Highlights of Soft Matter (DSOFT) Talks @ APS 2021 March Meeting (2)
American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2021, the meeting will be held online due to 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) 2
| Title | Authors | Highlight | Session | |
|---|---|---|---|---|
| 990 | Calibration Challenges for Measuring Multi-Legged Ground Contact Forces | Wu, Ziyou; Revzen, Shai | We present the force-torque sensing framework used in our robot and the present challenging calibration problems that arise. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 991 | Leveraging Aerodynamic Drag for Tails in Legged Robot Locomotion | Norby, Joseph; Li, Jun Yang; Selby, Cameron; Patel, Amir; Johnson, Aaron | We present a model of the dynamics induced by aerodynamic drag and from this derive a metric that allows for direct comparison between aerodynamic and inertial tails. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 992 | Towards an Insect Inspired Segmented Robot Leg for Passive Deflection Over Steps | Lathrop, Emily; Tolley, Michael; Gravish, Nick | Inspired by the multi-segmented architecture of insect legs, we have developed a 3D printed segmented robot leg that allows a walking robot to passively deflect over obstacles in the swing phase and bear weight during the stance phase. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 993 | Arachnids as systems for robophysical study | Spagna, Joseph | We suggest that for these varied arachnid adaptations, robotic systems can be used to better test- and possibly optimize- key mechanisms of these systems and their analogs. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 994 | A Motion Planning Framework for Dynamic Monopedal Locomotion on Deformable Terrain | Lynch, Daniel; Lynch, Kevin; Umbanhowar, Paul | We apply our framework to the task of finding period-1 hopping gaits for a monopedal robot. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 995 | Optimizing Contact Area and Joint Stiffness of a Passive Foot-Ankle Exoskeleton for Locomotion on Deformable Terrain | Gosyne, Jonathan; Sawicki, Gregory | We modelled an exoskeletal device with variable ankle stiffness and foot contact area coupled to a Hill-Type model representing the calf-Achilles tendon MT. During fixed frequency locomotion cycles, we found terrain-specific exoskeleton parameters that eliminated the P met penalty incurred during locomotion on sand vs. solid ground. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 996 | An insect-scale robot reveals the effects of different body dynamics regimes during open-loop running in feature-laden terrain. | SCHIEBEL, PERRIN; Cerbone, Henry; Wood, Robert | We used the quadrupedal Harvard Ambulatory MicroRobot to study trot and pronk gaits at vertical and pitch/roll body resonances and above resonance. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 997 | Reactive velocity control reduces the energetic cost of transport for a direct-drive robot on granular media | Roberts, Sonia; Koditschek, Daniel | The simulations used a bulk-behavior model of the forces exerted by granular media in response to intrusion. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 998 | Collective transport in an entangled robotic worm blob | Ozkan-Aydin, Yasemin; Bhamla, Saad; Goldman, Daniel | Here, we develop a robophysical model of the collective dynamics of physically entangled collectives, worm blobs, where thousands of centimeter-long aquatic worms knot their bodies to form large-scale aggregates capable of surviving extended desiccation, mechanical impacts and directed locomotion under temperature gradients. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 999 | Toward a Simple Model for Friction Dominated Multi-legged Locomotion | Zhao, Dan; Revzen, Shai | We have previously shown that multi-legged animals and robots almost inevitably slip a great deal, and that an alternative, non-Coulomb friction anzats provided promising simulation results with far less complexity. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 1000 | Enhancing Legged Robot navigation of Rough Terrain via Use of a Tail | Soto, Daniel; Goldman, Daniel | Here we take a different approach, augmenting the emergent high-performance capabilities of a compliant-legged robot with a simple controllable tail. | Session 58: Robophysics: Robotics Meets Physics: Legged locomotion |
| 1001 | Membrane Binding of poly(butylene oxide)-poly(ethylene oxide) Block Polymers | Van Zee, Nicholas; Lodge, Timothy; Hillmyer, Marc | This study investigates the effect of hydrophobicity on polymer/membrane binding. | Session 59: Polymers and Block copolymers at Interfaces |
| 1002 | Tailoring adhesion and wettability of thin polymer films with surface-active bottlebrush polymer additives | Laws, Travis; Mei, Hao; Terlier, Tanguy; Verduzco, Rafael; Stein, Gila | This work demonstrates a method to tailor surface properties by using a combination of energetic and entropic effects to drive additives toward interfaces, followed by a simple post-deposition reaction to increase the additive’s polarity and tailor related functions. | Session 59: Polymers and Block copolymers at Interfaces |
| 1003 | Large-scale Reversible Domain Restructuring Mechanism between Direct (Solvent) Immersion Annealing and Thermal Annealing in Lamellar Block Copolymer Films | Sharma, Kshitij; Masud, Ali; Yuan, Guangcui; Satija, Sushil; Karim, Alamgir | We investigate the origins of drastically different domain spacing achieved in dried L-BCP films after immersion in a mixture of controlled good/intermediate/poor solvent, termed direct immersion annealing (DIA), compared to thermal melt annealing. | Session 59: Polymers and Block copolymers at Interfaces |
| 1004 | Controlling Block Polymer Interfaces for Next-Generation Membrane Separations | Boudouris, Bryan | In this way, we demonstrate that membranes cast from these materials separate ionic species of similar size. | Session 59: Polymers and Block copolymers at Interfaces |
| 1005 | Field Theoretic Simulation Study of Order-to-disorder Transition of Block Copolymers Confined within Neutral Surfaces | Kim, Jaeup; Yong, Daeseong | In this study, we investigated the order-to-disorder transition (ODT) behavior of multiple-layered cylinder- and lamella-forming block copolymer (BCP) films with neutral boundary conditions. | Session 59: Polymers and Block copolymers at Interfaces |
| 1006 | Effect of Conformational Asymmetry on the Stability of Network Phases in Diblock Copolymer Melts | Chen, Pengyu; Dorfman, Kevin | Motivated by the ability of conformational asymmetry to stabilize Frank-Kasper phases in sphere forming morphologies, we perform simulations using self-consistent field theory (SCFT) to investigate the influence of conformational asymmetry on the stability of network phases in a diblock copolymer melt. | Session 59: Polymers and Block copolymers at Interfaces |
| 1007 | Predicting excess free energy of mixing for molecular mixtures by inducing phase separation in simulations. | Shetty, Shreya; Agarwala, Puja; Gomez, Enrique; Milner, Scott | We have developed a method that combines molecular dynamic simulations and thermodynamic integration along the path of transformation of molecules to measure the excess free energy of mixing of molecular mixtures. | Session 59: Polymers and Block copolymers at Interfaces |
| 1008 | Irreversible Physisorption of PS-b-PMMA for Neutral Layer | Lee, Wooseop; Kim, Yeongsik; ahn, Hyungju; Ryu, Du Yeol | In this study, we succeeded in guiding perpendicular microdomains of polystyrene- b-poly(methyl methacrylate) (PS- b-PMMA) film with the aid of the irreversibly-adsorbed neutral layer made of PS- b-PMMA and evaluated its compositional randomness in terms of the correlation length ( ξ). | Session 59: Polymers and Block copolymers at Interfaces |
| 1009 | Designing A-b-(B-r-C) block copolymers for lithographic applications | Dahal, Yuba; Feng, Hongbo; De Pablo, Juan; Nealey, Paul; Kline, R. Joseph; Audus, Debra | Here we perform all atom molecular dynamics simulations to determine the effects of chemistry on the density and surface energy. | Session 59: Polymers and Block copolymers at Interfaces |
| 1010 | Ionic Liquid Enhanced Long-Range Ordering in Lamellar Block Copolymer Films | Masud, Ali; Douglas, Jack; Karim, Alamgir | In this work we use IL to enhance χ , and attain lamellar films with lower defects and enhanced parallel stratification in high Mw and thickness films. | Session 59: Polymers and Block copolymers at Interfaces |
| 1011 | Order to Order Transition from Cylindrical to Lamellar Microdomain Upon Heating with Upper Critical Ordering Transition Block Copolymer | Ahn, Seonghyeon; Seo, Yeseong; Duan, Chao; Zhang, Lixun; Li, Weihua; Kim, JinKon | Here, we investigated the OOT of polystyrene-block-polyisoprene-block-polystyrene-block-polyisoprene (S 1I 1S 2I 2) linear tetrablock copolymer at the symmetric volume fraction of total PS and PI blocks but asymmetry of PI block (τ PI = f PI1 /(f PI1+f PI2) = 0.192), in which f PI1 and f PI2 are the volume fractions of PI in the second and forth blocks, respectively). | Session 59: Polymers and Block copolymers at Interfaces |
| 1012 | Inverted cylindrical microdomains by binary blends of AB/AC block copolymers with hydrogen bonding interactions | Kang, Sukwon; Kim, JinKon | In this study, we obtained inverted cylindrical structures consisting of the major block in the minor matrix by using a binary blend consisting of lamella-forming polystyrene- block-poly(2-vinylpyridine) (PS- b-P2VP) and polystyrene- block-poly(4-hydroxystyrene) (PS-b-PHS), where hydrogen bonding occurs between P2VP and PHS blocks. | Session 59: Polymers and Block copolymers at Interfaces |
| 1013 | End-on orientation of poly(3-alkylthiophene)s by microphase separation of amphiphilic diblock copolymer | Kim, Philgon; Kim, JinKon | To fabricate end-on orientation of poly(3-alkylthiophene) (P3AT) where the polymer main chains are vertically oriented on the substrate, we synthesized poly(3-dodecylthiophene)-block-poly(3-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)methylthiophene) copolymer (P3DDT- b-P3TEGT) using the GRIM method. | Session 59: Polymers and Block copolymers at Interfaces |
| 1014 | From dewetting to adhesion rupture – moving lines in dissipative, heterogeneous systems | Barthel, Etienne | 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 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1015 | Modeling Elastocapillary Adhesion of Compliant Gel Microspheres | Giso, Mathew; Lyons, Edgar; Headley, Joseph; Kuwaye, Emily; Jensen, Katharine; Atherton, Tim | To better understand this system, we have built on previous contact and capillary models to develop a formulation which includes elasticity, adhesion, and surface tension. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1016 | Elastocapillary Adhesion of Compliant Gel Microspheres | Headley, Joseph; Lyons, Edgar; Giso, Mathew; Kuwaye, Emily; Atherton, Tim; Jensen, Katharine | In this work, we investigate the adhesion between polydimethylsiloxane (PDMS) gel microspheres and rigid glass substrates. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1017 | Dynamic Measurements of Adhesive Contact with a Soft Gel | Patino, Nicholas; Kim, Hyeongjin; Duncan, Aidan; Jensen, Katharine | We use interference, brightfield, and confocal microscopy, respectively, to directly measure the 3D, time-dependent deformation of the gel surface from high-speed sub-micrometer deformations at the initiation of contact to longer-time structural equilibration on the scale of tens of micrometers. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1018 | Viscoelastic Patch De-adhesion from Wrinkling Surfaces as a Model of Realistic Thrombus Behavior | Nguyen, Nhung; Velankar, Sachin; Tzeng, Edith; Cerda, Enrique; Pocivavsek, Luka | Finite element and analytical models based on energy minimization are developed to undertake a parametric study with varying relaxation properties, adhesion energies, and loading rates to determine their correlations with critical delamination amplitudes. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1019 | Viscous peeling of a graphene sheet | Agrawal, Adyant; Gravelle, Simon; Kamal, Catherine; Botto, Lorenzo | To get insights into the process of liquid-phase exfoliation of graphite into graphene, we study numerically and theoretically the dynamics of a peeling front in a system of two adhered carbon nanosheets immersed in water. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1020 | Optical Characterization of Underwater Contact Mechanics | Sun, Mengyue; Kumar, Nityanshu; Dhinojwala, Ali; King, Hunter | Here, we present an FTIR-based imaging technique to spatially resolve and quantify the thickness of puddles formed between two solids in contact underwater. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1021 | Interfacial Interactions of Bioinspired Underwater Adhesives | Narayanan, Amal; Kaur, Sukhmanjot; Dhinojwala, Ali; Joy, Abraham | The presentation will introduce the need for underwater adhesives and our synthetic strategies to overcome the challenges in underwater adhesion. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1022 | "Detachment of an inclined micro-pillar from a dissimilar substrate" | KUMAR, NITISH; Khaderi, Syed Nizamuddin | The physical mechanisms that lead to this behavior have not been quantitively detailed yet, and this is the objective of our work. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1023 | Quantifying failure in geometrically confined adhesives by pressure-induced cavitation | Wahdat, Hares; Elzière, Paul; Srinivasan, Siddarth; Chan, Nicky; Crosby, Alfred | We combine experiments with finite element analysis to develop models relating the pressure response in acrylic adhesives and silicone elastomers to their quanitative bulk and interfacial properties, including the elastic modulus and the critical strain energy release rate. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1024 | Influence of wetting and adhesion on dynamic drying of a hydrogel disk | Louf, Jean-Francois; Browne, Christopher; Bhattacharjee, Tapomoy; Datta, Sujit | Here, we investigate how different boundary conditions can lead to different compacting patterns of the skeletal polymer network and subsequent different drying dynamics over time. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1025 | Elastocapillarity-induced adhesion switching in nanochannels | Ronceray, Nathan; Spina, Massimo; Chou, Vanessa Hui Yin; Garaj, Slaven | In this work, we took full advantage of the atomic smoothness, mechanical strength and flexibility of 2D multi-layered van der Waals materials to design switchable nanocontainers/nanochannels by reversibly controlling the interfacial adhesion through capillarity. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1026 | 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 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1027 | Do soft solids have strain-dependent surface tension? | Bain, Nicolas; Style, Robert; Dufresne, Eric | Here, we describe new experiments investigating possible strain-dependence of the surface tension of a soft solid, in the absence of potentially confounding geometric singularities. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1028 | Contact drawing of core-shell polymer fibers using an aqueous two-phase system | PALIT, SWOMITRA; Frampton, John; Kreplak, Laurent | Our study explores the contact drawing technique and a special class of water-in-water mixtures known as aqueous two-phase systems (ATPSs) to produce core-shell fibers. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1029 | Multiple drops interacting on swelling fibers | Van de Velde, Pierre; Duprat, Camille; Protière, Suzie | In this talk, I will show how the Plateau-Rayleigh instability can be affected by the swelling of the fiber. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1030 | Fluid separation and network deformation in wetting of soft and swollen elastomers | Cai, Zhuoyun; Skabeev, Artem; Morozova, Svetlana; Pham, Jonathan | We use confocal microscopy to visualize the crosslinked polymer and solvent separately at the wetting ridge. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1031 | Contact Angle Hysteresis from a thin film suspended on a liquid surface | Zhou, Nuoya; Kumar, Deepak; Davidovitch, Benjamin; Menon, Narayanan | We introduce a new probe of contact angle hysteresis in a one-dimensional geometry, similar to a Wilhemy plate. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1032 | Unraveling stability of a floating liquid marble and its collapse patterns | Apoorva, Sneha Ravi; Dalvi, Sameer | Our aim was to analyze collapse dynamics of floating LMs, stability and resulting collapse patterns. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1033 | Curvature-dependent Contact Angles | Ma, Chen; Chen, Chao; Lv, Cunjing; Zheng, Quanshui | This work presents for the first time a molecular perspective of curvature effect on the contact angles. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1034 | Interfacial tension and wettability of water solution on hydrophilic and hydrophobic surfaces | Shen, Meng | Here, using atomistic and coarse-grained molecular dynamics simulations, we study the interfacial tension and wettability of water containing amphiphilic molecules, charged surfactants and active surfactants against hydrophilic and hydrophobic surfaces. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1035 | Discontinuous curvature in a thin-film profile near a three-phase contact line | Kumar, Deepak; Menon, Narayanan; Davidovitch, Benjamin | In this work, we address the nature of such a singular behavior when the solid phase is very stiff but also highly bendable. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1036 | Non-Sticking Polymeric Surfaces: Dynamics of Nano Structured Fluorinated Polymeric Thin Films | Perahia, Dvora; Senanayake, Manjula; Sinha, Sunil | Here we report Xray Photon Corelation Spectroscopy (XPCS) study of the interfacial dynamics of thin liquid films of semi-fluorinated polymer melts that consist of alternating fluorinated and protonated segments. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1037 | Anisotropic wetting on simple, flat surfaces | Smith-Mannschott, Katrina; Xu, Qin; Bain, Nicolas; Heyden, Stefanie; Dufresne, Eric; Style, Robert | We show that, surprisingly, even soft, flat surfaces exhibit anisotropic wetting – both in statics and dynamics. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1038 | A Computational Mesoscale Study of the Adhesion of Nanocarriers to Endothelial Cells | Akbari, Saeed; Khani, Shaghayegh; Maia, Joao | Herein, we present a computational analysis of nanocarrier adhesion to and absorption by endothelial cells through Dissipative Particle Dynamics simulations. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1039 | Surface textures suppress visco-elastic braking on soft substrates | Coux, Martin; Kolinski, John | We show that the superhydrophobic Cassie state, where a droplet is supported atop air-immersed textures, is preserved on soft textured substrates. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1040 | Wetting Driven Globule-to-Brush Transition of Polymer-grafted Surfaces | Etha, Sai; Desai, Parth Rakesh; Sachar, Harnoor; Das, Siddhartha | We employ Molecular Dynamics (MD) simulations to probe the spreading and imbibition of a liquid drop on a surface grafted by polymer molecules and observe their transition from an initially collapsed globule-like state, to a brush-like state upon wetting. | Session 60: Wetting and Adhesion of Soft Materials: Dynamics and Instability |
| 1041 | Effects of Heterogeneous Segmental Friction on the Multi-Scale Dynamics of Polymer Nanocomposites | Young, Walter; Saez, Joseph; Kumlin, Thomas; Fukao, Koji; Katsumata, Reika | The effect of 2VP content in the copolymer on the multi-scale dynamics of the system will be discussed in this presentation. | Session 61: Polymer Nanocomposites: Dynamics |
| 1042 | Viscoelastic Properties of Wrinkled Graphene Reinforced Polymer Nanocomposites – Effect of Interlayer Sliding Among Graphene Sheets | Wang, Yitao; Breslin, Jane; Chiang, Cho Chun; Meng, Zhaoxu | Building upon the developed coarse-grained models of MLGS and PMMA coupled with molecular dynamics simulations, we have systematically investigated wrinkled MLGS reinforced PMMA nanocomposites with different numbers of graphene layers and different configurations of the wrinkles. | Session 61: Polymer Nanocomposites: Dynamics |
| 1043 | Dynamical Decomposition in Model Polymer Nanocomposites under Creep | Yang, Entao; Pressly, James; Natarajan, Bharath; Winey, Karen; Riggleman, Robert | We prove that our decomposition can be further expanded to PNCs under creep, at least within the linear response region. | Session 61: Polymer Nanocomposites: Dynamics |
| 1044 | 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 61: Polymer Nanocomposites: Dynamics |
| 1045 | Dynamic Properties of Filled Elastomers | Dhara, Deboleena; Rahman, Md Anisur; Abbas, Zaid; Benicewicz, Brian; Couty, Marc; Vlassopoulos, Dimitris; Kumar, Sanat | In this study, we use polymer grafted silica particles to get better control over the dispersion of the particles in an elastomeric matrix. | Session 61: Polymer Nanocomposites: Dynamics |
| 1046 | Dynamics of Nanorods in Polymer Melts | Wang, Jiuling; Ge, Ting; O’Connor, Thomas; Grest, Gary | We perform molecular dynamics simulations of thin nanorods in polymer melts, where the rod diameter is equal to the monomer size. | Session 61: Polymer Nanocomposites: Dynamics |
| 1047 | Unusual High-Frequency Mechanical Properties of Polymer Grafted Nanoparticle Melts | Jhalaria, Mayank; Cang, Yu; Huang, Yucheng; Benicewicz, Brian; Kumar, Sanat; Fytas, George | We use Brillouin light scattering to characterize the high-frequency mechanical response of polymer-grafted nanoparticle (GNP) melts where the grafted chain molecular weight and grafting density is systematically varied at fixed NP size (diameter, D=16 nm). | Session 61: Polymer Nanocomposites: Dynamics |
| 1048 | Magnetic Heat Generation Mechanisms of Iron Oxide–Poly(ethylene oxide) Nanocomposites | Weiblen, Donovan; Rende, Deniz; Akcora, Pinar; Ozisik, Rahmi | Magnetic Heat Generation Mechanisms of Iron Oxide–Poly(ethylene oxide) Nanocomposites | Session 61: Polymer Nanocomposites: Dynamics |
| 1049 | Structure and dynamics of polymer nanocomposites with different interactions | Genix, Anne-Caroline; bocharova, Vera; Sokolov, Alexei; Oberdisse, Julian | In the second polydisperse and disordered SB system, we propose a reverse Monte-Carlo analysis of the scattering data giving access to NP aggregate mass distributions. | Session 61: Polymer Nanocomposites: Dynamics |
| 1050 | Effect of polymer-nanoparticle interaction strength on viscoelastic creep attenuation in polymer nanocomposites | Pressly, James; Yang, Entao; Bailey, Eric; Denby, Tia; Natarajan, Bharath; Riggleman, Robert; Winey, Karen | In this study, we examine the long-term creep behavior of a model nanocomposite system consisting of 13 and 52 nm diameter silica nanoparticles (NPs) dispersed in a matrix of 200 kg/mol poly(2-vinylpyridine) (P2VP). | Session 61: Polymer Nanocomposites: Dynamics |
| 1051 | Solvent induced phase behavior 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 coarsen the in-plane and out-of-plane surface patterns, to over 3 and 20 times respectively, by using a direct solvent immersion annealing (DIA) method. | Session 61: Polymer Nanocomposites: Dynamics |
| 1052 | Growth and dissolution of crystal nuclei in poly( L-lactic acid) (PLLA) in Tammann’s development method | Andrianov, Ruslan; Androsch, René; Mukhametzyanov, Timur; Schick, Christoph | Growth and dissolution of crystal nuclei in poly( L-lactic acid) (PLLA) in Tammann’s development method | Session 62: Polymer Crystals and Crystallization |
| 1053 | Flow-Induced Crystallization of Polymers during Multi-Axial Deformation | Nie, Cui; Sheng, Junfang; Chen, Wei; Zhao, Jingyun; Yu, Wancheng; Li, Liangbin | Considering the phenomenon of frustrating SIC for natural rubber during biaxial stretching, here we proposed a new model for SIC based on the results of theoretical calculation, which decouples the free energy contributions of chain orientation from that of conformational entropy reduction. | Session 62: Polymer Crystals and Crystallization |
| 1054 | Effect of Substrate Interaction on Thermodynamics of Prefreezing | Tariq, Muhammad; Dolynchuk, Oleksandr; Thurn-Albrecht, Thomas | 1 Phenomenological theory of prefreezing 2 predicts that the transition temperature Tmax depends primarily on the difference of the interfacial energies Δ γ = γsub,melt – ( γsub,cry + γcry,melt), whereas the minimum jump of thickness lmin at Tmax is controlled by the ratio ( γsub,cry + γcry,melt)/ γsub,melt. | Session 62: Polymer Crystals and Crystallization |
