ion conductors. | Session 86: Vitrimers and Associative Networks |
| 1375 | Understanding the Self-healing of Reversible Polymer Networks through Molecular Dynamic Simulation | Shen, Zhiqiang; YE, HUILIN; Li, Ying | In this work, a molecular dynamics / Monte Carlo hybrid coarse-grained model is developed to investigate the relaxation and self-healing behaviors of polymer networks with reversible crosslinking. | Session 86: Vitrimers and Associative Networks |
| 1376 | Role of Dynamic Bonds on Crystallization in Polyethylene Vitrimers | Soman, Bhaskar; Evans, Christopher | Here, we study the effects of dynamic bonds on the crystallization in PE vitrimers by preparing networks with exactly 8, 10, and 12 carbons (C 8-C 12) between dynamic boronic ester crosslink points. | Session 86: Vitrimers and Associative Networks |
| 1377 | Tuning vitrimer mechanics with prepolymer and crosslinker structure | Kalow, Julia | We combine physical organic approaches and mechanical characterization to correlate the activation energy for stress relaxation to molecular reactivity and macromolecular structure. | Session 86: Vitrimers and Associative Networks |
| 1378 | Catalyst and Architecture Effects in Polyester Dynamic Covalent Materials | Bates, Christopher | This talk will discuss the role of catalyst strength and building block architecture on dynamic covalent polyester exchange kinetics and mechanical properties. | Session 86: Vitrimers and Associative Networks |
| 1379 | Recycling of Poly(thiourethane) Thermosets Enabled by Thiourethane Bonds | Huang, Sijia; Podgorski, Maciej; Han, Xun; Bowman, Christopher | Here, we report findings on the dynamic nature of thiourethanes, and their application as a new class of recyclable analogs of urethane materials. | Session 86: Vitrimers and Associative Networks |
| 1380 | Rheology and Rupture of Partial Vitrimer | Cai, Shengqiang | To quantitatively understand the stress relaxation of the partial vitrimer, we developed a simple rheological model for it with certain combinations of spring and dashpot. | Session 86: Vitrimers and Associative Networks |
| 1381 | Investigation of viscoelastic behavior over wide temperature range in PDMS vitrimers | Porath, Laura; Evans, Christopher | We consider this temperature range to be a reaction-limited regime far above T g, where bond exchange kinetics dominate macroscopic relaxation. | Session 86: Vitrimers and Associative Networks |
| 1382 | Intrinsically reprocessable, self-healing elastomers | Cai, Liheng | Here, we propose a concept that exploits the self-assembly of block copolymers integrating strong physical associations and weak reversible hydrogen bonds to create an intrinsically reprocessable, self-healing elastomer. | Session 86: Vitrimers and Associative Networks |
| 1383 | Melt Recyclable Shape Memory Elastomers through Main Chain Association | Krajovic, Daniel; Anthamatten, Mitchell | Dynamic mechanical analysis reveals a stiffness plateau that persists to temperatures above the shape-triggering temperature. | Session 86: Vitrimers and Associative Networks |
| 1384 | Leveraging the Stability of Ionic Liquids in Processing Polyampholytes | Delgado, David; Gong, Jian Ping; Shull, Kenneth | In this work, an ionic liquid composed of choline chloride and urea is used to dissolve and rapidly deposit double network gels. | Session 86: Vitrimers and Associative Networks |
| 1385 | Electric Fields, Reorientation, and Water at the Air-water Interface of Iron and other Salt Solutions | Allen, Heather | We report evidence of interfacial iron (III) speciation and other ions and their interfacial hydration effects. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1386 | The structure and polarization of the water-graphene interface from molecular dynamics simulations and X-ray reflectivity experiments | Jimenez-Angeles, Felipe; Harmon, Katherine; Nguyen, Trung; Fenter, Paul; Olvera De La Cruz, Monica | Here we study the water structure and polarization next to uncharged graphene surfaces by means of molecular dynamics simulations and X-ray reflectivity experiments. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1387 | Polarizable Potentials For Metals: The Density Readjusting Embedded Atom Method (DR-EAM) | Bhattarai, Hemanta; Gezelter, J.; Newman, Kathie | We present a modification of the embedded atom method (EAM) which allows for electronic polarization of the metal by treating the valence density around each atom as a fluctuating dynamical quantity. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1388 | Orientational Dynamics of the Hydrogen-bonded OH of Interfacial Water | McGuire, John; Figge, Florian | We report on the orientational dynamics of the bonded OH (bOH) of interfacial water, i.e., the OH groups in which the H atom participates in a hydrogen bond (HB). | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1389 | Why are Water-Hydrophobe Interfaces Electrically Charged? | Nauruzbayeva, Jamilya; Sun, Zhonghao; Gallo Junior, Adair; Ibrahim, Mahmoud; Santamarina, J. Carlos; Mishra, Himanshu | Why are Water-Hydrophobe Interfaces Electrically Charged? | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1390 | Free Energy of Water Dissociation at the Water – TiO2 Interface from Ab Initio Deep Potential Molecular Dynamics | Selloni, Annabella | Free Energy of Water Dissociation at the Water – TiO2 Interface from Ab Initio Deep Potential Molecular Dynamics | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1391 | Laser-Assisted Dissolution of Geological Samples Submerged in Water: Evidence of Hydrothermal Processing | Durrant, Chad; Mariella, Raymond; Combitsis, Jordan; Weisz, David | We propose a mechanism, a hydrothermal surface interaction, by which this laser-assisted dissolution process occurs. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1392 | Intrinsic pH of water/vapor interface revealed by ion-induced water alignment | Chiang, Kuo-Yang; Dalstein, Laetitia; Wen, Yu-Chieh | Here we utilize phase-sensitive sum-frequency vibrational spectroscopy to quantify the surface density of protons (or their hydronium form) at the intrinsic water/vapor interface, through inspecting the surface-field-induced alignment of water molecules in the electrical double layer of ions. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1393 | The behavior of water confined between two hydrophobic surfaces with grafted polymeric segments studied using molecular simulations | Mehrani, Ramin; Sharma, Sumit | We have performed Indirect Umbrella Sampling (INDUS) molecular simulations to calculate the free energy barrier of evaporation of water confined between two hydrophobic surfaces grafted with polymeric segments. | Session 87: Water Dynamics in Different Environments: Experiment and Theory I. Interfacial Water |
| 1394 | Interfacial water: from atmospheric ice nucleation to nano-confinement | Michaelides, Angelos | Recent work from our research group in which we are trying to understand the intimate molecular level details of water freezing will be discussed. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1395 | Atomic imaging of edge structure and growth of a two-dimensional hexagonal ice | Ma, Runze; Cao, Duanyun; Zhu, Chongqin; Tian, Ye; Peng, Jinbo; Guo, Jing; Chen, Ji; Li, Xin-Zheng; Francisco, Joseph; Zeng, Xiao; Xu, Limei; Wang, Enge; Jiang, Ying | Here we show that noncontact atomic force microscopy with a CO-terminated tip allows real-space imaging of the edge structures of a 2D bilayer of hexagonal ice grown on an Au(111) surface. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1396 | Simulating Energy Relaxation in Pump–Probe Vibrational Spectroscopy of Hydrogen-Bonded Liquids | Dettori, Riccardo; Ceriotti, Michele; Hunger, Johannes; Colombo, Luciano; Donadio, Davide | We introduce a nonequilibrium molecular dynamics simulation approach, based on the generalized Langevin equation, to study vibrational energy relaxation in pump-probe spectroscopy. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1397 | Complete Lattice Vibration Dispersion Curves (36 Branches) for the Frozen (T=0K) Bernal-Fowler Hexagonal Close Packed Crystalline Ice with Four Water Molecules in One Primitive Unit Cell Containing 8 Protons and 4 Oxygen Nuclei | Jie, Bin; Jie, Cindy Tianhui; Sah, Chih-Tang | This talk gives the computed 36 branches of dispersion curves of Ice Ih at 0K, using six prime force constants, four values of which from isolated water molecule, further proving the connection of water’s crystalline solid phase and single molecule gas phase, by our 2013 melted-ice lattice model for the liquid phase of water. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1398 | Probing interfacial water by H-sensitive and non-invasive scanning probe microscopy | Jiang, Ying | In order to overcome these two grand challenges, we have developed a new-generation SPM based on a qPlus sensor, which is sensitive to H and non-invasive to water structure [1]. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1399 | Computed Lattice Vibration Frequency Spectra Explain the Abnormally High Electrical Mobilities of Positive and Negative Ions in Pure Liquid Water Using the Vibrational Force Constants of Oxygen and Hydrogen (Proton) Nuclei in its Solid and Gas Phases. | Sah, Chih-Tang; Jie, Cindy Tianhui; Jie, Bin | Our 2013 melted ice model extends the 1933 Bernal-Fowler Hexagonal Close Packed Ice crystal model to pure liquid water (0-100C). | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1400 | Nanoindentation of Ice Ih – Atomistic simulations | Santos-Flórez, Pedro; Ruestes, Carlos; De Koning, Maurice | Using molecular dynamics simulations we study the mechanical response of ice Ih through nanoindentation tests perpendicular to the basal plane. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1401 | Sum Frequency Generation Spectroscopy of Ice/Air and Water/Air Interfaces from Ab Initio Deep Potential Molecular Dynamics | Andrade, Marcos; Zhang, Linfeng; Selloni, Annabella; Car, Roberto | We here overcome this difficulty using Deep Neural Networks (DNN) to represent the ab initio potential energy surface. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1402 | How crystals form: a theory of nucleation pathways. | Lutsko, James | Classical Density Functional theory is combined with fluctuating hydrodynamics to describe nucleation in general and crystallization in particular. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1403 | Surface and bulk contributions to sum-frequency vibrational spectroscopy of single crystalline ice | Xiaofan, Xu; Shen, Yuen-Ron; Tian, Chuanshan | We study the bulk and surface contributions to the sum-frequency vibrational spectroscopy (SFVS) of ice I h(0001) interfaces in the bonded OH stretching band at 223K. | Session 88: Water Dynamics in Different Environments: Experiment and Theory II. Ice |
| 1404 | Investigating graphene oxide-aqueous interfaces | Kumar, Revati; David, Rolf; Subasinghege Don, Visal | Our efforts are focused on gaining molecular level insight into the interfacial ordering using molecular simulations. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1405 | Viscoelasticity and dynamics of nanoconfined water by atomic force microscopy | Hoffmann, Peter; Kramkowski, Edward; Khan, Shah | Here we will present an overview of our findings, including the observation of dynamic solidification, the effect of ions on ordering and dynamics, and the recent observation of the compression rate dependence of the effective viscosity. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1406 | Hydrogen bonding structure of confined water templated by a metal-organic framework with open metal sites | Hunter, Kelly; Rieth, Adam; Dinca, Mircea; Paesani, Francesco | Here, we investigate structural and dynamical properties of water adsorbed in Co 2Cl 2BTDD as a function of relative humidity using many-body molecular dynamics simulations with the MB-pol model. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1407 | Vibrational dynamics and quantum tunneling of water molecules in bassanite | Kolesnikov, Alexander; Anovitz, Lawrence {Larry}; Irle, Stephan | Using inelastic neutron scattering (INS) we studied dynamics of bassanite (CaSO 4*0.5H 2O), a structure of which has channels formed by CaO 8 and CaO 9 polyhedra with water molecules residing in the channels and occupying two different positions. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1408 | Structure and Dynamics of Aqueous Solutions in Carbon Nanotubes: Insights from First-Principles Simulations | Aydin, Fikret; Zhan, Cheng; Schwegler, Eric; Pham, Tuan Anh | We find that polarizable ions exhibit a stronger adsorption at the interfaces and these effects are found to be significantly enhanced under confinement. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1409 | One atom thick angstrom-scale capillaries: Water flow | Boya, Radha | We have developed a method for fabrication of narrow and smooth angstrom (Å) scale capillaries through van der Waals assembly of 2D-materials, with atomically flat sheets at the top and bottom separated by spacers made of 2D-crystals with a precisely controlled number of layers. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1410 | Nano-confined water and ions in cement pores | Goyal, Abhay; Palaia, Ivan; Ioannidou, Katerina; Trizac, Emmanuel; Pellenq, Roland; Del Gado, Emanuela | We use numerical simulations to study the behavior of water confined by planar surfaces in the presence of divalent ions. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1411 | Microscopic study of proton kinetic energy anomaly for confined water | Moid, Mohammad; Finkelstein, Yacov; Moreh, Raymond; Maiti, Prabal | We used classical MD method to deduce Ke(H) by calculating the proton vibrational density of states, H-VDOS, for the case of water inside single wall carbon nanotubes (SWCNT) of varying diameters. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1412 | Water dynamics in Evaporating Nanodroplets | Ruiz Pestana, Luis; Head-Gordon, Teresa | At the nanoscale, however, where large surface to volume ratios govern the behavior, and fluctuations play a major role, it remains unclear whether the continuum theories can be applied to predict the the response. | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1413 | A molecular view of glycerol-water hydrogen bonding patterns | Mackie, Cameron; Xu, Bo; Kostko, Oleg; chari, nikhil; zhang, emily; Head-Gordon, Martin; Ahmed, Musahid | A molecular view of glycerol-water hydrogen bonding patterns | Session 89: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water |
| 1414 | Systematic optimization of atomistic water models for molecular simulation using liquid/vapor surface tension data | Wang, Lee-Ping; Qiu, Yudong; Head-Gordon, Teresa; Nerenberg, Paul | To test this hypothesis we implemented new functionality into the automated ForceBalance optimization procedure for using surface tension data, and parameterized revised three-point and four-point rigid, fixed charge water models named TIP3P-ST and TIP4P-ST. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1415 | Kosmotrope and Chaotrope Salts Influence on Water Structural Relaxation and hydrogen Bond Dynamics Investigated by Coherent Quasielastic Neutron Scattering | Faraone, Antonio; Senses, Erkan; Mamontov, Eugene | Using coherent quasielastic neutron scattering, we have investigated the dynamics of NaCl/D O and KCl/D O, NaCl being a kosmotrope and KCl being a chaotrope, respectively. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1416 | The SCAN330 dataset of first-principles molecular dynamics simulations of water | LaCount, Michael; Gygi, Francois | We present the SCAN330 dataset of first-principles molecular dynamics simulations of liquid water [1] obtained using the Qbox code [2] and the SCAN meta-GGA density functional [3] at a temperature of 330 K. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1417 | Sensitizing Hydration Shells of Ions by Analyzing Water Dynamics Using High Sensitive Dielectric Spectroscopy | Lou, Djamila; DOAN, LUAn; Kesting, Henry; Nguyen, Vinh | In response, we have employed a highly sensitive, high-resolution, frequency domain, MHz to THz dielectric spectrometer that is sensitive to int ermolecular dynamics. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1418 | Spatio-temporal analysis of water molecules around DNA employing extended MHz-THz spectroscopy and MD simulations | Singh, Abhishek K; DOAN, LUAn; Nguyen, Vinh | Here we present a temperature-dependent study for dynamics of water molecules around salmon testes DNA, employing extended megahertz-terahertz dielectric spectroscopic technique and Fourier transform infrared spectroscopy supported by MD simulations. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1419 | Transient Anisotropy of Liquid Water | Novelli, Fabio; Ruiz Pestana, Luis; Bennett, Kochise; Dessmann, Nils; Sebastiani, Federico; Adams, Ellen; Saeedi Ilkhchy, Kamyar; Stavrias, Nikolas; Eless, Viktoria; Ockelmann, Thorsten; Colchero, Alejandro; Hoberg, Claudius; Schwaab, Gerhard; Head-Gordon, Teresa; Havenith, Martina | Here we report unprecedented non-linear THz experiments on water molecules in the liquid phase. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1420 | Strong orbital interactions of the Zundel cation H5O2+ with hydration shell water | Ekimova, Maria; Kleine, Carlo; Ludwig, Jan; Ochmann, Miguel; Gustafsson, Thomas A.; Kozari, Eve; PINES, EHUD; Huse, Nils; Wernet, Philippe; Odelius, Michael; Nibbering, Erik T. J. | With our flatjet system for x-ray absorption spectroscopy in transmission, now succesfully operating for the polar acetonitrile solvent, and in combination with previously obtained laboratory infrared spectroscopic data, we can establish a systematic structural approach to hydrated proton structures in solution. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1421 | Molten hydrate clathrates as a new class of macromolecular fluids. | Lopez-Bueno, Carlos; Herreros-Lucas, Carlos; Bittermann, Marius; Amigo, Alfredo; Woutersen, Sander; Giménez-López, Maria del Carmen; Rivadulla, Francisco | Here we demonstrate the formation of a supramolecular liquid in ≈1.4-2.2m aqueous solutions of tetrabutyl ammonium bromide. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1422 | A New Model for the Structure and Dynamics of the Hydrated Proton in Liquid Acetonitrile and Water | Kozari, Eve; Sigalov, Mark; Pines, Dina; Fingerhut, Benjamin; PINES, EHUD | A new proton-solvation and -transport model in aqueous solutions is proposed based on our combined NMR and IR experiments and theoretical quantum–classical-molecular-dynamics findings. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1423 | Determination of Ion–Water Correlated Motions in Aqueous Salt Solutions | Shinohara, Yuya; Matsumoto, Ray; Thompson, Matthew; Dmowski, Wojciech; Ryu, Chae Woo; Iwashita, Takuya; Ishikawa, Daisuke; Baron, Alfred; Cummings, Peter; Egami, Takeshi | We report on the real-space correlated motion of water molecules and ions in an aqueous salt solution. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1424 | Lysozyme Solution-State Tertiary Structure Measured in Protic and Aprotic Ionic Liquid Aqueous Mixtures | Reyes, Ian; Banuelos, Jose | Aqueous protic ionic liquid (PIL) mixtures are interesting solvent media for the stabilization of proteins over wide temperature ranges, which may help develop long term protein storage methods or high temperature catalysis applications. | Session 90: Water Dynamics in Different Environments: Experiment and Theory IV. Bulk Water and Solute Hydration |
| 1425 | From dewetting to adhesion rupture – moving lines in dissipative, heterogeneous systems | Barthel, Etienne; Ciccotti, Matteo | In fact, even for homogeneous systems, evaluating the dissipation is still often a problematic question and the most simple cases – dewetting newtonian liquid or adhesion rupture for a linear viscoelastic solid – are far from being completely understood, especially when confrontion with experimental results is intended… Here we consider the dynamics of a front in a dissipative material moving on a heterogeneous surface at finite velocity. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1426 | Adhesion in Capillary Assembled Origami Structures | Twohig, Timothy; Croll, Andrew | In this work, we experimentally study thin-film/substrate and thin-film/thin-film adhesive interactions in order to explore the interplay between capillary forces, thin-film elasticity, bending, and adhesion. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1427 | Morphology of adhesive creases | Essink, Martin; Pandey, Anupam; Karpitschka, Stefan; Limbeek, Michiel; Snoeijer, Jacco | From this we derive a scaling theory for the intricate bifurcation scenario, explaining the hysteretic nucleation of adhesive creases. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1428 | Energy Approach to Understand Contact Mechanics on Rough Surfaces | Dalvi, Siddhesh; Gujrati, Abhijeet; Jacobs, Tevis; Pastewka, Lars; Dhinojwala, Ali | Here, with experimentally controlled elastic modulus, roughness and surface chemistry, we demonstrate that the reduction in work of adhesion is equal to the energy required to achieve conformal contact. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1429 | Interfacial tension measurement of reconstructive interfaces | Yokoyama, Hideaki; Saito, Masayuki | To measure interfacial tension of reconstructive interface, we developed a novel method using elastomer thin films floating on water. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1430 | Capillary instability of soft cylinders: Dynamical selection of nonlinear states | Kansal, Minkush; Pandey, Anupam; Herrada, Miguel; Eggers, Jens; Snoeijer, Jacco | Here we reveal the intricate morphologies that can be encountered during the capillary collapse of an elastic cylinder, from minimisation of capillary and elastic energy. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1431 | How Aqueous Salt Solutions Affect Hydrophobic Surfaces | Poynor, Adele; Hornberger, Cayton; Rohaley, Grace; Sebolt, Juliana | We study this damage for a variety of self-assembled monolayers (SAMs) in different aqueous salt solutions, using contact angle measurements, scanning electron microscopy, surface plasmon resonance. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1432 | Determination of Interfacial Strain on Single-Layer Graphene Due to Ice Adhesion | Kattel, Subash; Murphy, Joseph; Pasco, Samuel; Ackerman, John; Alvarado, Vladimir; Rice, WIlliam | Here, we use Raman spectroscopy to non-perturbatively and contactlessly measure ice-induced strain. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1433 | Capillary imbibition in a square tube | Yu, Tian; Zhou, Jiajia; Doi, Masao | We propose coupled equations for liquid imbibition in both parts and show that the lengths both increase in time following Lucas–Washburn’s law, but the coefficients are different from those obtained in the previous analysis that ignored the coupling. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1434 | Multiphase Flow Through Hairy Channels | Ushay, Christopher; Jambon-Puillet, Etienne; Brun, Pierre-Thomas | By displacing the oil with water at Ca<<1, we study the geometry and contact line dynamics of the evolving interface and the impact of confinement on oil removal. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1435 | Rate control of blister inflations and the skin patterns | Shen, Tong; cerda, Eduard; Vernerey, Franck | Through a combination of experiment and theoretical modeling, we find that competition between these time scales may trigger two instabilities, namely the membrane’s thinning instability and the delamination instability. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1436 | Rupture noise of a moving contact line | Yan, Caishan; Guan, Dongshi; Lai, Pik-Yin; Chen, Hsuan-Yi; Tong, Penger | Here, we report the avalanche statistics of a moving contact line (CL) pulled by an AFM-based hanging glass fiber through a liquid-air interface. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1437 | Soft Wetting and Phase Separation on Swollen Polymer Networks | Cai, Zhuoyun; Pham, Jonathan | We implement confocal microscopy to visualize the crosslinked polymer and solvent phase separately during soft wetting. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1438 | Spreading dynamics of water onto soluble polymer coatings with hydrophobic insoluble patterns | Melides, Solomon; Brown, Jonathan; Keddie, Joseph; Ramaioli, Marco | This study introduced surface heterogeneity by inkjet printing hydrophobic fat patterns at controlled area fractions 0-50% onto thin soluble polymer coatings of maltodextrin to assess the impact on the water spreading dynamics, at controlled ambient RH. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1439 | Tape Loop Adhesion | Elder, Theresa; Twohig, Timothy; Croll, Andrew | By using both polydimethylsiloxane (PDMS) and polycarbonate (PC) as ‘tape’ materials, we explored the mechanics of both ‘tacky’ and dry adhesive systems. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1440 | Elastocapillarity and Rolling Dynamics of Solid Nanoparticles | Tian, Yuan; Liang, Heyi; Dobrynin, Andrey | We use molecular dynamics simulations of rolling dynamics of solid nanoparticles with size Rp in contact with soft elastic substrates to elucidate effect of capillary, elastic and friction forces on rolling motion. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1441 | Understanding Elastomeric Contact Interfaces in the Presence of Water | Kumar, Nityanshu; Kaur, Sukhmanjot; Dalvi, Siddhesh; Dhinojwala, Ali | In this work, we have studied the contact interface between hydrophobic PDMS and hydrophilic sapphire substrate in dry and wet conditions using infrared-visible sum-frequency generation (SFG) spectroscopy and macroscopic Johnson-Kendall-Roberts (JKR) adhesion measurements. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1442 | Universal Scaling Behavior of the Tackiness of Polymer Melts | Wang, You; Zhou, Aiping; Wang, Xiaorong | This presentation describes the measurement of stickiness or tackiness, as measured by the peak force to pull off a cylindrical probe from neat polyisoprene melts, the latter of varying materials and surface roughness, over a range of separation speeds. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1443 | Spreading dynamics of water droplets on hydrophilic surfaces | Tsige, Mesfin; Bekele, Selemon | In this work, we will present results on the spreading behaviour of water droplets of varying sizes on a completely wetting surface investigated using fully atomistic molecular dynamic simulations. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1444 | Multi-scale model of gas transport through soap-film membranes used for Artificial Photosynthesis | Falciani, Gabriele; Franklin, Ricardo; Hassanali, Ali; Chiavazzo, Eliodoro | Here, we specifically focus on gas transport through those membranes realized in the form of functionalized soap-films. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1445 | The role of crystallization, dewetting, and contact angle in the formation of high aspect ratio crystals | Giso, Mathew; Zhao, Haoda; Spicer, Patrick; Atherton, Tim | We present a process to produce crystals with a controllable aspect ratio using just oil and water in an easily scalable process. | Session 91: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1446 | Hot topics and lukewarm opportunities for soft matter science up in the sky | Piazza, Roberto | Hot topics and lukewarm opportunities for soft matter science up in the sky | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1447 | Non-equilibrium behaviour of colloidal systems. | Frenkel, Daan | In my talk, I shall discuss some of these problems and indicate how the study of colloidal systems in the presence or absence of gravity might help us gain a better understanding of the physical processes that drive active matter. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1448 | Squeezing order out of disorder | Martiniani, Stefano; Guo, Buming; Lemberg, Yuval; Chaikin, Paul; Levine, Dov | I will show that correlation lengths can be obtained by decimation, thinning a configuration by sampling data at increasing intervals and recalculating the CID. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1449 | ESA microgravity program for Soft Matter research | Braibanti, Marco | This will enable the systematic study of Soft Matter systems which covers the entire range of particle sizes from colloids to granular materials. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1450 | Electric field driven aggregation of negatively and positively polarized particles in dilute suspensions | Khusid, Boris; Lei, Qian; Elele, Ezinwa | We will report experimental data on the field driven structure formation in suspensions and present our approach to the development of ISS experiments. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1451 | Structure and dynamics of a two-dimensional colloid of liquid droplets | Klopp, Christoph | We investigate the internal dynamics in these lattices [2]. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1452 | Shapes and forms for 2D liquid crystal materials | Cheng, Zhengdong; Huang, Dali; Okeibunor, Ugochukwu | We will discuss the challenges for controlling the size, shape and forms of 2D materials in general. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1453 | Model hard ellipsoids: the practical matter of producing them | Hollingsworth, Andrew; Chaikin, Paul; Kondic, Lou; Reich, Alton; Khusid, Boris | We report on our efforts to reproduce and refine this benchmark polymer colloid, including the recent synthesis of hard ellipsoids for random and ordered packing studies in microgravity*. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1454 | Coarsening of two-dimensional island emulsions on smectic liquid crystal bubbles in microgravity | Park, Cheol; Minor, Eric; MacLennan, Joseph; Glaser, Matthew; Clark, Noel; Klopp, Christoph; Trittel, Torsten; Stannarius, Ralf | We report here on the observed dynamics of island growth and disappearance in the absence of coalescence at locations in the island emulsion far from the meniscus around the bubble inflation needle. | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |
| 1455 | Temperature-gradient-induced thermomigration in smectic liquid crystal bubbles and freely suspended films in microgravity | Clark, Noel; Park, Cheol; Minor, Eric; MacLennan, Joseph; Glaser, Matthew; Trittel, Torsten; Eremin, Alexey; Harth, Kirsten; Stannarius, Ralf | Temperature-gradient-induced thermomigration in smectic liquid crystal bubbles and freely suspended films in microgravity | Session 92: Workshop: Grand Challenges in Soft Matter and Opportunities for Microgravity Research |