| 1055 | In Situ Grazing Incidence X-Ray Scattering For Monitoring Semi-Crystalline Polymer Dissolution, Recrystallization, and Morphology Mechanisms with Solvent Vapor Treatment | Bliesner, Samuel; Parker, Tara; Albert, Julie | Herein, we apply grazing incidence X-ray scattering techniques in situ to probe the mechanisms of polymer dissolution during solvent uptake and recrystallization behavior during solvent removal aiming to understand why we observe new morphologies in semicrystalline PCL thin films. | Session 62: Polymer Crystals and Crystallization |
| 1056 | Manipulation of Minority Block Crystallization in Asymmetric PEO-b-PCL Copolymers | VanHorn, Ryan; Ashley, Alex; Tower, Cole | Manipulation of Minority Block Crystallization in Asymmetric PEO-b-PCL Copolymers | Session 62: Polymer Crystals and Crystallization |
| 1057 | Effects of phase separation and interfaces on incompatible polymer crystallization | Zhang, Wenlin; Zou, Lingyi | We apply molecular dynamics (MD) simulations to investigate the roles of phase separation and interfaces in the crystallization of incompatible polymer blends. | Session 62: Polymer Crystals and Crystallization |
| 1058 | 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 62: Polymer Crystals and Crystallization |
| 1059 | Bowls, Vases and Goblets – Polymer and Nanocomposite Morphology Revealed by Optical Tomography | Yang, Shu-gui; Wei, Zhen-zhen; Ungar, Goran; Cseh, Liliana; Zeng, Xiangbing | Here we present first such images obtained by confocal microscopy using appropriate sample preparation and image processing. | Session 62: Polymer Crystals and Crystallization |
| 1060 | Polymer Crystallization at Curved Liquid/Liquid Interface | Staub, Mark; Li, Christopher | The methods commonly employed tend to provide particles that have simple morphology of spheres or cylinders that are inherently fluidic and dynamic due to the long chain nature of macromolecules. | Session 62: Polymer Crystals and Crystallization |
| 1061 | Effect of Polymorphism on Isothermal Crystallization Kinetics of Long-Spaced Precision Polyacetals | Alamo, Rufina; Zhang, Xiaoshi; Marxsen, Stephanie; Ortmann, Patrick; Mecking, Stefan | Effect of Polymorphism on Isothermal Crystallization Kinetics of Long-Spaced Precision Polyacetals | Session 62: Polymer Crystals and Crystallization |
| 1062 | Measuring Flow-Induced Crystallization Kinetics of Polyethylene after Processing | Kearns, Kenneth; Scherzer, Justin; Fielitz, Tom; Chyasnavichyus, Marius; Monaenkova, Daria; Moore, Jonathan; Nicholson, David; Andreev, Marat; Rutledge, Gregory | Here we will describe development of a new methodology whereby the effect of flow on crystallization kinetics in polyethylene can be determined after an article is formed. | Session 62: Polymer Crystals and Crystallization |
| 1063 | Thickness and Crystallinity Dependent Swelling of Poly(ethylene oxide)/Poly(methyl methacrylate) Blend Films | Wang, Shiping; Albert, Julie; Vogt, Bryan | In this study, we probed the amorphous phase of thin film immiscible blends of poly(methyl methacrylate) (PMMA) and semi-crystalline poly(ethylene oxide) (PEO) and investigated how blend composition and film thickness influence film swelling under methyl ethyl ketone (MEK) vapor atmosphere. | Session 62: Polymer Crystals and Crystallization |
| 1064 | Evaluation The Hydrogen Bonding in Stereocomplex Poly(lactic acid) by Terahertz Spectroscopy | Hirata, Junya | Here, we report on the terahertz spectroscopic investigation of the hydrogen bond formation between the two enantiomeric molecular chains in the stereocomplex (sc) PLA [1]. | Session 62: Polymer Crystals and Crystallization |
| 1065 | Crystallization of molecular bottlebrush crystallization: symmetry breaking via polymer chain overcrowding | Li, Christopher; Qi, Hao; Wilk, Jeffrey; Staub, Mark; Zhao, Bin | In this talk, we discuss the crystallization behavior of crystalline molecular bottlebrush (mBB) polymers. | Session 62: Polymer Crystals and Crystallization |
| 1066 | Flow Induced Crystallization: Insights from Molecular Simulation | Rutledge, Gregory; Nicholson, David; Yi, Peng | 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 62: Polymer Crystals and Crystallization |
| 1067 | Simulation Study of Crystallization and Glass Transition of Polymers Interacting with the Square-Well Potential | Herranz, Miguel; Karayiannis, Nikos; Foteinopoulou, Katerina; Laso, Manuel | We employ Monte Carlo simulations [1] to study the phase behavior of linear, freely jointed chains whose spherical monomers interact through the square well potential [2]. | Session 62: Polymer Crystals and Crystallization |
| 1068 | GPU-accelerated Wang-Landau Simulation of Polymer Crystallization | Kawak, Pierre; Banks, Dakota; Tree, Douglas | We will discuss the challenges with this approach and our recent progress. | Session 62: Polymer Crystals and Crystallization |
| 1069 | Long term evolution of morphology, melting, and crystal-crystal transitions facilitated by dynamic bond exchange in ethylene dynamic networks | Soman, Bhaskar; Evans, Christopher | Long term evolution of morphology, melting, and crystal-crystal transitions facilitated by dynamic bond exchange in ethylene dynamic networks | Session 62: Polymer Crystals and Crystallization |
| 1070 | Crystallization Kinetics of Polyamide 66 Blends | Zhang, Xiaoshi; Mendis, Gamini; Buzinkai, John; Rhodes, Alicya | Crystallization Kinetics of Polyamide 66 Blends | Session 62: Polymer Crystals and Crystallization |
| 1071 | 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 lmin at Tmax. | Session 62: Polymer Crystals and Crystallization |
| 1072 | Molecular Dynamics, Phase Transition, and Structural Organization in Configurationally and Conformationally Disordered Polymer Crystal | Kafle, Navin; Miyoshi, Toshikazu | We report a new class of structural disorder, “ configurational disorder coupled with conformational flexibility ( CDCF)” in polymer crystal. | Session 62: Polymer Crystals and Crystallization |
| 1073 | Unlayered–Layered Crystal Transition in Long-Spaced Aliphatic Polyesters | Marxsen, Stephanie; Häußler, Manuel; Mecking, Stefan; Alamo, Rufina | We report the first known instance where layered crystal formation is bypassed by rapid quenching. | Session 62: Polymer Crystals and Crystallization |
| 1074 | Cold Crystallization in Poly(lactic acid) (PLA) Induced by Various Forms of Pre-deformation | Smith, Travis; Wang, Shi-Qing | In a prior publication 1 we have shown how brittle PLA can be made ductile by uniaxial melt extension and resistant to heat well above its T g of 60 oC. | Session 62: Polymer Crystals and Crystallization |
| 1075 | Paradigm in the growth kinetic theories of lamellar polymer crystals | Hu, Wenbing | Paradigm in the growth kinetic theories of lamellar polymer crystals | Session 62: Polymer Crystals and Crystallization |
| 1076 | Evaporation and deposition of perovskite multisolvent nanoinks | Jeong, Woojun; OH, GUN; Kim, Hyo Eun; Weon, Byung Mook | To understand complexity in evaporation and deposition of perovskite multisolvent nanoinks, we suggest a new physical model that quite well works in perovskite multisolvent nanoinks. | Session 62: Polymer Crystals and Crystallization |
| 1077 | Entropy Driven Ostwald’s Stage Rule and Ripening in Polymer Crystallization | Laso, Manuel; Herranz, Miguel; Benito, Javier; Foteinopoulou, Katerina; Karayiannis, Nikos | We present results on the spontaneous crystallization of a very extensive system (54 chains of 1000 hard sphere monomers) by means of a suite of Monte Carlo (MC) moves. | Session 62: Polymer Crystals and Crystallization |
| 1078 | Chain Conformations in Model Polymer-Grafted Nanoparticle Monolayers | Liesen, Nicholas; Hall, Lisa | Chain Conformations in Model Polymer-Grafted Nanoparticle Monolayers | Session 63: Polymer Nanocomposites: Structure and Property |
| 1079 | Effects of Chain Length on the Structure and Dynamics of Semi-Dilute Nanoparticle-Polymer Composites | Liu, Ari; Emamy, Hamed; Douglas, Jack; Starr, Francis | We use molecular dynamics simulations to study how chain length affects the structure and dynamics of polymer-nanoparticle (NP) composites at a semi-dilute NP concentration with an ideal dispersion of NPs. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1080 | Nanoscale Structure-Property Relations in Self-Regulated Polymer Grafted Nanoparticle Structures | McClimon, John; Maguire, Shawn; Bilchak, Connor; Keller, Austin; Fulco, Sage; Turner, Kevin; Composto, Russell; Carpick, Robert | Using a combination of atomic force microscopy (AFM), AFM nanoindentation, and optical microscopy, we show that these self-regulated structures lead to nanocomposites with increased modulus, hardness, and thermal stability compared to analogous PMMA/SAN blends. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1081 | Strain hardening from deformation-induced nanoparticle-nanoparticle interaction of polymer nanocomposites | Sun, Ruikun; Melton, Matthew; Zuo, Xiaobing; Cheng, Shiwang | In this work, we investigate the roles of external deformation on the nanoparticle-nanoparticle interactions through a combination of small-angle x-ray scattering and rheology. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1082 | Enhancing the Fracture Toughness of Polymer-Infiltrated Nanoparticle Films via Polymer Bridging and Entanglement | Qiang, Yiwei; Lee, Daeyeon; Turner, Kevin | In the present work, a thin-film fracture testing method based on the double cantilever beam (DCB) specimen is developed and used to investigate the fracture properties of polymer-infiltrated nanoparticle films. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1083 | Molecular Dynamics Simulations of Polymer-Grafted Nanoparticle Monolayers | Hall, Lisa | Here, we use coarse-grained molecular dynamics (MD) simulations to show how these factors interact to set the interparticle spacing, interpenetration and entanglements of polymers on adjacent particles, and mechanical properties of PGN monolayers. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1084 | Correlating Polymer Morphology to Rheological Properties in PEO / SiO2 nanocomposites | Chrissopoulou, Kiriaki; Kogchylakis, Sokratis; Anastasiadis, Spiros | In this work we report on the rheological behavior of series of poly(ethylene oxide) / silica, PEO/SiO 2, nanocomposites through oscillatory shear rheology measurements. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1085 | Using in situ polymerizations to create polymer/inorganic nanoparticle hybrid materials | LaNasa, Jacob; Hickey, Robert | Using in situ polymerizations to create polymer/inorganic nanoparticle hybrid materials | Session 63: Polymer Nanocomposites: Structure and Property |
| 1086 | Structure of Polymer-Grafted Nanoparticle Melts | Midya, Jiarul; Rubinstein, Michael; Kumar, Sanat; Nikoubashman, Arash | To better understand this partitioning, we develop a two-layer model, representing the grafted polymer around a NP by spherical dry and interpenetration layers. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1087 | Strong Preparation Effects on the Morphology and Gas Transport Properties of Polymer Grafted Nanoparticle Membranes | Chan, Sophia; Jhalaria, Mayank; Huang, Yucheng; Benicewicz, Brian; Fukuto, Masafumi; Li, Ruipeng; Kumar, Sanat | In an attempt to remedy the incompatibility, we chemically grafted the polymer to the nanoparticle and found these polymer grafted nanoparticle (PGN) films yielded significantly high enhancements of gas permeabilities relative to that of the neat polymer. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1088 | Direct visualization of the nanoparticle rearrangement of polymer nanocomposites under deformation by scanning electron microscopy | Melton, Matthew; Cheng, Shiwang | In this work, the roles of the external deformation on the spatial rearrangement of individual particles or nanoparticle clusters will be mapped out through a combination of scanning electron microscopy and rheology. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1089 | Mesostructured Metal Superconductors via Block Copolymer Nanocomposites: Quantum Metamaterials from Soft Matter | Thedford, R. Paxton; Gruner, Sol; Wiesner, Ulrich | Here we will report on a versatile approach to mesostructured metal superconductors via block copolymer nanocomposite formation. | Session 63: Polymer Nanocomposites: Structure and Property |
| 1090 | Coordinated experimental analysis of swollen polymer networks shows linear synthesis-swelling correlations and reveals fundamental inconsistencies in theoretical equations | Richbourg, Nathan; Peppas, Nikolaos | Here, we show that equilibrium swelling theory overestimates the importance of the equilibrium-swollen polymer volume fraction. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1091 | Bridging Dynamic Regimes of Segmental Relaxation and Center-of-Mass Diffusion in Associative Protein Hydrogels | Rao, Ameya; Yao, Helen; Olsen, Bradley | Bridging Dynamic Regimes of Segmental Relaxation and Center-of-Mass Diffusion in Associative Protein Hydrogels | Session 64: Polymeric Networks, Elastomers and Gels |
| 1092 | Double-twist elastomers: mechanical untwisting and chiral buckling | Rutenberg, Andrew; Kreplak, Laurent; Leighton, Matthew | Motivated by collagen fibrils, we adapt the theory of nematic elastomers to cross-linked double-twist cylinders. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1093 | Development of non-invasive shear wave elastography to assess the mechanical and fracture behavior of tough model gels | Le Blay, Heiva; Deffieux, Thomas; Tanter, Mickaël; Marcellan, Alba | This approach gives new insights into soft matter fracture. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1094 | Mechanochemistry as a Tool to Study Cavitation in Multiple-Network Elastomers | Sanoja, Gabriel; Morelle, Xavier; Castagnet, Sylvie; Creton, Costantino | Using this tool, we demonstrate that cavity expansion is an irreversible fracture process that occurs via nucleation and propagation of randomly oriented penny-shape cracks. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1095 | 3D printable ultrasoft solvent-free elastomers | Nian, Shifeng; Zhu, Jinchang; Zhang, Haozhe; Gong, Zihao; Freychet, Guillaume; Zhernenkov, Mikhail; Xu, Baoxing; Cai, Liheng | Here, we report 3D printable ultrasoft elastomers by exploiting the self-assembly of a responsive bottlebrush-based triblock copolymer. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1096 | Network Analysis of Triblock Copolymer Gels via Quasi-Static Tensile Experiments | Mineart, Kenneth | Quasi-static tensile stress-strain data modeled using slip-tube network (STN) theory, on the other hand, enable modulus contributions from both the crosslinked network, Gc, and midblock entanglements, Ge, to be deciphered. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1097 | Reinforced elastomers for dynamic applications: from non-linearities to Physics understanding | Grimaldi d’Esdra, Gaétan; Montes, Hélène; Lequeux, François | We specially focused on thebehaviour of one bridge with stress-softening and strain hardening. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1098 | Predicting the flow of polymers under melt processing: from reaction kinetics to viscoelasticity | Zou, Weizhong; Tupper, Amber; Rebello, Nathan; Ranasinghe, Duminda; Green, William; Olsen, Bradley; Couch, Christopher | Using both computational chemistry and model compound studies, a mechanistic model for radical-mediated grafting of vinyl silane monomers by melt phase processing was developed. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1099 | Studying the Effect of Crosslinker Concentration on Structure, Dynamics, and Volume Phase Transition of Microgels. | Streletzky, Kiril; Scherer, Andrew; Tietjen, Samantha; Freeman, Krista | Studying the Effect of Crosslinker Concentration on Structure, Dynamics, and Volume Phase Transition of Microgels. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1100 | Theory of Side-chain Liquid Crystal Elastomers | Liu, Luofu; Wang, Rui | Here, we develop a self-consistent field theory of side-chain liquid crystal elastomers by combining the affine network theory for polymer networks and freely-jointed chain model for liquid crystal polymers. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1101 | Influence of Local Environment on Water Properties Within Physically Crosslinked Amphiphilic Copolymer Hydrogels | Sepulveda-Medina, Pablo; Vogt, Bryan | Influence of Local Environment on Water Properties Within Physically Crosslinked Amphiphilic Copolymer Hydrogels | Session 64: Polymeric Networks, Elastomers and Gels |
| 1102 | Dynamics of Anisotropic Nanoparticles Within Model Homogenous Hydrogels | Rose, Katie; Gotogsi, Natalie; Galarraga, Jonathan; Burdick, Jason; Murray, Christopher; Lee, Daeyeon; Composto, Russell | In this study, the diameter of the rods is comparable to the final mesh size, but the lengths of the rods are larger than the final mesh size. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1103 | Analysis of the Gel Point of Polymer Model Networks by Computer Simulations | Lang, Michael; Müller, Toni | Analysis of the Gel Point of Polymer Model Networks by Computer Simulations | Session 64: Polymeric Networks, Elastomers and Gels |
| 1104 | Capturing the transient microstructure of poly(styrene)-poly(isoprene)-poly(styrene) gel subjected to temperature and large deformations | Badani Prado, Rosa Maria; Mishra, Satish; Burghardt, Wesley; Kundu, Santanu | We present the real-time change in the microstructure of 10 and 20% (w/w) of poly(styrene)-poly(isoprene)-poly(styrene) [PS-PI-PS] gel in mineral oil, captured using small-angle X-ray scattering experiments and compared with shear rheology experiments. | Session 64: Polymeric Networks, Elastomers and Gels |
| 1105 | Jamming with Tunable Roughness | Brito, Carolina; Ikeda, Harukuni; Wyart, Matthieu; Zamponi, Francesco; Urbani, Pierfrancesco | In this talk I will present some advances in the understanding of the scaling properties of the non-spherical particles at the jamming point and a model where friction can be explored by tunning particles roughness. | Session 65: Universal Properties at the Jamming Transition: Mean Field Approaches to Glasses and Granular Materials |
| 1106 | Critical jammed phase of linear soft spheres | Franz, Silvio | We perform numerical simulations to measure their values and show that, while they coincide, within numerical precision, with the critical exponents appearing at jamming. | Session 65: Universal Properties at the Jamming Transition: Mean Field Approaches to Glasses and Granular Materials |
| 1107 | Emergence of elasticity In amorphous solids: a gauge theory | Chakraborty, Bulbul | I will present results from experiments and numerical simulations that corroborate our theoretical results broadly, present experimental evidence indicating that force chains in granular media are sub-dimensional excitations of amorphous elasticity similar to fractons, and address the long-standing problem of stress transmission in "sandpiles" using the gauge-theory framework. | Session 65: Universal Properties at the Jamming Transition: Mean Field Approaches to Glasses and Granular Materials |
| 1108 | Elasticity of disordered elastic networks: Jamming, rigidity percolation and beyond | Liarte, Danilo; Chowdhury, Debanjan; Cohen, Itai; Lubensky, Tom; Mao, Xiaoming; Schwen, Eric; Sethna, James; Stenull, Olaf; Thornton, Stephen | Here I will present results of a new theory [2] of the jamming transition that is both analytically tractable and that clarifies the relation between jamming and rigidity percolation. | Session 65: Universal Properties at the Jamming Transition: Mean Field Approaches to Glasses and Granular Materials |
| 1109 | Criticality and Scaling around the Jamming Transition | Goodrich, Carl | I will show how our understanding of these behaviors can be unified through a Widow-like scaling ansatz. | Session 65: Universal Properties at the Jamming Transition: Mean Field Approaches to Glasses and Granular Materials |
| 1110 | Rigid cyclic chains in solution: cyclic amylose carbamate derivatives | Terao, Ken | The cyclic chains have lyotropic liquid crystallinity for which the phase diagram of isotropic and nematic phases were explained by a modified scaled particle theory when we assume some specific conformation in the nematic phase. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1111 | Directly Visualizing Conformations of Bottlebrush Polymers in Bulk Films using Super-Resolution Optical Microscopy | Chan, Jonathan; Kordon, Avram; Zhang, Ruimeng; Qiang, Zhe; Wang, Muzhou | So far, studies have investigated conformations for single chains on surfaces and in dilute solutions, but few studies have investigated conformations in bulk environments. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1112 | Bottlebrushes and Combs With Bimodal Distribution of the Side Chains: Scattering Function | Liang, Heyi; Tian, Yuan; Starvaggi, Haley; Dobrynin, Andrey | We use a combination of the Random Phase Approximation (RPA) calculations and coarse-grained molecular dynamics (CGMD) simulations to study scattering from melts of graft polymers with bimodal distribution of the side chains. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1113 | Synthesis, Characterization and Behavior of Cationic Dendrimer-PDMS Hybrids | Marks, Monica; Gutekunst, Will; Kalaitzidou, Kyriaki | Here, we report on the synthesis and generationally dependent antimicrobial activity of novel bis-MPA type polyester dendrons containing quaternary ammonium cation (QAC) functionality at the terminal ends. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1114 | AFM Force Spectroscopy Measurements of Soft, Dendritic Phytoglycogen Nanoparticles | Baylis, Benjamin; Shelton, Erin; Dutcher, John | We have used atomic force microscopy (AFM) force spectroscopy to collect high resolution force-distance maps of a large number of individual phytoglycogen nanoparticles, providing unique insights into the morphology and mechanical stiffness of the nanoparticles. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1115 | Hairy Particle Morphology of Dendritic Phytoglycogen Nanoparticles Revealed by Hydrophobic Modification | Simmons, John; Nickels, Jonathan; Grossutti, Michael; Shamana, Hurmiz; Stanley, Christopher; Katsaras, John; Dutcher, John | We used small angle neutron scattering (SANS) of dilute dispersions of native phytoglycogen nanoparticles in mixtures of D 2O and H 2O to reveal the presence of hairy chains on the surface of the particles. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1116 | Hydrogen-bonded assembly of star and linear polymers. | Aliakseyeu, Aliaksei; Sukhishvili, Svetlana | We report on the effect of the molecular architecture of poly(ethylene oxide), PEO on its hydrogen-bonding assembly with poly(methacrylic acid (PMAA). | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1117 | Star polymer films for superior impact resistance | Giuntoli, Andrea; Hansoge, Nitin; Keten, Sinan | We present a study on the resistance to ballistic impact of thin polymer films using coarse-grained molecular dynamics simulations, investigating melts of star polymers. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1118 | Bottlebrushes and Combs With Bimodal Distribution of the Side Chains: Diagram of States | Tian, Yuan; Starvaggi, Haley; Liang, Heyi; Dobrynin, Andrey | Using this representation, we extend the concept of the crowding parameter Φ, describing the degree of mutual interpenetration of the side chains belonging to neighboring macromolecules, and apply it to derive b 1 as a function of Φ. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1119 | Universal SCFT phase behavior in conformationally asymmetric linear, comb, and bottlebrush block copolymers | Vigil, Daniel; Sun, Dan; Quah, Timothy; Lequieu, Joshua; Delaney, Kris; Fredrickson, Glenn | Using self-consistent field theory, we study the stability window of the A15 and σ phases for comb block copolymers with identical bond lengths and linear polymers with asymmetric segment lengths. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1120 | Tuning Adsorption using Entropy to Alter Structure, Diffusion, and Swelling in Thin Polymer Films | Akgun, Bulent; Kirevliyasi, M. Gizem; Caglayan, Ayse; Uhrig, David; Hong, Kunlun; Yuan, Guangcui; Satija, Sushil | We have determined the effects of number of arms, arm molecular weight as well as film thickness and molecular weight on the adsorption using well-defined linear and star polystyrene (PS) by ellipsometry and X-ray reflectivity. | Session 66: Polymers with Special Architectures: From Molecular Design to Physical Properties |
| 1121 | Capillary-driven indentation of a small particle into a soft, oil-coated surface | Glover, Justin; Pham, Jonathan | A simple model that balances the capillary force of the oil layer with the elastic and surface forces from the substrate is proposed to predict the position of the particle. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1122 | Lubricated hydrodynamic interactions between a hard spherical indenter and a poroelastic nanolayer | Kopecz-Muller, Caroline; Bertin, Vincent; Abdorahim, Marjan; Tran, Yvette; Tabeling, Patrick; Raphael, Elie; McGraw, Joshua; Salez, Thomas | Here, we establish theoretical models and perform numerical simulations for the particle motion. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1123 | Relaxation and Recovery in Hydrogel Friction on Smooth Surfaces | Burton, Justin | Here we examine this regime in closer detail for PAA hydrogels. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1124 | Elastohydrodynamic interactions between a spherical particle and a soft boundary. | Bertin, Vincent; Zhang, Zaicheng; Arshad, Muhammad; Maali, Abdelhamid; Raphael, Elie; Salez, Thomas | In particular, we present experimental measurements at the nanoscale of the elastohydrodynamic lift force, using an Atomic Force Microscope in quantitative agreement with the derived asymptotic theory. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1125 | How osmotic pressure governs surface structures and sliding friction on swollen crosslinked hydrogels | Johnson, Christopher; Reale, Erik; Dunn, Alison | Here I present two vignettes illustrating this connection. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1126 | The slippery slope of frictional layered structures | Poincloux, Samuel; De Geus, Tom; Wyart, Matthieu; Reis, Pedro | Specifically, we investigate a system of stacked plates with frictional interfaces forced to slide simultaneously. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1127 | Soft and rough: Tribology of naturally and artificially rough hydrogels | Rudge, Raisa; Scholten, Elke; Dijksman, Joshua | We use a 3D-printed tribometer and measure the friction coefficient of 4 hydrogels: polyacrylamide, physically and chemically cross-linked gelatin, and agar. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1128 | Formation of Pickering Emulsions Using Nanodiamonds | Farias, Barbara; Jani, Pallav; 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 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1129 | Dynamics of Confined Microgel Liquids between Compliant 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 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1130 | Influence of bending patterns on soft tribology | Serfass, Christopher; Peng, Yunhu; Hsiao, Lilian | To explain this phenomenon, we employ cantilever beam theory and empirical statistical regression. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1131 | Viscoelastic Lubrication of Model Emulsions in Shear-Thinning Matrix | Lim, Ming Yao; Xu, Yuan; Shewan, Heather; Stokes, Jason | We studied soft lubrication of model emulsions with oil droplets dispersed in non-Newtonian hydrocolloid solutions designed to be iso-viscous at low- and high-shear rates respectively. | Session 67: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions |
| 1132 | Advanced Dielectric Polymeric Materials with Rational Design of Nano-Morphologies | Chen, Xin; Zhang, Qiyan; Zhang, Tian; Zhang, Qiming | In this talk, we will present several strategies to modify the nanostructures for developing polymer dielectrics with outstanding performance. | Session 68: Structure and Dynamics of Charged Polymers |
| 1133 | The nanostructure and ion dynamics of novel hydrocarbon ionene AEMs via scattering and simulation | Schibli, Eric; Holdcroft, Steven; Frisken, Barbara | We have investigated a promising series of fully aromatic hydrocarbon ionene anion-exchange membranes (AEMs) utilizing a combination of X-ray scattering and molecular dynamics simulations to elucidate the morphology of these materials and have utilized molecular dynamics to investigate the role of cation and polymer architecture in ion transport dynamics. | Session 68: Structure and Dynamics of Charged Polymers |
| 1134 | Charging Dynamics and Structure of Ionic Liquids in Nanoporous Supercapacitors | Breitsprecher, Konrad; Holm, Christian; Kondrat, Svyatoslav | Charging Dynamics and Structure of Ionic Liquids in Nanoporous Supercapacitors | Session 68: Structure and Dynamics of Charged Polymers |
| 1135 | Intra-chain electrostatic correlations govern charge regulation of weakly dissociating polyelectrolytes | Ghasemi, Mohsen; Larson, Ronald | Here, we develop a detailed model that combines an acid-base equilibrium with a random phase approximation (RPA) of electrostatic correlations for a solution containing weak polyacids. | Session 68: Structure and Dynamics of Charged Polymers |
| 1136 | Field Theory Description of Polyelectrolyte-Surfactant Coacervate Phase Behavior | Madinya, Jason; Sing, Charles | In this work we present a field theoretic calculation(1) for modeling phase separation in charged polymer and surfactant solutions, where we treat micelle surface sites as permanent sites interacting with polymer density fields. | Session 68: Structure and Dynamics of Charged Polymers |
| 1137 | Effect of Added Salt on Disordered Poly(ethylene oxide)-Block-Poly(methyl methacrylate) Copolymer Electrolytes | Shah, Neel; Dadashi-Silab, Sajjad; Galluzzo, Michael; Chakraborty, Saheli; Loo, Whitney; Matyjaszewski, Krzysztof; Balsara, Nitash | We studied the effect of salt addition on a diblock copolymer system with a negative Flory-Huggins interaction parameter, χ, indicative of attractive interactions between the two blocks. | Session 68: Structure and Dynamics of Charged Polymers |
| 1138 | Conformation and aggregation of polyelectrolyte in poor solvents | Duan, Chao; Wang, Rui | Here, we develop a theory by systematically including the electrostatic interactions into the self-consistent field theory for polymers to study the single-chain conformation and multi-chain aggregation of PE in poor solvents. | Session 68: Structure and Dynamics of Charged Polymers |
| 1139 | A computational approach to characterize gating in ion channels | Guardiani, Carlo; Costa, Flavio; Giacomello, Alberto | Since this process occurs on a timescale not reachable by MD simulations, we employed Targeted MD, a technique that imposing a bias on RMSD, steers the molecule between fixed end states. | Session 68: Structure and Dynamics of Charged Polymers |
| 1140 | Controlling the Properties of Ion Containing Polymers, Hydrogels and Membranes | Olvera De La Cruz, Monica | Here we explore the physical properties, including structure, ion transport and reconfigurability of ion-containing polymers, gels and membranes in bulk and confinement for ionic devices utilization. | Session 68: Structure and Dynamics of Charged Polymers |
| 1141 | Self Assembly of Block Copolymers in Ionic-liquid Cured Epoxy | Liu, Deborah; Krogstad, Daniel | In this work, the ability of ionic liquids to act as both a structure directing and curing agent in epoxy/block copolymer (BCP) blends is discussed. | Session 68: Structure and Dynamics of Charged Polymers |
| 1142 | Effect of Cluster Cohesion on Dynamics of Ionic Polymers in Solutions: MD Simulations Studies | Kosgallana, Chathurika; Grest, Gary; Perahia, Dvora | We find that the dynamics of the polymer that is constrained on the length scale of the ionic cluster in toluene is enhanced as tiny quantities of ethanol are added. | Session 68: Structure and Dynamics of Charged Polymers |
| 1143 | A Coarse-grained Approach to Understanding the Behavior of Polyelectrolyte Solutions | Kaur, Supreet; Yethiraj, Arun | We present a coarse-grained approach to modeling polyelectrolyte solutions, with a goal of studying large systems with adequate chemical detail, including explicit solvent. | Session 68: Structure and Dynamics of Charged Polymers |
| 1144 | Polyelectrolyte gels in salt solutions: a computational study | Wang, Zilu; Jacobs, Michael; Dobrynin, Andrey | To understand the factors influencing the PG swelling, we performed coarse-grained molecular dynamics simulations of PGs in salt solutions. | Session 68: Structure and Dynamics of Charged Polymers |
| 1145 | Building a Physical Learning Network | Dillavou, Sam; Stern, Menachem; Liu, Andrea; Durian, Douglas | Here we build a physical system – an electrical network of variable resistors – capable of learning a range of tasks: a physical learning network. | Session 69: Programmable Matter |
| 1146 | Generating allosteric response by in-situ pruning of disordered networks | Pashine, Nidhi; Nagel, Sidney | By measuring the stresses in the bonds under various applied strains, we can identify which ones to prune in order to achieve a specific desired response. | Session 69: Programmable Matter |
| 1147 | Branching out into computation: using singularities to design mechanical logic* | Berry, Michelle; Limberg, David; Kim, Yong-Jae; Hayward, Ryan; Santangelo, Christian | To better understand the role of the finite elasticity seen in our experimental logic gates, we introduce simple computational models to capture experiments and explore their effect on the functionality of mechanical logic. | Session 69: Programmable Matter |
| 1148 | Smooth triaxial weaving with naturally curved ribbons | Baek, Changyeob; Martin, Alison; Chen, Tian; Poincloux, Samuel; Reis, Pedro | Here, we demonstrate smooth gradation of curvature in the woven structures by prescribing in-plane curvatures to the ribbons. | Session 69: Programmable Matter |
| 1149 | DNA-Polylysine Complex Coacervates | Nguyen, Anna; Saleh, Omar | Here, we test the ability of a variety of nucleic acid structures to form coacervates by complexing with poly-l-lysine, and we show that more flexible nucleic acid structures are less prone to coacervation at higher salt conditions. | Session 69: Programmable Matter |
| 1150 | From open to close-packed tilings and beyond – tuning the assemblies of patchy platelets with patch size and placement | Karner, Carina; Müller, Felix; Bianchi, Emanuela | In this computational work [1,2] we present how the interplay between the shape-anisotropy of the colloidal platelets and the placement of the patches on the platelet edge can yield surface tilings with tuneable properties, from close-packed to monolayers with pores of tuneable shapes and sizes. | Session 69: Programmable Matter |
| 1151 | Multistable structures with collocated sensing and mechanologic | Arrieta, Andres; Udani, Janav | We present a class of multistable metastructures that display history-dependent deformation. | Session 69: Programmable Matter |
| 1152 | Disordered topological mechanical metamaterials | Stanifer, Ethan; Mao, Xiaoming | In this talk, we will present our investigation on mechanisms for encoding topological material properties into disordered materials via asymmetrical material preparation. | Session 69: Programmable Matter |
| 1153 | Propagation of Information through Origami Folding: A Graph-Theoretic Approach | Grasinger, Matthew; Yannie, Hannah; Gillman, Andrew; Buskohl, Philip | To identify the network embedding, we use numerical optimization and minimum energy path methods. | Session 69: Programmable Matter |
| 1154 | Diverse actuation of light-responsive LCE’s | Waters, James; Balazs, Anna | We make use of a finite element model to capture the interplay of the time-varying light transmission through the material in conjunction with the illumination or shadowing of different areas of three-dimensional molded micro structures as they twist and bend. | Session 69: Programmable Matter |
| 1155 | Active elastocapillarity | Binysh, Jack; Souslov, Anton; Wilks, Thomas | Here, we develop a continuum theory that describes an active surface wrapped around a passive soft solid. | Session 69: Programmable Matter |
| 1156 | How to program the mechanics of frustrated and floppy metamaterials | Coulais, Corentin | In this talk, I will discuss two complementary routes to achieve programmable mechanical tasks: (i) in frustrated metamaterials: I will discuss how topological solitons can be manipulated to achieve non-abelian mechanics; (ii) in floppy metamaterials: I will discuss how dissipation and gain can be used to control deformation pathways. | Session 69: Programmable Matter |
| 1157 | Bifurcation and Nonlinear Analysis of 3D Programmable Formations in Thermocapillary Modulated Nanofilms | Chang, Yi Hua; Troian, Sandra | Here we present a bifurcation and nonlinear analysis of thermocapillary modulated liquid nanofilms prone to an intrinsic 3D instability triggered by noise. | Session 69: Programmable Matter |
| 1158 | Decision making behaviors in a brainless organism (Physarum polycephalum) can emerge from self-organized physical interactions within a single cell. | Haque, Abid; Graham, Jason; Edwards, Andrew; Ray, Subash; Garnier, Simon | In this study, we use a brainless unicellular protist Physarum polycephalum (slime mold) to examine the mechanisms it employs to “choose” one food source over another. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1159 | Cooperatively enhanced reactivity and "stabilitaxis" of dissociating oligomeric proteins | Agudo-Canalejo, Jaime; Illien, Pierre; Golestanian, Ramin | By studying the generic spatial transport properties of such proteins, we investigate here whether their ability to reversibly associate and dissociate may confer them a functional advantage with respect to non-dissociating proteins [1]. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1160 | Uni- and bidirectional forcing in Dictyostelium discoideum streaming | Bull, Abby; Mosher, Molly; Hourwitz, Matt; Fourkas, John; Losert, Wolfgang | Here we investigate the combination of chemical and topographic guidance cues. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1161 | Geometric signatures of tissue surface tension in a three-dimensional model of confluent tissue | Sahu, Preeti; Schwarz, J; Manning, M Lisa | To uncover the underlying physical mechanisms driving these geometric features, we develop two simple toy models that identify an energy competition between bulk cell shapes and two-tissue interface area. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1162 | The Physical Basis of Curvaure Sensing by Septins | Shi, Wenzheng; Cannon, Kevin; Gladfelter, Amy; Nazockdast, Ehssan | Here we use a combination of biophysical modeling and simulations, single molecule imaging and scanning electron microscopy to study the interplay between membrane’s curvature and the different processes involved in septin assembly, including septins’ membrane association/dissociation, diffusion and polymerization rates. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1163 | Unraveling cytoplasmic streaming using a coarse-grained model of microtubule hydrodynamics | Stein, David; De Canio, Gabriele; Lauga, Eric; Goldstein, Raymond; Shelley, Michael | Using a coarse-grained model for the hydrodynamics of ordered fibers, we show that sufficiently dense microtubule arrays, forced only by molecular motors transporting cargo, undergo a "swirling transition" that is fundamentally different than the buckling transition which leads to the flapping motion of isolated filaments. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1164 | Chimeras as a way to model anatomical reentry in cardiac models | Welsh, Andrea; Fenton, Flavio | We present an extension to a FHN system with purely local coupling that models waves and unresponsive cells and explore the rich dynamics that result. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1165 | Irwin Oppenheim Award (2021): Design of conditions for self-replication | Sarkar, Sumantra | In this talk, I shall report progress in addressing this need. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1166 | Self-organization in composite biopolymer liquid crystals | Weirich, Kimberly | Here, we discuss composite biological liquid crystals, formed form filaments mixed with biological polymers of different rigidities. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1167 | How motors shape their roads: self-organisation in dynamic filament networks | Striebel, Moritz; Brauns, Fridtjof; Frey, Erwin | Here we propose a microscopic model for the interplay between the spatial microtubule network architecture and molecular motors that control filament length by catalysing their depolymerization. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1168 | Interacting associative memory networks as a model for tissue self-organization | Smart, Matthew; Zilman, Anton | To capture cell-cell interactions we propose to model interacting cells using a lattice of interacting Hopfield networks. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1169 | Designing the Morphology of Separated Phases in Multicomponent Liquid Mixtures | Kosmrlj, Andrej; Mao, Sheng; Chakraverti-Wuerthwein, Milena; Gaudio, Hunter | To address this issue, we developed novel algorithms for constructing phase diagrams and for predicting the morphology of separated phases. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1170 | Soft nanotubes confining adhensive elastic nanoparticles | Wu, Zeming | The aim of this work is to theoretically analyze the interaction between soft nanotubes with various membrane tension and confined nanoparticles with different bending rigidities, and covering the cases of a single particle and multiple particles of spatial periodicity. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1171 | Dielectrophoresis characterization of Neuroblastoma cells | Rikhtehgaran, Samaneh; Mosavati, Babak; Wille, Luc; Wei, Jianning; Du, E | This work presents a dielectrophoresis-based method for a label-free noninvasive characterization of neuroblastoma cells. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1172 | Synchronization and noise in arrays of hydrodynamically coupled cilia | Solovev, Anton | Past research proposed hydrodynamic coupling as a mechanism of synchronization, yet if such synchronization is stable in the presence of noise (corresponding to active fluctuations of cilia beating) has been addressed only for n=2 cilia [2], while the question of multi-stable synchronization in cilia carpets ( n>>1) remains open. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1173 | Sensing Cell Shape at the Micron Scale with Reaction-Diffusion | Singh, Amit; Camley, Brian | We simulate wave-pinning on a curved surface and show that high-activity domains migrate to peaks and troughs of the surface. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1174 | Nanofluidic Device for Measuring the Surface Charge of Extracellular Vesicles via a Tunable Electrostatic Landscape | Isaac Hosseini, Seyed Imman; Liu, Zezhou; Reisner, Walter; Mahshid, Sara | Here, we propose a nanofluidic device to perform simultaneous size and charge measurement of EVs. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1175 | Delay-induced transitions in swarmalator clusters | Blum, Nicholas; O’Keeffee, Kevin; Kogan, Oleg | We investigate the role of delay in the collective dynamics of swarmalators introduced recently by O’Keeffe, Hong, and Strogatz. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1176 | Numerical simulation of dielectrophoretic behavior of neuroblastoma cells | Mosavati, Babak; Rikhtehgaran, Samaneh; Du, E; Wei, Jianning | This work presents a numerical simulation of neuroblastoma cell DEP using the finite element method. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1177 | Inducing Integer Charge Topological Defects in Cell Monolayers | Endresen, Kirsten; Kim, MinSu; Serra, Francesca | We identify two different cell configurations near topological defects with azimuthal symmetry, where cells are able to change not only their alignment, but also their shape. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1178 | 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 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1179 | Physics-based modeling of whole-cell function: colloidal fundamentals to life-essential processes | Zia, Roseanna; Endy, Drew; Maheshwari, Akshay; Gonzalez Gonzalez, Emma del Carmen; Sunol, Alp | We showed that Brownian motion is essential but insufficient to recover experimentally measured elongation rates; we proposed other colloidal physics mechanisms that close the gap. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1180 | Physical scaling of size and shape in an early diverging animal | Vyas, Pranav; Bull, Matthew; Li, Hongquan; Prakash, Manu | We utilize high-throughput scanning microscopy to collect long term temporal datasets on the growth trajectories of individual organisms to identify scaling laws governing measurable changes in shape metrics with size. | Session 70: Self-Organization in Biological Systems: Subcellular to Tissue Scales |
| 1181 | Emergent colloidal currents generated via exchange dynamics in a broken dimer state | Massana Cid, Helena; Ortiz ambriz, Antonio; Tierno, Pietro | In this talk I will describe a general strategy to assemble and transport polarizable microparticles in fluid media through combination of confinement and magnetic dipolar interactions. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1182 | Microrollers maneuvering complex geometries | Blackwell, Brendan; Driscoll, Michelle | We study this problem experimentally using a system which consists of weakly magnetic colloids suspended in water, and driven by a rotating magnetic field. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1183 | Steering Active Colloids | Ebbens, Stephen; Kirvin, Alice; Archer, Richard; Gregory, David; Campbell, Andrew | Consequently a long held aim is to develop methods to harness this motion more effectively in order to steer the colloids towards particular targets. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1184 | Settling of shaped solids | Menon, Narayanan | Here I will present experimental and theoretical results that show qualitatively new behaviour when the particles have non-trivial shape and orientational degrees of freedom, as do snowflakes, plankton, crystals, and other natural sediment. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1185 | Analyzing the dynamics and structure of non-uniform spheroids in graviational sedimentation | Nissanka, Kavinda; Ma, Xiaolei; Burton, Justin | In a suspension of many particles, a linear stability analysis shows particles with a non-uniform mass density will self-organize into hyperuniform structures via an effective repulsive force (Goldfriend et al., Phys. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1186 | 3D printed viscotactic microswimmers | Ouhajji, Samia; Kraft, Daniela | We have started with the fabrication of trimers on the micrometre scale, the simplest form of a nonuniaxial body shape. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1187 | Low Reynolds number locomotion in truncated superparamagnetic membranes | Brisbois, Chase; Olvera De La Cruz, Monica | We show how the membrane actuation is controlled by dimensionless parameters that depend on the magnitude, angle and frequency of precessing magnetic fields to induce circumferential and radial membrane waves. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1188 | Steering toward the crowd: Orientational interactions induce active phase separation | Alert, Ricard; Zhang, Jie; Yan, Jing; Wingreen, Ned; Granick, Steve | In this talk, I will present a new mechanism for MIPS, which is based not on central forces but on torques. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1189 | Strategies for Steering Self-Propelled Active Particles | Das, Sambeeta | Here we will discuss two strategies of steering catalytic particles namely their interactions with boundaries and the use of external fields. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1190 | Simulations, experiments and applications with streaming lattices | Parthasarathy, Tejaswin; Bhosale, Yashraj; Vishwanathan, Giridar; Juarez, Gabriel; Gazzola, Mattia | Here, we present numerical predictions and experimental verifications of steady streaming realized in a periodic lattice of cylinders with alternating curvatures. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1191 | Capture of Capsular Bacteria from Flow via Polymer Depletion | Santore, Maria; Niu, Wuqi | We demonstrate here that E cells can be immobilized on otherwise non-adhesive surfaces through the introduction of a non-adsorbing polyethylene oxide polymer. | Session 71: Steerable Particles: New Ways to Manipulate Fluid-Mediated Forces |
| 1192 | Superselective colloid-surface binding via multivalent interactions | Linne, Christine; Laan, Liedewij; Kraft, Daniela | With increasing ligand/receptor concentration we observe the formation of a binding patch and a rise in the number of bound particles. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1193 | Symmetry-based discovery of multicomponent, two-dimensional colloidal crystals | Mahynski, Nathan; Pretti, Evan; Shen, Vincent; Mittal, Jeetain | We present a systematic method for computing the ground state phase behavior of multicomponent colloidal materials. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1194 | Variational inverse design for nonequilibrium colloidal self-assembly | Das, Avishek; Limmer, David | We have developed an optimization algorithm to discover nonequilibrium inverse design principles based on a trajectory ensemble formalism. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1195 | Multi-scale simulation framework for understanding pH-controlled reversible self-assembly of SiO2 nanoparticles with a bifunctional solid-binding protein | Qi, Xin; Zhao, Yundi; Boese, Julia; Hellner, Brittney; Baneyx, François; Chun, Jaehun; Pfaendtner, Jim; Mundy, Christopher | We develop a multi-scale simulation framework to link the underlying molecular-scale features of the protein/SiNP interface with experimental observations, with the goal to predict aggregation pathways and kinetics. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1196 | The Nanoscale Caterpillar : or how to achieve precise motion and assembly with random sticky feet | Marbach, Sophie; Cui, Fan; Zheng, Jeana; Pine, David; Holmes-Cerfon, Miranda | Here we present advanced theory and experimental results on a model system. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1197 | Topological Design of Heterogeneous Self-Assembly | Klishin, Andrei; Brenner, Michael | Here we use statistical mechanics, combinatorics, and spectral methods to directly relate the properties of particle sets to the yields of all structures they self-assemble. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1198 | Customized Microscale Self-assembly through Thermodynamic Valence Control | Hilgenfeldt, Sascha; McMullen, Angus; Brujic, Jasna | The spontaneous assembly of individual objects not just to rafts or clusters, but to complex structures in two or three dimensions is an important goal of both fundamental and applied research, providing insight into processes like protein folding and the synthesis of branched macromolecules. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1199 | Pairwise interactions between thermal emulsion droplets functinalized with sticky DNA strands that are mobile along the surface | Zhang, Chi; McMullen, Angus; Scheffold, Frank; Brujic, Jasna | We present results on the interaction between DNA-mediated emulsion droplets using time-shared optical tweezers. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1200 | Two-step crystallization and solid-solid transitions in binary colloidal mixtures | Fang, Huang; Hagan, Michael; Rogers, William | In this talk, I will present results of an experimental and computational study of the crystallization of a binary mixture of DNA-coated colloids. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1201 | Polymorphism and transformations of DNA-grafted colloids yield a panoply of crystal structures | Crocker, John | Here we find that, contrary to simulations, binary DNA-grafted microspheres often simultaneously nucleate and grow different crystal forms (polymorphs) in the same sample, and that these unstable ‘floppy’ crystals, during slow cooling, transform into still more crystal structures. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1202 | Linker-mediated self-assembly of mobile DNA coated colloids | Ni, Ran | Here we propose a new system of linker-mediated mobile DNA coated colloids (mDNACCs), in which the interaction between mDNACCs is induced by the bridging of free DNA linkers in solution, whose two single stranded DNA (ssDNA) tails can bind with specific ssDNA receptors of complementary sequence coated on the colloids. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1203 | Programming the self-assembly of DNA-origami colloids into nanotubes | Hayakawa, Daichi; Hall, Douglas; Grason, Gregory; Rogers, William | In this talk, I will discuss a new route for using DNA origami to make colloidal particles that then self-assemble into well-defined geometrical structures. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1204 | Classical nucleation and growth of DNA-programmed colloidal crystallization | Hensley, Alexander; Rogers, William; Jacobs, William | In this talk, I will present some of the first direct measurements of nucleation and growth of DNA-programmed crystallization. | Session 72: Programmable Self-Assembly: Particle, Interaction and Pathway Design (DNA Interactions) |
| 1205 | Landau theories of Frank-Kasper spherical packing phases | Dawson, Sarah; Shi, Anchang | In this talk I will discuss the general mechanisms that are found to promote the stability of these complex phases. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1206 | Sticky sphere packings on a cone | Plummer, Abigail; Sun, Jessica; Manoharan, Vinothan; Nelson, David | Inspired by experiments on the self-assembly of colloidal spheres on the surface of a cone, we use a greedy packing algorithm with extremely short-range attractive interactions to study how crystal growth is affected by both surface geometry and the nature of nucleation events. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1207 | Neutron Scattering on Colloidal Assemblies of Binary Particles to Extract Structural Characteristics | Patil, Anvay; Singla, Saranshu; Hu, Ziying; Bleuel, Markus; Song, Jing-Jin; Gianneschi, Nathan; Sinha, Sunil; Dhinojwala, Ali | In this work, we have measured the small angle neutron scattering from supraball assemblies constructed using binary mixtures of melanin and silica particles. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1208 | Colloidal crystallization on a cone | Sun, Jessica; Tanjeem, Nabila; Nelson, David; Manoharan, Vinothan | We study the self-assembly of colloidal spheres on the surface of a cone. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1209 | Driven lock-and-key colloidal particles for directed assembly | Yao, Tianyi; Luo, Yimin; Beller, Daniel; Serra, Francesca; Steager, Edward; Stebe, Kathleen | We extend this concept by introducing driven lock-and-key particles, inherently topologically distinct from the wavy wall. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1210 | Assembling pseudo-trimeric patchy colloids confined to a surface | Swinkels, Piet; Gong, Zhe; Sacanna, Stefano; Schall, Peter | Here, we use 4-patch particles with a tetrahedral geometry to build a 2D material. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1211 | Structure formation of colloids via capillarity at curved fluid interfaces | read, alismari; Kandy, Sreeja Kutti; Liu, Iris; Radhakrishnan, Ravi; Stebe, Kathleen | We study pair interactions and structure formation around spherical particles with pinned contact lines. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1212 | Randomness in self-assembled colloidal crystals can widen photonic band gaps through particle shape and internal structure | Wan, Duanduan; Glotzer, Sharon | Using computer simulations, we explore how thermal noise-induced randomness in a self-assembled photonic crystal affects its photonic band gaps (PBGs). | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1213 | Computational Reverse-Engineering Analysis for Scattering Experiments of Assembled Binary Colloidal Particle Mixtures | Heil, Christian; Jayaraman, Arthi | To overcome this limitation, we present our recently developed evolutionary algorithm-based method to analyze the structure of binary nanoparticle assemblies in both spherical and cubic geometries from the scattering profiles obtained from SANS of nanoparticle assemblies. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1214 | Physics and Evolution of Catalysis | Muñoz Basagoiti, Maitane; Rivoire, Olivier; Zeravcic, Zorana | Combining coarse-grained computer simulations with theory, we build structures of increasing complexity to identify the simplest structure with the potential to cleave bonds. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1215 | 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 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1216 | Controlling Stratification of Colloids Using a Mixed Binary Solvent | Liu, Binghan; Grest, Gary; Cheng, Shengfeng | With large scale molecular dynamics simulations, we show that stratification of suspended colloids can be controlled by using a mixed binary solvent with each component possessing a different relative volatility. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1217 | Self-Assembly Kinetics of Colloidal Liquid Crystals | Head, Louise; Shendruk, Tyler | In this work, we employ a nematic Multi-Particle Collision Dynamics (MPCD) algorithm to simulate the self-assembly of such structures. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1218 | Anisotropic phononic bandgaps in colloidal crystals of dumbbell-shaped nanoparticles | Kim, Hojin; Furst, Eric; Wang, Zuyuan; Fytas, George; Djafari-Rouhani, Bahram | We present theoretical calculations of the BLS-measured particle vibrational eigenmode spectra and the band structure of the phononic crystal. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1219 | Motile Crystals in Active Colloids | Nourhani, Amir; Nabavizadeh, Seyed Amin | We present the collective dynamics of active colloids capable of self-assembly into a polar motile crystal. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1220 | Role of Interfacial Free Energy in Non-classical Nucleation of Polyhedral Nanoparticles | Sharma, Abhishek; Escobedo, Fernando | For a low enough interfacial free energy, as in the case of hard cubes, the model predicts a high concentration of ordered nuclei in the disordered phase. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1221 | A computational toolbox for heterogeneous self-assembly | Curatolo, Agnese; Goodrich, Carl; Kimchi, Ofer; Brenner, Michael | Here I will present an analytical/computational toolbox to compute the yield of structures whose building blocks can have arbitrary shape and interactions. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1222 | The time complexity of self-assembly | Gartner, Florian; Graf, Isabella; Frey, Erwin | We identify distinct classes of assembly scenarios, i.e. ‘algorithms’, to accomplish this task, and show that they exhibit drastically different degrees of complexity. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1223 | 3D self-replication of DNA nanostructures | Zhou, Feng; Ni, Heng; Zhu, Guolong; Sha, Ruojie; Seeman, Nadrian; Chaikin, Paul | Here, we report the direct self-replication of a 3D object. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1224 | A Coarse-Grained Simulation Model for Self-Assembly of DNA-Coated Emulsion Droplets | Mitra, Gaurav; Chang, Chuan; McMullen, Angus; Puchall, Daniela; Brujic, Jasna; Hocky, Glen | We have designed a coarse-grained molecular dynamics simulation model to study the self-assembly of these DNA-coated emulsion droplets. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1225 | Aggregation of amyloid beta protein under different shearing conditions: Experiments and modelling | Krishnamurthy, Sriram; Sudhakar, Swathi; Mani, Ethayaraja | In this work, steady and unsteady shear experiments are performed on Aβ40 solution using a Couette cell and orbital shaker, respectively. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1226 | Elastic Frustration In Self-Assembly | Terzi, M. Mert; Le Roy, Hugo; Lenz, Martin | We tackle the frustrated self-assembly using a coarse grained, continuum model. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1227 | Renormalization group analysis of frustrated self-assembly | Koehler, Lara; Ronceray, Pierre; Lenz, Martin | To elucidate this relationship, we propose to apply real space renormalization to an on-lattice aggregation model. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1228 | Anyonic defect braiding and spontaneous chiral symmetry breaking in dihedral liquid crystals | Mietke, Alexander; Dunkel, Jorn | Starting from a generic microscopic model, we derive a unified hydrodynamic description of DLCs with aligning and anti-aligning interactions in terms of Ginzburg-Landau and Swift-Hohenberg theories for a universal complex order-parameter field. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1229 | Domain-wall networks rule the ordering dynamics of flocking matter. | Chardac, Amelie; Hoffmann, Ludwig; Poupart, Yoann; Giomi, Luca; Bartolo, Denis | Combining experiments, simulations and theory I will present how to elucidate the elementary excitations of 2D polar active matter and explain their phase ordering dynamics. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1230 | Complex and Stable Capillary Origami Structures through Adhesion | Twohig, Timothy; Croll, Andrew | Capillary origami has had great success in offering a solution to nondestructively create bends, folds, and wrinkles in even the thinnest of polymer films. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1231 | Machines made of Machines: Design and mechanical study of an active polymer | Martinet, Quentin; Aubret, Antoine; Palacci, Jeremie | Using light patterns controlled by a spatial light modulator, and photoactiveactive microparticles, we design active polymers made of active colloids. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1232 | Characterizing the routes to nonequilibrium morphologies in two dimensional microphase formers | Daga, Bijoy; Charbonneau, Patrick | We here describe and quantify the out-of-equilibrium self-assembly of two-dimensional microphase formers for various quenching protocols. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1233 | Nonequilibrium speed-up of multi-target self-assembly | Bisker, Gili; England, Jeremy | Using a toy physical model of interacting particles, we demonstrate that local driving can improve both the assembly times and kinetic stability of multi-target self-assembly. | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1234 | Harnessing the Bacterial Bath for Self-Assembly | Grober, Dan; Palacci, Jeremie | In this work, we show how the input from the bacterial bath can be directed to assist self-assembly of colloidal particles, exceeding the capabilities of a thermal bath at hot temperature | Session 73: Self-and Directed Assembly (Equilibrium and Non-equilibrium) |
| 1235 | Magnetic Handshake Materials: an Integrative Programmable Assembly Platform | Du, Chrisy Xiyu | In this talk, I will discuss how we can achieve complicated self-assembly behaviors in experiment by designing building block interactions from scratch. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1236 | Designer Potential Energy Surfaces via Magnetic Interactions | Yang, Yan; Tu, Lijie; Chen, Yuchao; Leung, Dorothy; Niu, Ran; Ko, Hsin-Yu; Yang, Yang; Sparrow, Zachary; McEuen, Paul; Cohen, Itai; Distasio, Robert | In this work, we explore how patterned magnetostatic interactions can be used in the rational design of PES with targeted features. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1237 | Magnetic coupling in colloidal clusters for hierarchical self-assembly | Donaldson, Joe; Schall, Peter; Rossi, Laura | In this work we demonstrate, by using easily accessible magnetic colloids, that we can create a variety of building blocks suitable for hierarchical self-organisation. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1238 | Designing the Persistence Length of Digital Magnetic Polymers | Zhang, Hanyu; Du, Chrisy Xiyu; Niu, Ran; Pearson, Tanner; Brenner, Michael; McEuen, Paul; Cohen, Itai | Here, we show this platform can be used to design the persistence length of digital magnetic polymers. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1239 | Pareto Fronts for Design: Optimizing Free Energy and Kinetic Accessibility for Self Assembling Colloids | Trubiano, Anthony; Holmes-Cerfon, Miranda | We construct a model that allows for the efficient computation of ground state equilibrium probabilities and transition rates, for any set of design parameters. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1240 | Tuning Kinetic Properties of Self-Assembled Systems | King, Ella; Goodrich, Carl; Schoenholz, Sam; Cubuk, Ekin; Brenner, Michael | We present a method for designing the kinetic features of self-assembled systems and demonstrate the method by tuning the crystallization rate of a 2D honeycomb lattice. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1241 | Modelling a colloidal network that can dynamically stiffen via bacterial circadian proteins, KaiABC | Melcher, Lauren; Rennert, Elisabeth; Ross, Jennifer; Rust, Michael; Robertson-Anderson, Rae; Das, Moumita | We investigate a colloidal network that can dynamically oscillate between crosslinked and unlinked states connected by bacterial clock proteins, KaiABC. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1242 | Winner-take-all dynamics in self-assembly | O’Brien, Jackson; Evans, Constantine; Winfree, Erik; Murugan, Arvind | We present experimental evidence for such winner-take-all dynamics in a system of single-stranded DNA molecules able to assemble into three distinct two-dimensional crystal configurations. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1243 | Tunable Aggregation-Induced Emission as an Indicator of Intermolecular Distance in Supramolecular Assembly | Sun, Xinyu; Zhang, Shuailin; Li, Hui; LUO, JIANCHENG; Liu, Tong; Cheng, Stephen; Liu, Tianbo | The study of macroionic-AIE hybrids in mixed solvent enabled us to gain a more direct visualization of intermolecular distances from the fluorescence emission changes. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1244 | Controlling colloidal self-organization with light | Davenport, Dominique | We will share how we create “optically-bound” structures using this pathway of self-organization. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1245 | Autonomous oscillations in the structure-function properties of dynamically regulated active colloidal networks | Macias, Vina; Melcher, Lauren; Ross, Jennifer; Rust, Michael; Robertson-Anderson, Rae; Das, Moumita | Motivated by this, we construct and study a computational model of active colloids which undergo periodic crosslinking and unlinking as a function of time. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1246 | Development of Magnetic Handshake DNA | Ng, Jakin; Zhang, Hanyu; Du, Chrisy Xiyu; Pearson, Tanner; McEuen, Paul; Brenner, Michael; Cohen, Itai | We approach this problem using building blocks based on magnetic handshake materials [1] – a scale-invariant platform using programmable lock-and-key interactions to guide self-assembly. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1247 | Creating interparticle forces with sound | St Clair, Nicholas; Davenport, Dominique; D.Kim, Arnold; Kleckner, Dustin | As this size regime prevents the use of simple analytical models, we will present a robust numerical model which allows us to study these effects in numerical simulations. | Session 74: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Magnetic Interactions) |
| 1248 | Imaging the spatiotemporal heterogeneities of gelling nanoemulsions | Hsiao, Lilian; Smith, Kristine | We use a colloidal gel system of nanoemulsion droplets of poly(dimethylsiloxane) suspended in a continuous phase, comprised of a liquid precursor that contains poly(ethylene glycol diacrylate). | Session 75: Rheology of Gels |
| 1249 | Shear-induced memory effect in boehmite gels | Sudreau, Iana; Manneville, Sebastien; Divoux, Thibaut; Servel, Marion | To understand the mechanisms by which the shear modifies the gel’s structure after flow cessation, we study the rheological properties of a boehmite gel depending on the value of the preshear rate. | Session 75: Rheology of Gels |
| 1250 | 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 75: Rheology of Gels |
| 1251 | Phase Behavior and Mechanics of Bridging Gels with pH-Tunable Attractions | Conrad, Jacinta; Gallegos, Mariah; Soetrisno, Diego; Park, Nayoung | We study the phase behavior and mechanics of a colloid-polymer model system with bridging attractions, in which the strength of the polymer adsorption can be tuned through the pH of the system. | Session 75: Rheology of Gels |
| 1252 | Two modes of cluster dynamics govern the viscoelasticity of colloidal gels | Cho, Jae Hyung; Bischofberger, Irmgard | We study the thermal fluctuations of the clusters using differential dynamic microscopy by decomposing them into two modes of dynamics, and link them to the macroscopic viscoelasticity via rheometry. | Session 75: Rheology of Gels |
| 1253 | Polymer microgels containing nanodiamonds: pH-dependent component interactions and rheology | Jani, Pallav; Farias, Barbara; Khan, Saad | Here, we investigate the pH-dependent interactions of microgels with carboxylated nanodiamonds (NDs), a relatively novel carbonaceous material, using rheology. | Session 75: Rheology of Gels |
| 1254 | Microstructure and viscoelasticity of thermoreversible gels composed of anisotropic particles with short-range interactions | SUMAN, KHUSHBOO; Lee, Haesoo; Murphy, Ryan; Wagner, Norman | To quantify these effects, we study the temperature-induced state change of a colloidal anisotropic model system of octadecyl-coated silica rods with dimensions 30 – 300 nm, also termed as adhesive hard rods (AHR). | Session 75: Rheology of Gels |
| 1255 | Isolating the yield stress in thixotropic fibrillar gels | Poling-Skutvik, Ryan; Osuji, Chinedum | Here we propose a rheological strategy to quantify the yield stress in thixotropic materials. | Session 75: Rheology of Gels |
| 1256 | Study of lifetime of bonds and microstrucure of attractive gels at intermediate volume fractions | Nabizadeh, Mohammad; Jamali, Safa | By continuously tracking bonds, we present an analysis of their life and death mechanism. | Session 75: Rheology of Gels |
| 1257 | Interplay between structure and mechanical performances of multi-component colloidal gels. | Bouzid, Mehdi; Ferreiro Cordova, Claudia; Del Gado, Emanuela; Foffi, Giuseppe | We present a detailed numerical study of composite colloidal gels obtained by arrested phase separation. | Session 75: Rheology of Gels |
| 1258 | Linear viscoelastic spectra of soft particulate gels: master curve and physical origin of the fractal constitutive behavior | Bantawa, Minaspi; Keshavarz, Bavand; Geri, Michela; Bouzid, Mehdi; Divoux, Thibaut; McKinley, Gareth; Del Gado, Emanuela | We investigate the connection between the load-bearing network structure in soft particulate gels and their linear viscoelastic spectrum in a 3-D microscopic numerical model, using large scale simulations with Optimally Windowed Chirp (OWCh) signals. | Session 75: Rheology of Gels |
| 1259 | The microstructure and rheology of a model, thermoreversible nanoparticle gel under steady shear and large amplitude oscillatory shear (LAOS) | Kim, Jung Min; Eberle, Aaron; Gurnon, A Kate; Porcar, Lionel; Wagner, Norman | The microstructure-rheology relationship for a model, thermoreversible nanoparticle gel is investigated using a new technique of time-resolved neutron scattering under steady and time-resolved large amplitude oscillatory shear (LAOS) flows. | Session 75: Rheology of Gels |
| 1260 | Direct confocal imaging of fracture precursors in casein gel | SINGH, Akash; Tateno, Michio; Simon, Gilles; Vanel, Loic; leocmach, Mathieu | For this, we have designed our own setup which is based on the principle of measuring the deflection of a cantilever. | Session 75: Rheology of Gels |
| 1261 | Interacting dislocations create shape multistability in flexible cylindrical crystals | Zakharov, Andrei; Beller, Daniel | Motivated by these observations and topological defects associated with geometrically frustrated tubular assemblies, we investigate a minimal model of dislocation dynamics in flexible 2D crystals wrapped into a cylindrical topology. | Session 76: Soft Mechanics via Geometry |
| 1262 | A fragmentation-based model for the crumpling of thin sheets | Andrejevic, Jovana; Lee, Lisa; Rubinstein, Shmuel; Rycroft, Christopher | We propose a physical explanation for this behavior by considering crumpling as a fragmentation process, partitioning a sheet into facets whose area distribution evolves according to a kinetic equation for fragmentation. | Session 76: Soft Mechanics via Geometry |
| 1263 | A computational model of thin sheets crumpled via twisting | Leembruggen, Madelyn; Andrejevic, Jovana; Kudrolli, Arshad; Rycroft, Christopher | To supplement these experimental snapshots, we introduce an efficient computational model for thin sheets that reproduces their mechanical properties and captures the phenomenology of plastic deformation under confinement. | Session 76: Soft Mechanics via Geometry |
| 1264 | Boundary Effects on Thin Film Wrinkling Patterns | Dutcher, Lauren; Lee, Carmen; Dalnoki-Veress, Kari | We focus on the effect of boundaries on the wrinkling patterns. | Session 76: Soft Mechanics via Geometry |
| 1265 | Non-Hookean Elasticity of 2D Model Tissue | Hernandez, Arthur; Marchetti, M Cristina; Bowick, Mark; Moshe, Michael; Staddon, Michael | We study the peculiar mechanical response of a mean-field approximation to the vertex model (VM) of 2D epithelia. | Session 76: Soft Mechanics via Geometry |
| 1266 | Criticality in subisostatic spring networks stabilized by thermal fluctuations | Arzash, Sadjad; Gannavarapu, Anupama; Marciel, Amanda; MacKintosh, Frederick | Here, we explore the criticality aspects of this strain-induced transition in presence of thermal fluctuations. | Session 76: Soft Mechanics via Geometry |
| 1267 | "Wrinkling in growing hyperelastic annular plates" | MEHTA, SUMIT; Raju, Gangadharan; Saxena, Prashant | In this work, we have investigated the mechanical instability in an isotropic hyperelastic growing annular plate subjected to traction on the inner and the outer edge. | Session 76: Soft Mechanics via Geometry |
| 1268 | Mechanical Adaptability of Patterns in Confined Hydrogels | Xiong, Yao; Kuksenok, Olga | We use three-dimensional gel Lattice Spring Model to simulate the dynamics of constrained hydrogels. | Session 76: Soft Mechanics via Geometry |
| 1269 | Snap-shaping groovy sheets | Meeussen, Anne; Van Hecke, Martin | Our work provides a platform where passive multistability produces controlled shape-morphing. | Session 76: Soft Mechanics via Geometry |
| 1270 | Decoding mechanics by just looking (and not deforming) | Schwarz, J. M. | And yet, constraint-counting methods, relying solely on contact network topology, can identify rigid structures within a frictional particle packing. | Session 76: Soft Mechanics via Geometry |
| 1271 | Geometric mechanics of thin sheets with cuts and folds | Niu, Lauren; Chaudhary, Gaurav; Mahadevan, L. | To quantify this, we perform numerical experiments to characterize the geometric mechanics of sheets as a function of the number, size and orientation of cuts and creases. | Session 76: Soft Mechanics via Geometry |
| 1272 | Statistical Mechanics of Low Angle Grain Boundaries in Two Dimensions | Zhang, Grace; Nelson, David | We explore order in low angle grain boundaries (LAGBs) embedded in a two-dimensional crystal at thermal equilibrium. | Session 76: Soft Mechanics via Geometry |
| 1273 | Discrete Symmetries Govern Folding of Quadrilateral-based Origami | McInerney, James; Paulino, Glaucio; Rocklin, Zeb | Here we present a novel formalism that reduces the conventional 3-vector constraints at each vertex to scalar constraints on each edge that describe the infinitesimal deformations, including face bending, of generic quadrilateral-based patterns. | Session 76: Soft Mechanics via Geometry |
| 1274 | Geometric approach to Mechanical design principles in continuous elastic sheet | Arieli, Michal; Eran, Sharon; Moshe, Michael | We present a systematic theoretical method for controlling and manipulating mechanical properties of slender solids. | Session 76: Soft Mechanics via Geometry |
| 1275 | Fracture behavior of 2D Disordered Network Mechanical Metamaterials | Reyes-Martinez, Marcos; Chan, Edwin; Soles, Christopher; Murphy, Kieran; Reid, Daniel; Jaeger, Heinrich; Nagel, Sidney; De Pablo, Juan | We take advantage of the pruning approach to study fracture behavior in 2D DNMMs. | Session 76: Soft Mechanics via Geometry |
| 1276 | Characteristics of transition to disclination disorder on curved crystalline surfaces | Agarwal, Siddhansh; Hilgenfeldt, Sascha | We previously described a criterion derived directly from shape properties of the surface that is an accurate predictor of whether a curved structure can be defect-free or not. | Session 76: Soft Mechanics via Geometry |
| 1277 | Convexity induced rigidity transitions | Gandikota, Mahesh; Parker, Amanda; Schwarz, J | We determine the existence of a rigidity-convexity correspondence in the spring network under isotropic expansion. | Session 76: Soft Mechanics via Geometry |
| 1278 | Isigami: a Novel Highly Reconfigurable Surface | Katz, Benjamin; Crespi, Vincent | Isigami: a Novel Highly Reconfigurable Surface | Session 76: Soft Mechanics via Geometry |
| 1279 | The effect of boundary curvature on the wrinkling of thin suspended films | Janssens, Stoffel; Sutisna, Burhannudin; Giussani, Alessandro; Vazquez Cortes, David; Fried, Eliot | We show that λ monotonically decreases with κ and present a model that predicts this. | Session 76: Soft Mechanics via Geometry |
| 1280 | Shapes on a plane: mechanical properties of geometric models of tissue | Sussman, Daniel | In this talk, I will discuss a theoretical framework for understanding dense cellular matter that coarse grains complex biological units into entirely geometric entities. | Session 76: Soft Mechanics via Geometry |
| 1281 | Thermal fluctuations of singular mechanical networks | Mannattil, Manu; Schwarz, J. M.; Santangelo, Christian | In this study, we explore the geometric and topological origins of these singularities and their effects when such networks are equilibrated with a thermal bath. | Session 76: Soft Mechanics via Geometry |
| 1282 | Perfectly Imperfect Origami: How the imperfections in self-folding origami allow robust folding | Lee-Trimble, Mary Elizabeth; Kang, Ji-Hwan; Hayward, Ryan; Santangelo, Christian | To attempt to understand this misfolding problem, we introduce a bar and hinge model for self-folding, triangulated origami that allows both face stretching and face bending. | Session 76: Soft Mechanics via Geometry |
| 1283 | Statistical mechanics of 2D sheets under uniaxial tension | Bahri, Mohamed El Hedi; Sarkar, Siddhartha; Kosmrlj, Andrej | Motivated by this, we investigate how isotropic sheets respond to uniaxial tension by employing the renormalization group. | Session 76: Soft Mechanics via Geometry |
| 1284 | Spontaneous Tilt of Thermalized Elastic Sheets | Chen, Zhitao; Wan, Duanduan; Bowick, Mark | Through molecular dynamic simulations and theoretical analysis, we show that a thermalized elastic sheet clamped on one edge spontaneously tilts out of the plane of clamping, hence breaking the inversion symmetry of the system. | Session 76: Soft Mechanics via Geometry |
| 1285 | Changing the jamming transition with auxetic metagrains | Haver, Daan; Coulais, Corentin | This work provides a novel method to self-adjust a close packing into the shear-jammed regime, preventing jamming inside the packing. | Session 76: Soft Mechanics via Geometry |
| 1286 | Statistical mechanics of nanotubes | Sarkar, Siddhartha; Bahri, Mohamed El Hedi; Kosmrlj, Andrej | We investigate the effect of thermal fluctuations on the mechanical properties of nanotubes by employing tools from statistical physics. | Session 76: Soft Mechanics via Geometry |
| 1287 | Diblock Copolymer Melts of Linear Chains, Rings and Trefoil Knots in Lamellar Morphology: A Molecular Dynamics Simulations Study | Carrillo, Jan-Michael; Kumar, Rajeev; Sumpter, Bobby | We present results of coarse-grained molecular dynamics simulations of phase separating diblock copolymer melts having different chain topologies. | Session 77: Topological Effects in Soft Matter |
| 1288 | Topological Tuning of Polymer and DNA Dynamics | Michieletto, Davide | In this talk, I will discuss how subtle architecture-specific topological interactions called “threadings” can be identified using persistence homology [1] and present numerical evidence of how they can drive the onset of a "topological glass" in systems of ring polymers [2,3]. | Session 77: Topological Effects in Soft Matter |
| 1289 | Nonlinear Dynamics of Nonconcatenated Entangled Ring Polymers | Rubinstein, Michael; Parisi, Daniele; Costanzo, Salvatore; Jeong, Youncheol; Ahn, Junyoung; Chang, Taihyun; Vlassopoulos, Dimitris; Halverson, Jonathan; Kremer, Kurt; Ge, Ting; Grest, Gary; Srinin, Watee; Grosberg, Alexander | We develop a shear slit model explaining many subtle details of observed conformations and dynamics as well as the chain length-dependent behavior of viscosity in the non-universal regime at large shear rates. | Session 77: Topological Effects in Soft Matter |
| 1290 | Free Energy of a Knotted Polymer Confined to Narrow Cylindrical and Conical Channels | Polson, James; Hastie, Cameron | For cylindrical confinement, we examine polymers with a single knot of topology 3 1, 4 1, or 5 1, as well as unknotted polymers that are capable of forming S-loops. | Session 77: Topological Effects in Soft Matter |
| 1291 | The many faces of topological defects in smectic liquid crystals | Monderkamp, Paul; Wittmann, Rene; Smallenburg, Frank; Loewen, Hartmut | As previous work has largely focused on understanding the topological defects in nematic liquid crystals, our goal is to quantify the topological features of smectic states in confinement. | Session 77: Topological Effects in Soft Matter |
| 1292 | Topological entanglement of polymers and viscoelasticity | Panagiotou, Eleni | In this talk we will see how rigorous measures of topological complexity from Knot Theory can be applied to quantify polymer entanglement. | Session 77: Topological Effects in Soft Matter |
| 1293 | Predicting Degeneracy and Topological Properties in 2D Phononic Band Diagrams | Dethe, Tejas; Sarkar, Siddhartha; Marincic, Matevz; Zhilkina, Polina; Kosmrlj, Andrej | We can draw analogies between band diagrams in phononic crystals that describe wave propagation and electronic band diagrams using the well-established tools in hard condensed matter theory. | Session 77: Topological Effects in Soft Matter |
| 1294 | Topological-Order Beyond 2D U(1) Systems: A Novel Perspective on Solidification and Curvature in Crystals and Glassy Solids | Gorham, Caroline | We suggest that the existence of glassy solids is an artifact of quaternion orientational order parameter undergoing a phase transition in the quaternion plane (4D/3D+1t). | Session 77: Topological Effects in Soft Matter |
| 1295 | When Do Polyelectrolytes Entangle? | Jacobs, Michael; Dobrynin, Andrey | Here, we develop an approach based on a scaling relationship between solution correlation length ξ≈lgν/B and number of monomers per correlation blob g for polymers with monomer projection length l. Numerical coeffiecients B are obtained from plateaus of normalized specific viscosity ηsp(c)cα/N as a function of monomer concentration c with degree of polymerization N. Exponent α=1/(1-3ν) describes the concentration dependence of the number of monomers per correlation blob, g∼c α. | Session 77: Topological Effects in Soft Matter |
| 1296 | Disentangling the Dynamics of Prime Knots | Park, Hyo Jung; Mahadevan, Lakshminarayanan; Lappala, Anna | With the help of Molecular Dynamics simulations, we build a framework to analyze correlated motions in prime knots modeled as polymer chains, and study how these motions relate to their local structural properties. | Session 77: Topological Effects in Soft Matter |
| 1297 | Discovering Topological Invariants in Inhomogeneous Polymeric Systems | Kumar, Rajeev | In this talk, I will present our work related to understanding topological invariants in melts of linear and ring polymers. | Session 77: Topological Effects in Soft Matter |
| 1298 | Efficient sliding locomotion for two- and three-link bodies | Alben, Silas; Puritz, Connor | We study the possibility of efficient intermittent (inertia-based) locomotion for two-link bodies that open and close periodically in time. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1299 | Terrestrial limbless gait selection through friction modulation | Zhang, Xiaotian; Naughton, Noel; Parthasarathy, Tejaswin; Gazzola, Mattia | This simple perspective provides new understanding of how snakes and other limbless creatures may exploit their compliant body and naturally occurring substrate features to achieve adaptivity, control and gait selection. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1300 | Nematode omega turns improve reorientation in a limbless robot | Wang, Tianyu; Chong, Baxi; Diaz, Kelimar; Whitman, Julian; Lu, Hang; Goldman, Daniel; Choset, Howie | We use geometric mechanics tools to model the superposition of two traveling waves to generate effective body rotation while avoiding self-collision, and generate a scheme to reorient the robot to arbitrary angles via modulation of joint angle amplitudes. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1301 | A new robophysical model for limbless locomotion reveals the importance of passive dynamics in obstacle navigation. | Maisonneuve, Marine; SCHIEBEL, PERRIN; Diaz, Kelimar; Goldman, Daniel | To discover principles by which passive body buckling can simplify control in complex terrain, we developed a robot (8 joints, 45 cm long) that models biological muscle morphology and head-to-tail propagating wave activation patterns. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1302 | Reconstruction of Backbone Curves for 3-D Locomotion of Limbless Robots | Wang, Tianyu; Lin, Bo; Chong, Baxi; Whitman, Julian; Travers, Matthew; Goldman, Daniel; Choset, Howie; Blekherman, Greg | Here we propose a method for snake robots to reconstruct desired backbone curves by solving a polynomial optimization problem that exploits the robot’s geometric structure. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1303 | A sensorized robot to study physical interaction in limbless locomotion in complex 3-D terrain | Ramesh, Divya; Fu, Qiyuan; Wang, Kaiwen; Othayoth Mullankandy, Ratan Sadanand; Li, Chen | We aim to understand how snakes sense and control physical interaction with the obstacles to generate effective locomotion. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1304 | Nonlocal control of active agents on a deformable substrate | Gynai, Hussain; Li, Shengkai; Ozkan-Aydin, Yasemin; Tarr, Steven; Aydin, Enes; Laguna, Pablo; Goldman, Daniel | In an effort to construct a robophysical analog gravity system, we previously studied the dynamics of a 200-gram differential wheeled vehicle driving on a deformable spandex membrane (d=2.4m) with a static central depression (Li et al., 2019). | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1305 | Optimizing the Locomotion of a Robotic Active Matter System of Smarticles | Taylor, Annalisa; Berrueta, Thomas; Murphey, Todd | We consider the locomotive properties of an active matter system of shape-changing robots. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1306 | Synchronized swimming: collisions drive gait compatibility in undulatory robots | Zhou, Wei; Dezha-Peralta, Jaquelin; Hao, Zhuonan; Gravish, Nick | In this presentation we demonstrate how groups of simple bio-inspired robots that move through lateral body undulation and interact only through contact forces can collectively locomote in close proximity. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1307 | Emergent cooperation in ant-like robots | Giardina, Fabio; Prasath, S Ganga; Mandal, Souvik; Murthy, Venkatesh; Mahadevan, L. | We present simple behavioral rules that lead to emerging cooperation in our robotic platform and will show how these insights can inform us on the internal processes that drive collective construction in biological systems. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1308 | When the mob sees the light – distributed learning of phototaxis without local gradients using robot morphology | Ben Zion, Matan Yah; Mirhosseini, Yoones; Bredeche, Nicolas; Dauchot, Olivier | We show that a completely decentralized population of kilobots can collectively find a successful phototactic strategy even in the total absence of a local gradient-field. | Session 78: Robophysics: Robotics Meets Physics: Limless & Collective Locomotion |
| 1309 | What can the deformation of colloids tell us about earthquake hazards? | Cooke, Michele | What can the deformation of colloids tell us about earthquake hazards? | Session 79: Soft Matter Physics in a Geophysical Context |
| 1310 | Tuning sedimentation of clay particles through surface charge interactions | Seiphoori, Ali; Gunn, Andrew; Kosgodagan Acharige, Sebastien; Arratia, Paulo; Jerolmack, Douglas | Here we tune the interaction of kaolinite clay particles from attractive to repulsive to examine the effects of surface charge on the rate and style of sedimentation. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1311 | Glassy hillslopes and quiescent sandpiles: rendering sub-yield granular creep with Diffusing Wave Spectroscopy | Deshpande, Nakul; Furbish, David; Arratia, Paulo; Jerolmack, Douglas | Nonetheless, we observe persistent creeping strains (10 -6). | Session 79: Soft Matter Physics in a Geophysical Context |
| 1312 | Pressure response on granular impacts: how far the Boussinesq model can go? | Martinez Carreaux, Francisco Javier; Urrea, Maria P.; Gonzalez, Claudia M.; Varas, German | In the present report, we question how this model can be extended when dealing with granular impacts. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1313 | Mud as a soft matter system: Stability of aggregates under time-periodic flow | Bester, Cacey; Galloway, Larry; Lee, Dylan; Arratia, Paulo; Jerolmack, Douglas | We thereby describe the formation, breakup, and transport of granular aggregates due to the relative importance of shear stresses and interparticle forces. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1314 | Stick-slip dynamics generated by granular materials with varying grain angularity | Kozlowski, Ryan; Zheng, Hu; Daniels, Karen; Socolar, Joshua | In this work, we experimentally investigate the effects of grain angularity on stick-slip dynamics in a slowly driven granular medium consisting of regular polygonal grains; the gravity-packed granular bed is sheared via a weighted slider pulled by a spring. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1315 | Probing Granular Materials in Extraterrestrial Gravities | Featherstone, Jack; Bullard, Robert; Emm, Tristan; Jackson, Anna; Reid, Riley; Shefferman, Sean; Dove, Adrienne; Colwell, Joshua; Kollmer, Jonathan; Daniels, Karen | We employ a classic granular physics technique, photoelasticity, to quantify the dynamics of a flexible intruder during its insertion into a laboratory system of bi-disperse, cm-sized model grains at various speeds and under four different levels of gravity: terrestrial, martian, lunar, and microgravity. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1316 | Densest Packings of Binary Frictional Particles | Silbert, Leo; Srivastava, Ishan; Roberts, Scott; Grest, Gary; Lechman, Jeremy | Using a pressure-controlled discrete element method, implementing a highly efficient neighbor-detection algorithmic scheme, we have generated a large number of binary sphere-packings spanning a wide range in particle size ratio and filling fraction of small particles, over several orders of magnitude in particle friction coefficient. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1317 | Slow dynamic nonlinear elasticity in novel systems | Yoritomo, John; Weaver, Richard | Slow dynamic nonlinear elasticity in novel systems | Session 79: Soft Matter Physics in a Geophysical Context |
| 1318 | The lifetime of charge on a lofted particle | Harvey, Dana; Mendez, Joshua; Huang, Tianshu; McGrath, Jake; Burton, Justin | Here we use an acoustic radiation trap to levitate and measure the net charge on isolated, millimetric particles for days. | Session 79: Soft Matter Physics in a Geophysical Context |
| 1319 | Explaining the mechanical properties of hygroscopic bacterial spores using water nanoconfinement | Harrellson, Steven; DeLay, Michael; Chen, Xi; Cavusoglu, Ahmet Hamdi; Sahin, Ozgur | Here we show the coupling of the mechanical properties and water nanoconfinement in Bacillus Subtilis spores can be understood by using a simple statistical mechanical model. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1320 | Adaptable hydrogels for organoid culture | Heilshorn, Sarah | Here we present the design of a family of double-network hydrogels that undergo two stages of crosslinking: the first stage uses reversibly dynamic covalent chemistry bonds, while the second stage reinforces the hydrogel through thermal-induced polymer aggregation. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1321 | Polymer field theory applied to Liquid Crystal Elastomers | Khandagale, Pratik; Majidi, Carmel; Dayal, Kaushik | In the many-chain setting, we use statistical field theory to account for inter-segment interaction using an excluded volume approach. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1322 | Computational Study of Mechanochemical Activation in Nanostructured Triblock Copolymers | Huo, Zijian; Laaser, Jennifer; Statt, Antonia | In this work, we use molecular dynamics simulations to investigate mechanical activation in ABA triblock copolymers. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1323 | Computational Study of the AC Susceptibility of Isolated Magnetic Nanoparticles in a Polymer Suspension | Kreissl, Patrick; Holm, Christian; Weeber, Rudolf | We present a computational study of isolated magnetic nanoparticles in a polymer suspension, considering only hydrodynamic and excluded volume interactions. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1324 | A Kinetic Monte Carlo algorithm for swelling drug delivery systems | Ignacio, Maxime; Slater, Gary | In this talk, we present this algorithm and test it for systems where one can derive an analytical solution, namely a core/shell structures and a swelling system in the adiabatic regime. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1325 | Microion-Driven Free Swelling of Cylindrical Ionic Microgels | Alziyadi, Mohammed; Denton, Alan | Combining electrostatic and gel osmotic pressures, the latter modeled using Flory-Rehner theory, we explore the dependence of swelling on charge density and salt concentration. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1326 | Chemical controlled tangential growth leads to autonomous shell morphology | Li, Siyu; Matoz Fernandez, Daniel; Olvera De La Cruz, Monica | In this work, we study the autonomous shell dynamics undergoing a periodically reduction-oxidation reaction and build a general model to simulate the chemical reaction and the shell elasticity simultaneously. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1327 | Polymer Dispersity Affects Conformation of Brushes Grafted on Nanoparticles | Li, Tzu-Han; Yadav, Vivek; Conrad, Jacinta; Robertson, Megan | Here, we show that the effect of dispersity on the conformational pH-response of polyelectrolyte brushes depends on the molecular weight. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1328 | Exploration of the ordered morphologies of thermo- and photo-responsive LCOT block copolymer systems | Seitzinger, Claire; Lodge, Timothy | By incorporating small amounts of the photoactive molecule azobenzene into the polymer sidegroups, we have identified a system that exhibits both thermo- and photo-responsive behavior. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1329 | A biocompatible hydrogel pH sensor to measure tumor acidosis | Kiridena, Sachindra; Wijayaratna, Uthpala; Arifuzzaman, MD; Anker, Jeffrey | We developed a chemically responsive polyacrylic acid-based injectable hydrogel sensor to noninvasively measure local pH in a tumor location biopsied and used for diagnosis using plain radiography. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1330 | Monitoring prosthetic hip infections using a synovial fluid pH sensor | Wijayaratna, Uthpala; Kiridena, Sachindra; Arifuzzaman, MD; Anker, Jeffrey | We developed a hydrogel-based synovial fluid pH sensor which can be attached to prosthetic hips for early detection and monitoring of hip infections using plain radiography. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1331 | Magnetically triggered heating in poly acrylic acid stabilized magnetic nanoemulsions: influence of surfactant conformation on global heating efficiency | Ranoo, Surojit; Lahiri, Barid; Philip, John | Magnetically triggered heating in poly acrylic acid stabilized magnetic nanoemulsions: influence of surfactant conformation on global heating efficiency | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1332 | Ferroelasticity in magnetorheological elastomers | Rambausek, Matthias; Danas, Kostas | Our contribution is inspired by experimental observations and highlights a third avenue to potential applications that is based on the physics that emerge from microstructural multistability of very soft MREs: ferroelasticity. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1333 | Light and Magnetic Control of Hydrogel Robots | Yuan, Hang; Li, Chuang; Aggarwal, Aaveg; Lau, Garrett; Stupp, Samuel; Olvera De La Cruz, Monica | We report here on the design of hydrogels containing aligned ferromagnetic nanowires dispersed in a polymer network that change shape in response to light and experience torques in rotating magnetic fields. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1334 | Controlled tough responsive tissue adhesion | Li, Jianyu | This talk will present design strategies and material systems to achieve controlled tough responsive tissue adhesion. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1335 | Using Reactive Dissipative Particle Dynamics to Understand Local Shape Manipulation of Polymer Vesicles | Zhu, Qinyu; Scott, Timothy; Tree, Douglas | To better understand the possible mechanisms of local morphological changes in a popular protocell system, the block copolymer vesicle, we developed a reaction-diffusion model that combines Dissipative Particle Dynamics (DPD) and the Split Reactive Brownian Dynamics algorithm (SRBD), which is capable of modeling the dynamics of polymer solution as they undergo chemical reactions. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1336 | Stretchable wavy structures on dielectric elastomeric substrates | Ghosh, Abhishek; Basu, Sumit | The efficiency of the system(within the failure bounds) and the extent up to which the mechanical instability can be harnessed in this system, under an applied electric field, is studied in this work. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1337 | A Methodology for Calibrating Mechanophore Activation Intensity to Applied Stress | Rencheck, Mitchell; Mackey, Brandon; Chang, Chia-Chih; Sangid, Michael; Davis, Chelsea | To date, semi-quantitative studies have shown that the fluorescent intensity increases with applied force, but systematic calibration of the MP response to local stresses remains a current challenge. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1338 | Controlling phase behavior of diamagnetic, low viscosity polymer solutions using low intensity magnetic fields | Suresh, Karthika; Calabrese, Michelle | Assembling materials via this mechanism provides a new approach to develop BCP materials with long-range order using low-intensity magnetic fields. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1339 | Magnetoelastic actuation of superparamagnetic nanoparticle membranes | Esposito, Edward; Jackson, Grayson; Jaeger, Heinrich | We find that an applied magnetic field can induce large, micron-scale deflections of the membranes, which we track in 3D with high-resolution confocal microscopy. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1340 | Room Temperature Photochemical Actuation of A Semi-Crystalline Poly(azobenzene) | Zhou, Hantao; Kuenstler, Alexa; Hayward, Ryan | We have shown the ability to reversibly destroy and restore semi-crystalline order by photo isomerization of azobenzene powered by UV and visible light, respectively. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1341 | Light activated folding of hydrogel sheets into origami inspired 3D structures | Aggarwal, Aaveg; Olvera De La Cruz, Monica | To this end, we report our theoretical work on the light induced deformations in spiropyran based hydrogel systems and the design of self-folding origami structures using this photo-active material. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1342 | Eliciting diverse self-regulated actuation pathways from a compositionally uniform liquid crystalline elastomer microstructure | Li, Shucong; Lerch, Michael; Martens, Reese; Deng, Bolei; Waters, James; Yao, Yuxing; Bertoldi, Katia; Aizenberg, Michael; Balazs, Anna; Aizenberg, Joanna | Here, we report a conceptually new approach to reconfigurable microactuators: by employing directional stimuli on a single high-aspect-ratio micropost fabricated from compositionally uniform materials (a photoresponsive liquid crystalline elastomer) with tilted directionality, we elicit reversible, multimodal deformations including light-seeking, light-avoiding, clockwise and counterclockwise twisting. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1343 | Programmable Photothermal Actuators Using Donor Acceptor Stenhouse Adducts Photoswitches | Lee, Jaejun; Sroda, Miranda; Stricker, Friedrich; Read de Alaniz, Javier; Valentine, Megan | We introduce a novel approach for programmable actuation using negatively photochromic molecular photoswitches, termed donor-acceptor Stenhouse adducts (DASAs), capable of generating programmed mechanical energy using photochemically programmed logic. | Session 80: Responsive Polymers, Soft Materials, and Hybrids |
| 1344 | Computational Enzyme Design: Progress and Obstacles | Young, Naomi | This talk draws from this review to discuss the significant developments of computational enzyme design within the last five years and unique solutions to long-standing issues. | Session 81: Physics of Proteins |
| 1345 | Non-Equilibrium Dynamics of a Pump Protein Measured with Multidimensional Single-Molecule Spectroscopy | King, John; talele, saurabh | Here, we study the dynamics of bacteriorhodopsin during its light-activated, multi-step catalytic cycle that results in vectorial H+ transport across a membrane. | Session 81: Physics of Proteins |
| 1346 | Probing Local Structures of an Intrinsically Disordered Protein Through Single-Molecule Force Stretching Experiments | Truong, Hoang; Morgan, Ian; Saleh, Omar | Overall, we show complex elastic behaviors that reveal local structures in an IDP, and we demonstrate a framework to study the conformations of IDPs through force stretching experiments. | Session 81: Physics of Proteins |
| 1347 | Protein Dynamics from Distance Predictions | Jarrett, Austin; Morris, Connor; Della Corte, Dennis | Many of these methods use machine learning techniques to generate inter-residue distance predictions. | Session 81: Physics of Proteins |
| 1348 | Network inference for analyzing protein dynamics | Liu, Jenny; Keten, Sinan; Amaral, Luis A | We apply this inverse approach to two adhesion proteins, FimH and Siglec-8, to identify networks that are distinct from correlation networks and instead resemble a contact map. | Session 81: Physics of Proteins |
| 1349 | Computation of exit times for potential landscapes in CRISPR binding | Rigas, Pete | In this work, an IVP associated with a stochastically driven oscillator for the exit time will be presented, from which exit times for varying potential landscapes are obtained. | Session 81: Physics of Proteins |
| 1350 | The folding of a metamorphic protein | Wallin, Stefan; Seifi, Bahman | We used a hybrid sequence-structure based all-atom model to simulate the folding and fold switching of the C-terminal domain (CTD) of the bacterial transcription factor RfaH, a prototypical metamorphic protein. | Session 81: Physics of Proteins |
| 1351 | Sequence-dependent mechanics of collagen proteins reflect their structural and functional organization | Al-Shaer, Alaa; Lyons, Aaron; Ishikawa, Yoshihiro; Hudson, Billy; Boudko, Sergei; Forde, Nancy | Here, we combine position-dependent flexibility analysis with single-molecule imaging by atomic force microscopy (AFM), and find that collagens exhibit variable flexibility along their backbones. | Session 81: Physics of Proteins |
| 1352 | Time-resolved Infrared Structural Biology of Proteins: Bringing New Light to Protein Structural Dynamics and Function | Xie, Aihua | Time-resolved Infrared Structural Biology of Proteins: Bringing New Light to Protein Structural Dynamics and Function | Session 81: Physics of Proteins |
| 1353 | Universality in activated barrier crossing | Adhikari, Sudeep; Beach, Kevin | We identify universal behavior of the barrier crossing process and demonstrate that data collapse onto a universal curve can be achieved for simulated data over a wide variety of energy landscapes having barriers of different height and shape. | Session 81: Physics of Proteins |
| 1354 | Molecular Dynamics Investigations of Inward-facing and Outward-facing Isomerization of PfMATE | Hossen, Md Lokman; Bhattarai, Nisha; Gerstman, Bernard; Chapagain, Prem | To investigate this process, we performed molecular dynamics simulations of different systems of inward- and outward-facing PfMATE in the native archaeal lipid bilayer. | Session 81: Physics of Proteins |
| 1355 | A local probe for evolutionary conformational changes of proteins | Das, Tamoghna; Tlusty, Tsvi | Here, we employ a purely geometric, nonlinear measure of local conformational changes and study its statistics. | Session 81: Physics of Proteins |
| 1356 | Tug-of-war in motor proteins and the emergence of Levy walk | Moon, Kyungsun; Moon, Hyungseok | We have theoretically studied a random walk model based on majority rule. | Session 81: Physics of Proteins |
| 1357 | The generalized capstan equation: contact mechanics between an elastic rod and a frictional rigid cylinder | Grandgeorge, Paul; Sano, Tomohiko; Reis, Pedro | In this talk, we present an enhanced capstan model based on Kirchhoff-rod theory, which considers both the thickness and elasticity of the sliding filament. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1358 | Packing Architecture and Mechanical Behaviors of Flexible Filaments Confined in Vesicles | Yi, Xin; Shi, Chao | Here we present our recent theoretical work on how packing architectures and mechanical behaviors of confined flexible nanofibers in vesicles are regulated by the the filament length and rigidities. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1359 | Time-dependent Knotting of Agitated Chains | Gendron, Ingrid; Savard, Katherine; Capaldi, Xavier; Capaldi, Luc; Liu, Zezhou; Zeng, Lili; Reisner, Walter | Here we present an experimental setup in which knot formation is driven by a tumbling motion along with a software interface to process complex knot data with high crossing numbers. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1360 | Bioinspired architected composites with enhanced energy absorption | Jiang, Huan; Chen, Yanyu | Inspired by the multiscale configuration of the microstructure of cork, here we create a new type of lightweight architected composite structure with a multilayered arrangement of hard brittle and soft flexible phases. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1361 | Percolation Threshold of Kinetoplast DNA Networks | Ragotskie, Joshua; Morrison, Nathaniel; Blair, Ryan; Klotz, Alexander | With this protocol we can study the mechanics of membranes with varied bending rigidity, and we observe that dynamics are slowed by link removal. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1362 | Emergent plasticity and hysteresis in disordered packings of filaments. | Weiner, Nichalas; Bhosale, Yashraj; King, Hunter; Gazzola, Mattia | Emergent plasticity and hysteresis in disordered packings of filaments. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1363 | Energy Harvesting in Soft Materials | Ghosh, Nilanjana; Paley, Derek | We use planar Discrete Elastic Rod theory combined with an equivalent circuit models of a piezoelectric device to describe energy generation during stretching and bending motion of a soft robotic appendage in a fluid. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1364 | Let me spin you a yarn: fiber geometry and the elasticity of twisted filaments | Atkinson, Daria; Santangelo, Christian; Grason, Gregory | Ordered ground states in filament bundles, however, are highly geometrically constrained, and we show that only two families of filament textures permit equidistance between the constituent filaments—the developable domains, which can bend, but not twist, and the helical domains, which can twist uniformly, but not bend. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1365 | Physical trefoil knots: elastic deformation and failure | Johanns, Paul; Grandgeorge, Paul; Sano, Tomohiko; Baek, Changyeob; Maddocks, John; Reis, Pedro | To understand the local geometry of this fundamental knot, we constructed both open and closed physical trefoil knots tied in an elastic rod. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1366 | Towards an understanding of the mechanical response of aramid fibers at the filament scale | Richard, Clotilde; Joannès, Sébastien; Marcellan, Alba | In this work, we developed multiaxial characterization techniques at the filament scale. | Session 82: Textiles and Topology: Filaments and Tangles |
| 1367 | Theory of segmental relaxation and shear elasticity in polymer nanocomposites | Zhou, Yuxing; Schweizer, Kenneth | We recently studied dynamic elasticity in melt polymer nanocomposites (PNCs) using naïve mode coupling theory with structural inputs obtained from PRISM theory (J. Chem. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1368 | Molecular Orientation of Phenyl Groups at Graphene/Polystyrene Interface | Kumar, Nityanshu; Singla, Saranshu; Yang, Feipeng; Foster, Mark; Tsige, Mesfin; Dhinojwala, Ali | Here, we report the use of interface-sensitive sum-frequency generation spectroscopy (SFG), molecular dynamics (MD) simulations, and density functional theory (DFT) to study the orientation of polystyrene chains next to graphene/polystyrene interface. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1369 | Effect of Chemical Heterogeneity and Architecture of the Interphase on the Rheological Behavior of Polymer Nanocomposites | Wu, Di; Akcora, Pinar | Effect of Chemical Heterogeneity and Architecture of the Interphase on the Rheological Behavior of Polymer Nanocomposites | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1370 | Investigation of polymer behavior confined in the heterogeneous environment using a 2-dimensional model nanocomposite | Gong, Chen; Weiblen, Donovan; Rende, Deniz; Wu, Di; Akcora, Pinar; Ozisik, Rahmi | In the current work, a 2-dimensional model nanocomposite is adopted to help understand local thermal properties and dynamics at the heterogeneous interface. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1371 | Photostability of Organic Glasses under Extreme Nanoconfinement | Chen, Yueli; Wang, Haonan; Shamsabadi, Ahmad; Fakhraai, Zahra | Previous work has established capillary rise infiltration (CaRI) technique can induce extreme nanoconfinement and significantly affect the properties of materials. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1372 | The Critical Role of the Interfacial Layer in Polymer Nanocomposites | Sokolov, Alexei | In this talk we overview recent studies on structure and dynamics of the interfacial layer in various polymer nanocomposites (PNCs). | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1373 | Characteristics of the bound polymer layer in polymer nanocomposites | Lin, Emily; Wang, Kaitlin; Frischknecht, Amalie; Winey, Karen; Riggleman, Robert | In this study, we used classical density functional theory (DFT) calculations and molecular dynamics (MD) simulations to characterize the effect of polymer-nanoparticle interaction, polymer chain length, and nanoparticle size on the polymer conformation and adsorption thermodynamics and dynamics in the bound polymer layer. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1374 | Molecular Design of Hairy Nanocrystals for Elastomeric Reinforcement | Srivastava, Aarushi; Zhao, Yihong; Meyerhofer, John; Jia, Li; Foster, Mark | Molecular Design of Hairy Nanocrystals for Elastomeric Reinforcement | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1375 | Modifying the surface properties of polymer films by utilizing polymer/inorganic nanocomposites | Anastasiadis, Spiros; Krasanakis, Fanourios; Chatzaki, Thaleia-Michaela; Theodorakis, Antigonos; Chrissopoulou, Kiriaki | In this work, we report on the development of superhydrophobic and water repellent polymer nanocomposite coatings deposited on soft polyethylene, PE, substrates by utilizing nanoadditives of different geometries and sizes. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1376 | Polymer/Graphene oxide nanocomposites: Effect of the interfacial interactions on the structure and properties. | Krasanakis, Fanourios; Karnis, Ioannis; Rissanou, Anastassia; Karatasos, Konstantinos; Chrissopoulou, Kiriaki | In this work, nanohybrids of either linear or hyperbranched polymers and graphene oxide (GO) of varying degree of oxidation are developed to investigate the effect of the different hydrophilicity of the filler on the final structure and properties of the nanohybrids. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1377 | Nano-indentation of nanocomposite polyester coatings | Ahuja, Suresh | The aim of this study was to compare and analyze the mechanical response of nano-indentation loading on surfaces and interfaces of polyester films both linear and cross-linked. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1378 | Revealing the structures and dynamics of isotactic polypropylene bound to carbon fibers | Huang, Zhixing; Nakanishi, Yohei; Endoh, Maya; Uchida, Kiminori; Yamada, Takeshi; Mita, Kazuki; Koga, Tad | Here we present the structures and dynamics of the BPL layer formed on carbon fiber (CF) surfaces. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1379 | Multiple roles of bound polymer chains in rubber reinforcement | Koga, Tad; Salatto, Daniel; Carrillo, Jan-Michael; Endoh, Maya; Masui, Tomomi; Kishimoto, Hiroyuki; Taniguchi, Takashi; Tyagi, Madhusudan; Sakai, Victoria; Kruteva, Margarita; Richter, Dieter; Nagao, Michihiro | To address this issue, we tackle the critical, but unsolved issue in the field: the roles of polymer chains bound to the filler surface in improving mechanical properties. | Session 83: Polymer Nanocomposites: Surfaces and Interfaces |
| 1380 | Extraordinary KE Absorption in Multi-walled Carbon Nanotubes Mats under High Strain Rate Deformation | Hyon, Jinho; Lawal, Olawale; Ramathasan, Thevamaran; Song, Ye Eun; Thomas, Edwin | We investigate the energy absorption characteristics and associated deformation behavior of an initially low modulus, low strength, porous, unoriented nonwoven multi-walled carbon nanotubes (MWCNT) mats. | Session 84: Polymers in Extreme Environments |
| 1381 | Failure Mechanisms in Polymer Grafted Nanoparticle Thin Films Under High Strain Rate | Souna, Amanda; Evans, Katherine; Chan, Edwin; Soles, Christopher; Jhalaria, Mayank; Kumar, Sanat | In this work, we address this question by using laser-induced projectile testing (LIPIT) to study the fracture behavior of poly(methyl acrylate)-grafted silica nanoparticle thin films. | Session 84: Polymers in Extreme Environments |
| 1382 | Why Enhanced Sub-Nanosecond Relaxations are Important for Toughness in Polymer Glasses | Soles, Christopher; Burns, Adam; Ito, Kanae; Chan, Edwin; Douglas, Jack; Wu, Jinhuang; Yee, Albert; Huang, Liping; Dimeo, Robert; Tyagi, Madhusudan | We demonstrate a strong correlation between these fast polymer relaxations and toughness. | Session 84: Polymers in Extreme Environments |
| 1383 | Novel Deformation Behaviors in Nanoscale Polymer Systems Via Supersonic Micro-Projectile Impact | Thomas, Edwin; Goddard, Natalie; Lee, Jae-Hwang; Hyon, Jinho | Novel Deformation Behaviors in Nanoscale Polymer Systems Via Supersonic Micro-Projectile Impact | Session 84: Polymers in Extreme Environments |
| 1384 | Failure behavior of polycarbonates plates subjected to ultra-high strain rates impact | Callahan, Kyle; Heard, William; Kundu, Santanu | Here, we report the failure behavior of monolithic polycarbonate plates subjected to ultra high strain rates due to the impact of a 4 mm projectile traveling in the velocity range of 3-6 km/s achieved using a two-stage light gas gun (2SLGG). | Session 84: Polymers in Extreme Environments |
| 1385 | Near-surface rheology and hydrodynamic boundary condition of semi-dilute polymer solutions | Guyard, Gabriel; Vilquin, Alexandre; Sanson, Nicolas; Restagno, Frederic; McGraw, Joshua | Near-surface rheology and hydrodynamic boundary condition of semi-dilute polymer solutions | Session 84: Polymers in Extreme Environments |
| 1386 | Role of Added Mass in Defining the Ballistic Limit of Polymer Thin Films | Chen, Shawn; Souna, Amanda; Stranick, Stephan; Soles, Christopher; Chan, Edwin | In this contribution, we quantify the ballistic limit of thin polymer films using a recently developed micro-projectile impact test called laser-induced projectile impact testing (LIPIT). | Session 84: Polymers in Extreme Environments |
| 1387 | Inhomogeneous Deformation Fields within a Double-Twist Cylinder | Leighton, Matthew; Kreplak, Laurent; Rutenberg, Andrew | We present a general thermodynamic framework for modelling the deformation of a nematic liquid crystal elastomer. | Session 84: Polymers in Extreme Environments |
| 1388 | Finite Element Modelling of Active Gels with non-Gaussian Compressible Polymeric Networks | Nemani, Priyanka; Ayyagari, Ravi Sastri; Dayal, Pratyush | Here, we develop a generic theoretical framework, based on finite element method, to simulate mechanical response of both active and inactive polymer gels. | Session 84: Polymers in Extreme Environments |
| 1389 | Visualization of Assembly and Dynamics of Anisotropic Nanoparticles on Liquid Surfaces | Srivastava, Satyam; fink, zachary; Kim, Paul; Hoagland, David; Russell, Thomas | Visualization of Assembly and Dynamics of Anisotropic Nanoparticles on Liquid Surfaces | Session 84: Polymers in Extreme Environments |
| 1390 | High strain rate deformation of concentric layer diblock copolymer microspheres | Shan, Wenpeng; Thomas, Edwin; Weisbord, Inbal; Segal-Peretz, Tamar | High strain rate deformation of concentric layer diblock copolymer microspheres | Session 84: Polymers in Extreme Environments |
| 1391 | Packing and Phase Behaviour of Semi-Flexible Athermal and Attractive Polymers under Extreme, Plate-like Confinement | Pedrosa, Clara; Martinez Fernandez, Daniel; Ramos, Pablo; Herranz, Miguel; Karayiannis, Nikos; Laso, Manuel | A simple model is proposed to explain the observed simulation trends and the established ordered morphologies. | Session 84: Polymers in Extreme Environments |
| 1392 | A resilin-like retractable and stretchable hydrogel | Badani Prado, Rosa Maria; Mishra, Satish; Morgan, Buckston; Kundu, Santanu | Here, we present a hydrogel system synthesized through a simple chemical reaction scheme using hydrophilic acrylic acid and methacrylamide, and hydrophobic poly(propylene glycol) diacrylate [PPGDA]. | Session 84: Polymers in Extreme Environments |
| 1393 | Pushing the Limits of Size Control for Geometrically Frustrated Assembly of Ribbons and Rings | Hall, Douglas; Stevens, Mark; Grason, Gregory | We describe a system of negatively curved 2d assemblies that form rings and ribbons limited by geometric frustration. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1394 | Geometrically Frustrated Self-assembly of Curved Colloidal Particles | Tanjeem, Nabila; Hall, Douglas; Santangelo, Christian; Grason, Gregory; Hayward, Ryan | We developed a model of the curvamers and performed molecular dynamics simulations to realize the self-limiting behavior. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1395 | Bioinspired self-healing polypeptides | Pena-Francesch, Abdon; Demirel, Melik; Sitti, Metin | Here, we introduce self-assembled polypeptides that self-heal micro- and macro-scale mechanical damage within a second via reversible physical cross-linking. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1396 | Entropically engineered fivefold and icosahedral twin clusters of colloidal shapes | Lee, Sangmin; Glotzer, Sharon | Numerous methods have been proposed to control the formation of such structures, and complicated interparticle interactions or geometric confinement are widely considered to be essential. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1397 | Congruent Phase Behavior of a Binary Compound Crystal of Colloidal Spheres and Dimpled Cubes | Quintela Matos, Isabela; Escobedo, Fernando | We expect the principles developed in this study to apply to other particle shapes and crystalline phases. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1398 | Local signatures of emerging global order in complex crystal growth | Martirossyan, Maya; Spellings, Matthew; Dshemuchadse, Julia | Using molecular dynamics simulations of particles interacting via isotropic pair potentials, we assemble a diverse set of complex crystal structures [1] and observe the crystallization process. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1399 | Self-Assembly of Chiral Metal-Organic Cages at the Presence of Chiral Counterions: Chirality Effects on the Intermolecular Interactions | Raee, Ehsan; Li, Hui; Sun, Xinyu; Ustriyana, Putu; LUO, JIANCHENG; Chen, Jiahui; Sahai, Nita; Liu, Tianbo | In this work, positively charged alanine-based D- and L-Pd 12Ala 24 metal organic cages (MOCs) self-assemble into single-layered hollow spherical blackberry-type supramolecular structures by adding extra nitrates through counterion-mediated attraction. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1400 | Anisotropic Nanocrystal Shape and Ligand Design for Co-Assembly | Elbert, Katherine; Zygmunt, William; Vo, Thi; Vara, Corbin; Rosen, Daniel; Krook, Nadia; Glotzer, Sharon; Murray, Christopher | Here, we present a theory-driven approach for designing the co-assembly of cubes and triangular prisms. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1401 | Frustrated Self-Assembly of Non-Euclidean Crystals of Nanoparticles | Serafin, Francesco; Lu, Jun; Kotov, Nicholas; Sun, Kai; Mao, Xiaoming | We present an analytic theory of tetrahedral nanoparticles self-assembling in 3D space, where unavoidable geometrical frustration combined with competing attractive and repulsive inter-particle interactions lead to controllable, high-yield, and enantiopure self-assembly of quasi-2D helicoidal ribbons. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1402 | Aggregation Transitions in a Minimal Model of Geometrically Frustrated Assembly | Hackney, Nicholas; Grason, Gregory | We describe a 2D lattice model of geometrically frustrated assembly, which encodes both positional and “shape misfit” degrees of freedom of assembling subunits. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1403 | Size control and escape mechanisms in geometrically frustrated assemblies | Tyukodi, Botond; Mohajerani, Farzaneh; Grason, Gregory; Hagan, Michael | In this talk we describe simulations of geometrically frustrated assembly motivated by ongoing experiments on DNA origami building blocks. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1404 | Learning to grow: control of material self-assembly using evolutionary reinforcement learning | Whitelam, Stephen; Tamblyn, Isaac | We show that neural networks trained by evolutionary reinforcement learning can enact efficient molecular self-assembly protocols. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1405 | Bioinspired Self-Assembly of Hollow Nanoparticles | Singla, Saranshu; Yang, Zepeng; Patil, Anvay; Htut, K Zin; Shawkey, Matthew; Dhinojwala, Ali | We will present the reflectance data and our optical simulation results to explain the changes in colors between the core-shell and hollow nanoparticles. | Session 85: Programmable Self-Assembly: Particle, Interaction and Pathway Design (Shape/Entropic Interactions) |
| 1406 | Modelling flow and rheology of Graphene | Kamal, Catherine; Gravelle, Simon; Botto, Lorenzo | We study theoretically the rotational dynamics and rheology of dilute suspensions of rigid graphene in a simple shear flow. | Session 86: Rheology and Flow of Soft Materials |
| 1407 | Shear Yieldind and Percolation Transition in Smectics Liquid Crystals | Carenza, Livio Nicola; Gonnella, Giuseppe; Marenduzzo, Davide; Negro, Giuseppe | Here, we numerically study the rheology of lyotropic smectic liquid crystals by means of a continuous approach based on the Brazovskii theory for microphase separation [1]. | Session 86: Rheology and Flow of Soft Materials |
| 1408 | Rheology of associative telechelic polymer – latex suspension | Mani, Ethayaraja; Parthasarathy, Gopal; Travitz, Alyssa; Larson, Ronald | We report a computational study on the rheology of latex suspension, where the interparticle interactions are mediated by associative polymers such as hydrophobically-modified ethylene oxide urethane. | Session 86: Rheology and Flow of Soft Materials |
| 1409 | Structural and rheological properties of Janus colloid-polymer mixtures in dilute solution under shear | Kobayashi, Yusei; Arai, Noriyoshi; Nikoubashman, Arash | We investigate the structure and rheological properties of dilute colloid-polymer mixtures at rest and under shear via molecular simulations that take into account hydrodynamic interactions. | Session 86: Rheology and Flow of Soft Materials |
| 1410 | Memory effects in dense colloidal suspensions | Ruscher, Celine; Thalmann, Fabrice; Hebraud, Pascal | We propose to investigate the microscopic origin of the macroscopic flow of a dense colloidal suspension at room temperature by considering Brownian dynamic simulations of a binary quasi hard spheres mixture. | Session 86: Rheology and Flow of Soft Materials |
| 1411 | Amplitude Nanofriction Spectroscopy | Lainé, Antoine; Vanossi, Andrea; Nigues, Antoine; Tosatti, Erio; Siria, Alessandro | We present here an experimental and simulation approach, taking advantage of a high frequency oscillatory imposed strain to obtain a one-shot investigation of all these successive interfacial responses. | Session 86: Rheology and Flow of Soft Materials |
| 1412 | Sliding Friction of Amorphous Asperities on Crystalline Substrates: Scaling with Contact Radius and Substrate Thickness | Monti, Joseph; Robbins, Mark | For bulk systems, we find an exponential decrease of the large a frictional stress and 1/λ with increasing G/τ 0, while the same quantities decrease linearly with increasing G/τ 0 for thin free-standing films. | Session 86: Rheology and Flow of Soft Materials |
| 1413 | Drying-induced cracking and bending of nanoparticle suspension drops | Lilin, Paul; Bourrianne, Philippe; Bischofberger, Irmgard | Using poroelasticity theory, we estimate the stress caused by water flowing in the deposit and show that it can predict both the onset of crack formation for various drying conditions and particle volume fractions, and the shape of the petals as they bend. | Session 86: Rheology and Flow of Soft Materials |
| 1414 | 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 86: Rheology and Flow of Soft Materials |
| 1415 | Nanoscale flow field induced by Brownian motion of particles trapped at complex interfaces | Molaei, Mehdi; Chisholm, Nicholas; Deng, Jiayi; Crocker, John; Stebe, Kathleen | We have developed a method to measure nanoscale flow fields around interfacially trapped colloidal particles undergoing pure Brownian motion. | Session 86: Rheology and Flow of Soft Materials |
| 1416 | Drying-induced nucleation patterns in confined hyperelastic hydrogels | Saintyves, Baudouin; Pic, Romain; Mahadevan, L.; Bischofberger, Irmgard | We propose a possible mechanism that sets the cavity size, where a balance between elastic and surface energy is expressed by a dimensionless elasto-capillary number. | Session 86: Rheology and Flow of Soft Materials |
| 1417 | Rheology of glassy and jamming emulsions | Cao, Cong; liao, jianshan; breedveld, victor; Weeks, Eric | We study the rheology of monodisperse and bidisperse emulsions with various droplet sizes (1 — 2 diameter). | Session 86: Rheology and Flow of Soft Materials |
| 1418 | Universal properties of creep flow in amorphous solids | Popovic, Marko; De Geus, Tom; JI, WENCHENG; Rosso, Alberto; Wyart, Matthieu | We propose that scaling properties of the creep flow are determined by its the steady state flow. | Session 86: Rheology and Flow of Soft Materials |
| 1419 | Using acoustic perturbations to tune bouncing on thickening cornstarch suspensions | Wang, Zhicheng; Ramaswamy, Meera; Sehgal, Prateek; Niu, Ran; Cohen, Itai | Here, we investigate whether acoustic perturbations are a viable strategy for unjamming suspensions under compression. | Session 86: Rheology and Flow of Soft Materials |
| 1420 | Elasticity in dense suspensions of geometrically frustrated colloids | Pradeep, Shravan; Wessel, Alan; Hsiao, Lilian | Elasticity in dense suspensions of geometrically frustrated colloids | Session 86: Rheology and Flow of Soft Materials |
| 1421 | Mechanics-based simulation of textiles | Rycroft, Christopher; Ding, Xiaoxiao | Here, we develop a high-performance code for simulating textiles at the level of individual yarns. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1422 | Linked loops on a lattice: Formulating knitted fabric elasticity with coarse-grained curve mechanics | Dimitriyev, Michael; Singal, Krishma; Matsumoto, Elisabetta | We explore this relationship between microstructure and macroscopic response by coarse-graining the yarn-level mechanics. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1423 | Quantifying the Elastic Nature of Knitted Materials | Singal, Krishma; Dimitriyev, Michael; Matsumoto, Elisabetta | We characterize the non-affine deformation of the fabrics by tracking a 5 by 5 grid of points while undergoing deformation. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1424 | A formal language for describing knitted textiles using swatches | Markande, Shashank; Matsumoto, Elisabetta | We propose such a framework, where the alphabet is composed of irreducible swatches — knitable textile knots and links — that can be concatenated leading to higher order or compound swatches. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1425 | Leveraging Temporal Constraints for Simplified Knit Representation | Lin, Jenny; McCann, James | To address this, our work seeks to leverage the temporal constraint inherent in the knitting process. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1426 | Tensional twist-folding and scrolling of sheets | Chopin, Julien; Kudrolli, Arshad | We will present a tensional twist-folding model that quantitatively explains the morphologies observed and associated mechanical response and can serve as a guide for fabrication of yarns with precise control of crosssectional architecture. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1427 | Designing Knitted Fabrics with Programmable Properties | Ding, Xiaoxiao; Rycroft, Christopher | We use this framework to systematically explore how the macroscopic mechanical properties of knitted fabrics depend on the knit topology. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1428 | Improving Fit on Clothing using Bent Seams | Campbell, Lewis; Delp, Kelly; Matsumoto, Elisabetta | Here we study the way seams made from complicated curves can distribute curvature more evenly across the entire garment. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1429 | Cohesion of a bird nest. | Godefroy, Theo; Andrade-Silva, Ignacio; Pouliquen, Olivier; Marthelot, Joel | Here we study an assembly of monodisperse flexible fibers. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1430 | Every mechanism in 2d generates an exotic space of soft modes | Czajkowski, Michael; Rocklin, Zeb | We introduce an illustrative new class of general mechanisms in lattices of corner-sharing quadrilaterals and use them to show that these modes are governed by a single second-order nonlinear differential equation which guarantees mechanical compatibility. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1431 | Knit architectures for sensing and actuation | Sanchez, Vanessa; Wood, Robert | Here we explore a candidate structure to program fluidic actuation and a candidate structure to improve resistive strain sensing sensitivity, both using alternative knit stitches. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1432 | A soft adaptive gripper for extremely small or flexible objects | Ahn, Uhsang; Ku, Subyeong; Park, Yong-Lae; Kim, Ho-Young | Here we present a soft, pneumatically-actuated gripper that exploits the buckling effect of an elastic membrane to either engulf sub-millimetric objects or pinch and separate flexible sheets from a stack. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1433 | Dual curvature control using pneumatic actuators | Jeong, Han Bi; Kim, Cheong San; Ha, Jonghyun; Lee, Seungjoo; Lee, Anna; Kim, Ho-Young | Here, we present a novel design strategy of Pneu-Nets to achieve complex forms (dual curvature) from a single channel with a single compartment. | Session 87: Textiles and topology: Sheets, Entanglement and Elasticity |
| 1434 | Acoustic probes for plasticity in amorphous materials | Tanguy, Anne; Lund, Fernando; Gravouil, Anthony; GIORDANO, VALENTINA; Luo, Haoming; Desmarchelier, Paul | We will discuss in this talk the signature of plasticity in acoustic scattering in amorphous materials. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1435 | Atomic nonaffinity as structural indicator of protocol-dependent plasticity in amorphous solids | Xu, Bin; Falk, Michael; Patinet, Sylvain; Guan, Pengfei | Based on a perturbation analysis of the potential energy landscape, we derive a new structural indicator, termed the atomic nonaffinity, which qualifies the contribution of an individual atom to the total nonaffine modulus. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1436 | Understanding The Degree of Cluster Expansions | Barroso-Luque, Luis; Ceder, Gerbrand | Notable extensions to include multi-lattice systems, and the use of new regression techniques have established the CE as a standard method in the computational study of multicomponent crystals. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1437 | Random-field Ising model criticality in glass-forming liquids | Guiselin, Benjamin; Berthier, Ludovic; Tarjus, Gilles | Combining umbrella sampling techniques with an extensive finite-size scaling analysis, we demonstrate the existence of a first-order transition line and of a random-field Ising model critical point in the thermodynamic limit [2]. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1438 | Field-induced freezing in the unfrustrated Ising antiferromagnet | Iaizzi, Adam | We study instantaneous quenches from infinite temperature to well below Tc in the two-dimensional (2D) square lattice Ising antiferromagnet in the presence of a longitudinal external magnetic field. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1439 | A scaling law describes the spin-glass response in theory, experiments and simulations | Paga, Ilaria; Zhai, Qiang; Baity-Jesi, Marco; Calore, Enrico; Gil-Narvion, Jose Miguel; Gordillo-Guerrero, Antonio; Iñiguez, David; Maiorano, Andrea; Marinari, Enzo; Martin-Mayor, Victor; Moreno-Gordo, Javier; Muñoz-Sudupe, Antonio; Navarro, Denis; Orbach, Raymond; Parisi, Giorgio; Perez-Gaviro, Sergio; Ricci-Tersenghi, Federico; Ruiz-Lorenzo, Juan Jesús; Schifano, Sebastiano Fabio; Seoane, Beatriz; Tarancon, Alfonso; Tripiccione, Raffaele; Yllanes, David; Cruz, Andrés; Fernández, Luis Antonio | We introduced a scaling law that describes the system’s response over its entire natural range of variation. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1440 | Temperature Chaos does exists in non-equilibrium spin-glass dynamics. | Moreno-Gordo, Javier; Baity-Jesi, Marco; Calore, Enrico; Cruz, Andrés; Fernández, Luis Antonio; Gil-Narvion, Jose Miguel; Gonzalez-Adalid, Isidoro; Gordillo-Guerrero, Antonio; Iñiguez, David; Maiorano, Andrea; Marinari, Enzo; Martin-Mayor, Victor; Muñoz-Sudupe, Antonio; Navarro, Denis; Paga, Ilaria; Parisi, Giorgio; Perez-Gaviro, Sergio; Ricci-Tersenghi, Federico; Ruiz-Lorenzo, Juan Jesús; Schifano, Sebastiano Fabio; Seoane, Beatriz; Tarancon, Alfonso; Tripiccione, Raffaele; Yllanes, David | I shall argue that an effect that closely mimics Temperature Chaos is, indeed, present in the non-equilibrium dynamics of a spin glass. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1441 | Analysis of two-level systems and mechanical loss of amorphous coatings by non-cage-breaking and cage-breaking transitions | Jiang, Jun; Mishkin, Alec; Prasai, Kiran; Zhang, Rui; Bassiri, Riccardo; Fejer, Martin; Cheng, Hai-Ping | 129, 164507 (2008)], the TLSs we find for pure and doped tantala can be separated into two groups named non-cage-breaking transitions and cage-breaking transitions. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1442 | Transverse Collective Modes of Supercooled Liquids Obtained from Stress and Current Correlators | Fullmer, Alexander; Eapen, Jacob | In this work, we employ atomistic simulations on model glass forming liquids to investigate the shear stress correlations and the attendant relaxation behavior. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1443 | Understanding the boson peak in glasses and glassy polymers | Zaccone, Alessio | We will show, using numerical simulations on polymer systems and metallic glasses, and theoretical arguments, that the boson peak is instead strongly temperature-dependent provided that one correctly accounts for the role of temperature and instantaneous normal modes in molecular simulations of glasses. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1444 | Characterizing the structure of the disordered micellar regime of asymmetric diblock copolymers using simulations | Chawla, Anshul; Bates, Frank; Dorfman, Kevin; Morse, David | In this work, we perform molecular dynamics simulations of a coarse-grained model to study the disordered micellar state of asymmetric diblock copolymers with a minority block volume fraction of 0.125. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1445 | A method for the accurate determination of basins of attraction of jammed packings | Suryadevara, Praharsh; Martiniani, Stefano | We use this new scheme to produce accurate projections of basins of attraction of Hertzian particles in 2 dimensions. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1446 | The effect of different cooling rates on two-level system distributions | Mishkin, Alec; Jiang, Jun; Zhang, Rui; Prasai, Kiran; Bassiri, Riccardo; Fejer, Martin; Cheng, Hai-Ping | In this talk, I will present results from atomic simulations aimed to understand this observation. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1447 | Dynamical caging and activation in random Lorentz gas model | Biroli, Giulio; Charbonneau, Patrick; Felona, Giampaolo; Hu, Yi; Zamponi, Francesco | Mean-field theory predicts that a dynamical (or mode-coupling) transition leads to particle caging and hence glass formation. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1448 | Ab initio study of density-dependent structure of amorphous strontium titanate (a-SrTiO3) | Bhattarai, Bishal; Zhuravlev, Ivan; Medvedeva, Julia | In this talk, we present a thorough ab initio-based study of a-STO explaining the existing discrepancy in the Ti coordination while validating both experiments. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1449 | First Principles Model of Amorphous ALD Deposited Al2O3 | Harper, Angela; Morris, Andrew | Through the use of ab initio molecular dynamics (AIMD) we develop a model for a-Al 2O 3 which is verified experimentally by both X-ray Absorption Spectroscopy (XAS) and solid-state Nuclear Magnetic Resonance (NMR). | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1450 | Calculated Raman Spectra for LIGO’s Coating Amorphous Oxides | Zhang, Rui; Jiang, Jun; Mishkin, Alec; Yazback, Maher; Prasai, Kiran; Bassiri, Riccardo; Fejer, Martin; Cheng, Hai-Ping | We calculate Raman spectra from a density functional approach for several amorphous oxides that are candidate optical coating materials for gravitational wave detection interferometers. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1451 | Hydrogen doping is wide-bandgap amorphous In-Ga-O semiconductors | Medvedeva, Julia; Bhattarai, Bishal | Hydrogen doping is wide-bandgap amorphous In-Ga-O semiconductors | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1452 | The connection between the density of Two-level systems and density of Quasi-localised modes in glasses | JI, WENCHENG | In this work, I theoretically build up the relationship between $n_0$ and the density of QLMs based on the soft-potential model. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1453 | Multiscale Modeling of Plasticity in Amorphous Solids: Machine Learning Constitutive Response | Falk, Michael; Alix-Williams, Darius; Hinkle, Adam; Giovanis, Dimitrios; Kontolati, Katiana; Rycroft, Christopher; Shields, Michael | We aim to develop multiscale models of plastic flow and failure processes in amorphous solids, materials that exhibit a complete lack of crystalline order. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1454 | Using Machine Learning Approaches to Predict Atomic-Scale Glass Failure in Environmental Conditions | Lloyd, Victoria; Lu, Sarah; Peña, Jorge; Song, Ray; Wang, Cora; Hardin, Thomas; Percus, Allon; Wilson, Mark | This project aims to use a recurrent neural network with the long-short term memory mechanism to learn the dynamic processes behind fracture nucleation and predict likely locations of fracture nuclei. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1455 | Collective and finite-size effects on local yield distributions in mesoscopic models of amorphous plasticity | Korchinski, Daniel; Ruscher, Céline; Rottler, Joerg | We connect these regimes to finite-size effects originating in the mechanical noise and the drift velocity. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1456 | Characterizing the mechanical response of metallic glasses using spring network models | Nawano, Aya; Schroers, Jan; Shattuck, Mark; O’Hern, Corey | To analyze and interpret this data, we developed a spring network model, where springs can break and reform based on atomic rearrangements. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1457 | Modeling shear band formation in amorphous solids using a structuro-elasto-plasticity (StEP) model | Xiao, Hongyi; Zhang, Ge; Ivancic, Robert; Yang, Entao; Riggleman, Robert; Liu, Andrea; Durian, Douglas | In this study, a newly developed structuro-elasto-plasticity (StEP) model is used to capture the essential physics for brittle response. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1458 | Anderson transition in three-dimensional systems with non-Hermitian disorder | Huang, Yi; Shklovskii, Boris | We study the Anderson transition for three-dimensional (3D) N×N×N tightly bound cubic lattices where both real and imaginary parts of on-site energies are independent random variables distributed uniformly between -W/2 and W/2. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1459 | Comparison of computational methods for predicting plastic activity in amorphous materials | Richard, David; Ozawa, Misaki; Patinet, Sylvain; Stanifer, Ethan; Shang, Baoshuang; Ridout, Sean; Xu, Bin; Zhang, Ge; Morse, Peter; BARRAT, Jean-Louis; Berthier, Ludovic; Falk, Michael; Guan, Pengfei; Liu, Andrea; Martens, Kirsten; Sastry, Srikanth; Vandembroucq, Damien; lerner, edan; Manning, M Lisa | In this study, we investigate plasticity in a model glass former driven via Athermal Quasistatic Shear. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1460 | The encoding of rejuvenation and memory effects in hierarchical energy landscapes | Rahman, Mahajabin; Boettcher, Stefan | We introduce a toy model, the cluster model, developed based on the idea that aging is governed by record dynamics (RD)[1] in which rare events of record size allow a system to overcome energetic or entropic barriers, before reconfiguring into the next metastable state. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1461 | Structuro-elasto-plasticity (StEP) model for plasticity in disordered solids | Zhang, Ge; Xiao, Hongyi; Ivancic, Robert; Yang, Entao; Riggleman, Robert; Durian, Douglas; Liu, Andrea | A phenomenological model capable of capturing and predicting these behaviors from microscopic properties and interactions has long been sought. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1462 | Critical behaviors of Anderson transitions driven by non-Hermitian disorders | Luo, Xunlong; Ohtsuki, Tomi; Shindou, Ryuichi | Here, we report the universal critical behaviors of Anderson transitions driven by non-Hermitian disorders in three-dimensional (3D) Anderson model [2] and 3D U(1) model, that belong to 3D class AI† and 3D class A in the 38 classes respectively. | Session 88: Understanding Glasses and Disordered Matter Through Computational Models |
| 1463 | Rheology of lyotropic liquid crystals obtained from self-assembly of amphiphilic block copolymer at water-oil interface | Qavi, Sahar; Foudazi, Reza | In this work, we study the rheological characteristics of a series of LLCs with lamellar, normal hexagonal, and reverse hexagonal structures. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1464 | Polymer Lung Surfactant: A Therapeutic Candidate for ARDS Developed via Polymer Physics Research | Won, You-Yeon | This talk will present accounts of our polymer physics research endeavors over the past several years that enabled the development of this first-in-class polymer lung surfactant therapy for ARDS treatment. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1465 | Inverse Design of Complex 3D Nanostructures of Block Copolymers | Huang, Hejin; Alexander-Katz, Alfredo | Here, we introduce a method based on self-directed self-assembly, that utilizes artificial intelligence tools for inverse design of aperiodic 3D nanostructures. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1466 | Degradation of Block Copolymer Films Confined in Elastic Media | Sayko, Ryan; Wang, Zilu; Becker, Matthew; Dobrynin, Andrey | We performed coarse-grained molecular dynamics simulations of swelling and degradation of glycine, valine, and phenylalanine-based poly(ester urea) copolymer films confined within polymer networks with different values of shear modulus. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1467 | Free and Grafted Polymer in Polymer Grafted Nanoparticle Solutions by Small Angle Neutron Scattering | Haque, Ashraful; Hamilton, Sara; Feric, Tony; Park, Ah-Hyung (Alissa); Dadmun, Mark | Here, we report the use of small-angle neutron scattering to probe the structure and dispersion of polymer grafted to SiO 2 nanoparticle in an aqueous solution with and without supporting electrolyte. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1468 | Microgels at interfaces behave as 2D elastic particles featuring reentrant melting | Camerin, Fabrizio; Gnan, Nicoletta; Ruiz Franco, José; Ninarello, Andrea; Rovigatti, Lorenzo; Zaccarelli, Emanuela | We show, by means of explicit solvent molecular dynamics simulations, that microgels at interfaces interact via a two-dimensional Hertzian potential, resembling simple elastic disks [3]. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1469 | Adsorption of block-copolymers on the surface of carbon nanotubes in organic solvent | Levin, Irena; Cohen, Yachin | This research characterizes the adsorption of block copolymers of the styrene-b-4-vinylpyridine family (S4VP) onto multi-walld CNTs (MWCNT) in N,N-dimethyl formamide (DMF), using cryogenic transmission electron microscopy (cryo-TEM) and small angle neutron scattering (SANS) measurements with contrast variation. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1470 | Effect of polymer topology on the structure and dynamics of homo and block copolymers in bulk solution and at Liquid/Liquid Interfaces | qian, kun; Tsige, Mesfin | Molecular dynamics simulations using a bead-spring model on representative block copolymer architectures in bulk and at liquid/liquid interfaces have been carried out. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1471 | Shape-Specified Model Polymer Nanoparticles via Copolymer Sequence Control | Tulsi, Davindra; Simmons, David | Here we employ molecular dynamics simulations to probe the relationship between sequence and molecular shape in model synthetic polymers. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1472 | In-situ hydrolysis of block copolymers at the water-oil interface | Chen, Zhan; Hu, Mingqiu; Smith, Darren; Li, Xindi; Rzayev, Javid; Russell, Thomas | In this work, a series of linear and bottlebrush block copolymers of poly(styrene- b-solketal methacrylate) (PS- b-PSM) have been used to investigate and in-situ hydrolysis, where the hydrophobic PSM block is converted into a hydrophilic glycerol monomethacrylate (PGM) block. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1473 | Exploring the influence of polymer structure on adsorption onto metal surfaces | O’Bryan, Christopher; Lee, Daeyeon; Composto, Russell | Here, we investigate the role of polymer structure on their adsorption behavior onto metal surfaces. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1474 | Effect of silicone surfactant on the CO2 bubble nucleation in polyol | Mantha, Sriteja; Chao, Huikuan; Ylitalo, Andrew; Fitzgibbons, Thomas; Zhou, Weijun; Ginzburg, Valeriy; Wang, Zhen-Gang | In this talk, using classical density functional theory models, we propose design principles for silicone surfactants and elucidate the mechanism through which they lead to foams with improved physical properties. | Session 89: Polymers and Block Copolymers at Interfaces |
| 1475 | 3-Dimensional Confined Assembly of Bottlebrush Block Copolymer in Emulsion Droplet | Kim, Eun Ji; Shin, Jaeman; Do, Taeyang; Lee, Gue Seon; Kim, Jeung Gon; Kim, Bumjoon | Here, we report a confined self-assembly of BBCPs in evaporative emulsions, where each block consisted of polystyrene (PS) and polylactide (PLA). | Session 89: Polymers and Block Copolymers at Interfaces |
| 1476 | Structure, dynamics, and phase behaviors of novel quasi-coacervate gel composites | Jia, Di; Muthukumar, Murugappan | Here we report a novel system where charged macromolecules can simply complex with oppositely charged monomers to induce phase separation. | Session 90: Polyelectrolyte Complexation |
| 1477 | Modeling phase behavior of polyelectrolyte complex coacervates using simulations | Bobbili, Sai Vineeth; Milner, Scott | We propose an idealized model and a simple simulation technique to investigate coacervate phase behavior. | Session 90: Polyelectrolyte Complexation |
| 1478 | Charge density and solvent effects on polyelectrolyte complexation | Tirrell, Matthew; Neitzel, Angelika; Meng, Siqi; Fang, Yan | Thhis talk will present our studies on changing the solvent quality and the linear charge density along the chains in such complexes. | Session 90: Polyelectrolyte Complexation |
| 1479 | Dynamics of Polyelectrolyte Complex Coacervates: A Molecular Dynamics Study | Liang, Heyi; Rumyantsev, Artem; Rauscher, Phillip; De Pablo, Juan | To solve this puzzle, we performed coarse-grained molecular dynamics simulations of PECCs with explicit solvent and analyzed the chain dynamics as a function of salt concentration. | Session 90: Polyelectrolyte Complexation |
| 1480 | Concentration and separation of proteins using polyion condensates | Lindhoud, Saskia | In this talk I will discuss two features of these polyion condensates which can be linked to the cellular condensates. | Session 90: Polyelectrolyte Complexation |
| 1481 | Biomacromolecules in Ternary Complex Coacervates | Blocher McTigue, Whitney; Hardy, Jeanne; Perry, Sarah | To combat this, methods for decreasing the reliance of these cargos on the cold chain have garnered attention, with many efforts focusing on encapsulation strategies. | Session 90: Polyelectrolyte Complexation |
| 1482 | Complexation of two oppositely charged Polyeletrolyte chains: Role of entropy and enthalpy | 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. | Session 90: Polyelectrolyte Complexation |
| 1483 | Associative Phase Separation in Polyelectrolyte Complex Coacervates | Ma, Yuanchi; Prabhu, Vivek; Ali, Samim; Mao, Yimin | We will show new static and dynamic light scattering and small-angle neutron scattering results and discuss how the correlation length, osmotic compressibility estimates from the scattered intensity to zero angle, and relaxation times change as the coexistence curve is approached by increasing temperature. | Session 90: Polyelectrolyte Complexation |
| 1484 | General trends in the structure and phase behaviour of polyelectrolyte-nanoparticle assemblies | Holkar, Advait; Toledo, Jesse; Srivastava, Samanvaya | In this presentation, we will delineate fundamental investigations into the phase behavior and structure of polyelectrolyte-NP assemblies using small angle X-ray scattering, turbidimetry and rheology with systematic variation of PE sizes and flexibility, NP sizes, and a wide range of concentrations of both components. | Session 90: Polyelectrolyte Complexation |
| 1485 | Random Copolymer Polyelectrolyte Complexes and the Role of Local Heterogeneity in Removing Organic Contaminants from Water | Wang, Jeremy; Waltmann, Curt; Noe Umana Kossio, Han; Olvera De La Cruz, Monica; Torkelson, John | Random Copolymer Polyelectrolyte Complexes and the Role of Local Heterogeneity in Removing Organic Contaminants from Water | Session 90: Polyelectrolyte Complexation |
| 1486 | Loop-in coacervation in non-stoichiometric polyelectrolyte mixtures | Friedowitz, Sean; Lou, Junzhe; Barker, Kayla; Xia, Yan; Qin, Jian | An asymptotic analysis in the low-salt regime shows that this loop-in behavior is caused by the osmotic pressure of the counterions confined in the coacervate due to electroneutrality, and that the effect is more prominent in solutions with stronger stoichiometric asymmetry. | Session 90: Polyelectrolyte Complexation |
| 1487 | The Density and Rôle of Ions in Polyelectrolyte Complex Coacervates | Schlenoff, Joseph; Yang, Mo; Digby, Zachary; Wang, Qifeng | This talk will cover a range of PEC/salt systems to illustrate a consistent picture for the rôle of ions in complexed polyelectrolytes. | Session 90: Polyelectrolyte Complexation |
| 1488 | A quartz crystal microbalance method of quantifying water-ion pair interactions in polyelectrolyte multilayers | Eneh, Chikaodinaka | In this talk, we discuss the influence of salt and polyelectrolyte on the water content of the PEM- specifically, the water associated with the polycation-polyanion (intrinsic) ion pairs, “ i”. | Session 90: Polyelectrolyte Complexation |
| 1489 | Molecular Mass Dependence of Interfacial Tension in Complex Coacervation | Audus, Debra; Ali, Samim; Rumyantsev, Artem; Ma, Yuanchi; De Pablo, Juan; Prabhu, Vivek | Subsequently, we derive the dependence and show that it is independent of the functional form of the non-ideal interactions assuming that (1) the concentration of polymer is the supernatant is negligible, a good assumption far from the critical point, and (2) that the non-ideal interactions have no explicit molecular mass dependence. | Session 90: Polyelectrolyte Complexation |
| 1490 | Wetting Behavior of Complex Coacervates | Balzer, Christopher; Zhang, Pengfei; Wang, Zhen-Gang | We analyze the wetting transition in systems where the polyelectrolyte adsorption is driven by electrostatic (electrowetting) and by nonelectrostatic forces (i.e. hydrogen bonding, hydrophobicity, coordination, etc.). | Session 90: Polyelectrolyte Complexation |
| 1491 | Temperature, water, and ion-pairing effects in polyelectrolyte complexes and multilayers | Lutkenhaus, Jodie; Sammalkorpi, Maria; Batys, Piotr | This talk will discuss how the glass transition temperature and rheological properties relate to intrinsic ion pairing. | Session 90: Polyelectrolyte Complexation |
| 1492 | Physical property scaling relationships for polyelectrolyte complex micelles 8.5.1 | Marras, Alexander; Vieregg, Jeffrey; Tirrell, Matthew | In this work, we use small angle x-ray scattering, light scattering, and electron microscopy to determine scaling behaviors of micelle shape, size, and stability for commonly used polyelectrolytes. | Session 90: Polyelectrolyte Complexation |
| 1493 | Molecular Exchange Kinetics in Complex Coacervate Core Micelles | Heo, Taeyoung; Choi, SooHyung | In this study, we investigated the equilibrium exchange dynamics of C3Ms characterized by time-resolved small-angle neutron scattering (TR-SANS). | Session 90: Polyelectrolyte Complexation |
| 1494 | Relaxation Dynamics in Complex Coacervate Hydrogels Formed by ABA Triblock Copolymers | Kim, Seyoung; Kim, Jung-Min; Heo, Taeyoung; Choi, SooHyung | We investigate the relaxation dynamics of the hydrogels as a function of salt concentration, accompanied by the structural characterizations. | Session 90: Polyelectrolyte Complexation |
| 1495 | Complex coacervation of polymerized ionic liquids in non-aqueous solvents | Lee, Minjung; Hayward, Ryan | This study provides insight into the effect of low dielectric solvents on complex coacervation, which has not been widely studied due to the limited solubility of most polyelectrolytes in these media. | Session 90: Polyelectrolyte Complexation |
| 1496 | Electrostatic Correlations Based on Increasing Bjerrum Length with Temperature Sufficient to Model Lower Critical Solution Temperature in Polyelectrolyte Complex Coacervates | Ylitalo, Andrew; Balzer, Christopher; Zhang, Pengfei; Wang, Zhen-Gang | Here, we show that electrostatic correlations based on a Bjerrum length that increases with temperature is sufficient to model LCST in a symmetric polyelectrolyte and salt solution, using both Voorn-Overbeek and a liquid state theory. | Session 90: Polyelectrolyte Complexation |
| 1497 | Emulsion macrophase transfer for stabilizing membraneless polyelectrolyte complex coacervate droplets | Agrawal, Aman; Hernandez, Rony; Douglas, Jack; Karim, Alamgir | In this experimental work, we explored the interfacial properties of membraneless polyelectrolyte complex coacervate droplets prepared in a controlled saline environment via emulsion macrophase transfer. | Session 90: Polyelectrolyte Complexation |
| 1498 | Processing Dependence of Polyelectrolyte Complex Microstructure | Edwards, Chelsea; Lakkis, Kareem; Helgeson, Matthew | Here, we investigate the mechanism of polyelectrolyte complex (PEC) growth and its sensitivity to flow processing. | Session 90: Polyelectrolyte Complexation |
| 1499 | Hybrid Electrostatic-Covalent Hydrogels | Li, Defu; Göckler, Tobias; Srivastava, Samanvaya | In this presentation, we will discuss our investigations on hybrid hydrogels comprising interpenetrating PEC and covalent networks. | Session 90: Polyelectrolyte Complexation |
| 1500 | Controlling topological defects within achiral and chiral nematics using surface geometry and anchoring | Tran, Lisa | In this talk, I will present two systems that demonstrate the use of boundary geometry to control defects. | Session 91: Topological Defects in 3D Active and Equilibrium Nematics |
| 1501 | Flows in 3D active nematic systems | Baskaran, Aparna | In this talk, I will illustrate this fact in the context of the linearized hydrodynamic equations and numerical solutions of the full hydrodynamic theory in channel geometries. | Session 91: Topological Defects in 3D Active and Equilibrium Nematics |
| 1502 | Geometry and mechanics of disclination lines in 3D nematic liquid crystals | Selinger, Jonathan | Based on this analysis, we construct a vector to represent the orientation of the disclination, as well as tensors to represent higher-order structure. | Session 91: Topological Defects in 3D Active and Equilibrium Nematics |
| 1503 | Dynamics of Active Defect Loops | Alexander, Gareth | We describe the flows and morphological dynamics of topological defect lines and loops in three-dimensional active nematics and show, using theory and numerical modeling, that they are governed by the local profile of the orientational order surrounding the defects. | Session 91: Topological Defects in 3D Active and Equilibrium Nematics |
| 1504 | Topological structure and dynamics of three-dimensional active nematics | Duclos, Guillaume | Our work suggests a framework for analyzing the nonequilibrium dynamics of bulk anisotropic systems as diverse as driven complex fluids, active metamaterials, biological tissues, and collections of robots or organisms. | Session 91: Topological Defects in 3D Active and Equilibrium Nematics |
| 1505 | Electrically Programmable Micro-scale Morphing Robots Based on Mechanical Metamaterials | Liu, Qingkun; Wang, Wei; Sinhmar, Himani; Cortese, Alejandro; Griniasty, Itay; Reynolds, Michael; Taghavi, Milad; Apsel, Alyssa; Kress-Gazit, Hadas; McEuen, Paul; Cohen, Itai | Here, we show that such electrically actuated auxetic metamaterials can be utilized to design micro-scale robots. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1506 | Origami-inspired, high energy-density, low-voltage voice coil actuators for autonomous micro-robotic applications | Eligar, Sagar Shashikant; Hari Prasad, Hari Krishna; Jayaram, Kaushik | Preliminary modeling and experimental results show that our prototype (1.4cm in dimension), using a 3.175mm cubical N52 magnet produces about 50 times its body weight as static Lorenz force on a 41AWG, 46-turn, 4.75 mm diameter tightly wound coil with a constant input current of 0.1 A. Using impedance control, we propose to demonstrate various single-legged high-frequency hopping behaviors. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1507 | Robust Control for Robots via Minimal-Information Policies | Pacelli, Vincent; Majumdar, Anirudha | This study investigates a fundamental trade-off between a robot’s state information usage and optimal decision making. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1508 | Hierarchical control in sea star inspired locomotion | Heydari, Sina; Po, Theodora; McHenry, Matthew; Kanso, Eva | We developed mathematical models of the biomechanics of the tube feet and the sea star body. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1509 | Rock-and-Walk Manipulation: Robotic Object Transport through Passive Dynamic and Quasistatic Manipulation | Nazir, Syed; Xu, Pu; Seo, Jungwon | We present a novel robotic manipulation capability for transporting an object on the ground in a dynamic and nonprehensile manner. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1510 | Wing opening and leg flailing together facilitates strenuous self-righting on the ground | Othayoth Mullankandy, Ratan Sadanand; Li, Chen | Here, we studied whether simultaneous wing opening and leg flailing is beneficial. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1511 | Bio-inspired mask filters with breathing resistance control | Yuk, Jisoo; Frohlich, Karl; Connor, Robert; Basu, Saikat; Chamorro, Leonardo; Jung, Sunghwan | In this study, we proposed a 3D tortuous mask filter inspired by animal’s nasal cavity. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1512 | From Particles to Parts: Building Artificial Life from Soft Multifunctional Materials | Kramer-Bottiglio, Rebecca | During this talk, I will present recent work toward particulate and fibrous composites that address distributed sensing, variable stiffness properties, and variable trajectory motions inspired by these capabilities in animals. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1513 | Independent Control of Microrobots using Q-learning framework | Aslam, Zain; Beaver, Logan; Malikopoulos, Andreas; Das, Sambeeta | In this talk, we present the first foundational step towards realizing this objective by developing a Q-learning-based controller which approximately optimizes the trajectories of the microrobots through rewards and discounts while avoiding obstacles, such as randomly dispersed micro-objects, or already formed microstructures. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1514 | Interfacial pumping inspired by snails | Pandey, Anupam; Sequeira, Yohan; Wang, Emily; Yuk, Jisoo; Lee, Sungyon; Takagi, Daisuke; Jung, Sunghwan | We observe that floating particles far away are sucked into the robotic snail. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1515 | Characterizing The Marangoni effect in NASA STDCE-1 experiments | sequeira, yohan; Jung, Sunghwan | We utilize multiple Particle Image Velocimetry and Particle Tracking Velocimetry methods to extract the flow field form NASA STDCE-1 videos and compare the experimental data to the numerical results of the flow-field. | Session 92: Robophysics: Robotics Meets Physics: Actuation, Control, Design |
| 1516 | Attractoring-based locomotion | Sándor, Bulcsú; Nowak, Michael; Gros, Claudius | To illustrate these control schemes, we present a simple model of an actuator controlled by a rate encoding neuron with internal adaption and with inputs representing self-coupling, respectively delayed proprioceptive feedback. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1517 | Force-chain evolution in granular packings under a razor-clam inspired penetration | Huang, Sichuan; Tao, Junliang | Here we investigate how the shell opening facilitates the soil burrowing of razor clams using a clam-inspired penetrator and photoelasticity. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1518 | Better Stair Climbing By Using Symmetry | Bishop, Arun; Revzen, Shai | Instead, we construct a solution based on understanding of the problem’s symmetries. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1519 | Morphological compliance enables robot locomotion through cluttered terrain | Kabutz, Heiko; Jayaram, Kaushik | We propose to extend this idea by hypothesizing that soft bodied animals and robots could employ an alternate yet equally effective strategy relying on their distributed body compliance to squeeze through cluttered obstacles. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1520 | Testing whether potential energy landscape can predict stochastic obstacle traversal | Zheng, Bokun; Xuan, Qihan; Li, Chen | Our recent study established a quasi-static potential energy landscape approach to locomotor transitions (Othayoth, Thoms, Li, 2020, PNAS). | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1521 | A potential energy landscape based dynamic model of locomotion in complex 3-D terrain | Xuan, Qihan; Li, Chen | Because it is challenging to calculate torques of conservative forces from energy landscape gradient using Euler angles, we used virtual rotation to calculate them. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1522 | A robophysical model to study physical sensing of obstacles in legged traversal of complex 3-D terrain | Wang, Yaqing; Othayoth Mullankandy, Ratan Sadanand; Li, Chen | To study this, we developed a robophysical model with actuated flexible head and abdomen and underactuated body pitch and roll control which mimicked the effect of leg motions. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1523 | Landing Energy Management | Gart, Sean; Kessens, Chad; Pusey, Jason; Nicholson, John; Koditschek, Daniel | In this study, we investigate the role of leg springs and dampers, body orientation, and geometry on landing energy management. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1524 | Simple untethered flagellated robot in fluids and granular media | Du, Yayun; Miller, Andrew; Khalid Jawed, Mohammad | We report a simple untethered flagellated robot that can swim in both granular media and fluids at low Reynolds number. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1525 | Parapodia inspired soft appendages enable robot propulsion in granular media | Chopra, Shivam; Jadhav, Saurabh; Tolley, Michael; Gravish, Nick | We present experimental results where the appendage is oscillated in a controlled granular environment and show that propulsion is highly dependent on the bending stiffness, increasing with the increase in stiffness until it reaches a maximum value and then starts decreasing. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1526 | Bioinspired Embodied Control of Locomotion in Complex Environments | Full, Robert | In turn, robophysics approach to biological locomotion can inspire the design of novel robots and applied mathematics. | Session 93: Robophysics: Robotics Meets Physics: Complex Environment |
| 1527 | Biomimetic navigation of complex environments | Vergassola, Massimo | Biomimetic navigation of complex environments | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1528 | Excitable spring-wing dynamics 1: Common dynamics and transitions between synchronous and asynchronous insect flight. | Gau, Jeffrey; Lynch, James; Gravish, Nick; Sponberg, Simon | To address how discrete oscillatory behavior emerges from a continuum of actuator properties, we combined the two types of actuation with a resonant spring-wing mechanics model. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1529 | Excitable Spring-Wing Dynamics 2: Synchronous and asynchronous regimes of actuation in robophysical spring-wing systems | Lynch, James; Gau, Jeffrey; Sponberg, Simon; Gravish, Nick | In this talk, we detail the construction and implementation of a self-excited spring-wing model based on measurements of insect muscle response. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1530 | Excitable spring-wing dynamics 3: The dynamics of asynchronous actuation and emergent spring-wing oscillations | Gravish, Nick; Lynch, James; Gau, Jeffrey; Sponberg, Simon | Overall in this talk we will establish the rules of dSA oscillations in a model system of asynchronous spring-wing systems. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1531 | Insect-like flying robots | Jafferis, Noah; Wood, Robert | In this talk we will describe several advances for the Harvard “RoboBee” platform (an 80-mg flapping-wing vehicle) over the past five years that are bringing this goal closer to reality, including non-linear resonance modeling, multi-wing designs, and scaling analysis. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1532 | Active vision improves sensory acquisition and coordinates motor control in insect flight | Cellini, Benjamin; Mongeau, Jean-Michel | We studied how flying fruit flies overcome these challenges by actively controlling their head to shape the visual inputs that are sensed by the eyes. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1533 | Two DOF underactuated swimming robot with high maneuverability and passive adaptability | Liu, Bangyuan; Hammond III, Frank | Upon that premise, we designed a bioinspired two DOF soft swimming robot with high maneuverability and passive adaptability to obstacles. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1534 | Unique ‘figure-of-8’ swimming style provides a new idea for robot design: rotation is important for swimming. | Jin, Bowen; Luo, Haoxiang; Ding, Yang | We use a 3D model combining with computational fluid dynamics to study the kinematics and dynamics of larval locomotion and found that larva not only moves forward but also rotates its body around the center of mass. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1535 | Minimal robophysical model for multi-flagellate propulsion | Diaz, Kelimar; Robinson, Tommie; Ozkan-Aydin, Yasemin; Goldman, Daniel; Wan, Kirsty | Here to test if these performance differences are a sole function of the diverse gaits (appendage coordination patterns) employed by different species, we developed a macroscopic robophysical model (four appendages, body length of 3.9 cm) with the capability to self-propel in a viscous fluid (mineral oil, 1,000 cSt). | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1536 | Electrically actuated artificial cilia for microfluidic applications | Wang, Wei; Liu, Qingkun; Reynolds, Micheael; Miskin, Marc; McEuen, Paul; Cohen, Itai | Here, we present a new platform for fabricating artificial cilia that uses surface electrochemical actuators made of nm thin Platinum films. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |
| 1537 | Effect of kinematics and physical properties of caudal fin on performance of a robotic fish | Nayak, Anshul; Pendar, Hodjat | In this work, we built a Robo-physical model to study the effect of various physical, geometrical, and kinematic parameters of fin on performance. | Session 94: Robophysics: Robotics Meets Physics: Flight & Swimming |