194 citations · 1.7k across the 32 of their papers we have counts for
24 papers · 1 filter
Theory of the center-of-mass diffusion and viscosity of microstructured and variable sequence copolymer liquids
Guang Shi, Kenneth S. Schweizer
Biomolecular condensates formed through the phase separation of proteins and nucleic acids are widely observed, offering a fundamental means of organizing intracellular materials i…
Simulation Study of the Effects of Polymer Network Dynamics and Mesh Confinement on the Diffusion and Structural Relaxation of Penetrants
Tsai-Wei Lin, Baicheng Mei, Kenneth S. Schweizer +1
The diffusion of small molecular penetrants through polymeric materials represents an important fundamental problem, relevant to the design of materials for applications such as co…
Self-Consistent Hopping Theory of Activated Relaxation and Diffusion of Dilute Penetrants in Dense Crosslinked Polymer Networks
Baicheng Mei, Tsai-Wei Lin, Charles E. Sing +1
We generalize and apply a microscopic force-level statistical mechanical theory of the activated dynamics of dilute spherical penetrants in glass-forming liquids to study the influ…
How Segmental Dynamics and Mesh Confinement Determine the Selective Diffusivity of Molecules in Crosslinked Dense Polymer Networks
Baicheng Mei, Tsai-Wei Lin, Grant S. Sheridan +3
The diffusion of molecules (penetrants) of variable size, shape, and chemistry through dense crosslinked polymer networks is a fundamental scientific problem that is broadly releva…
Microscopic Activated Dynamics Theory of the Shear Rheology and Stress Overshoot in Ultra-Dense Glass-Forming Fluids and Colloidal Suspensions
Ashesh Ghosh, Kenneth S. Schweizer
We formulate a microscopic, force-level, activated dynamics-based statistical-mechanical theory for the continuous startup nonlinear shear-rheology of ultra-dense glass-forming har…
Linear and Nonlinear Viscoelasticity of Concentrated Thermoresponsive Microgel Suspensions
Gaurav Chaudhary, Ashesh Ghosh, Jin Gu Kang +3
This is an integrated experimental and theoretical study of the dynamics and rheology of self-crosslinked, slightly charged, temperature responsive soft Poly(N-isopropylacrylamide)…
The Role of Collective Elasticity on Activated Structural Relaxation, Yielding and Steady State Flow in Hard Sphere Fluids and Colloidal Suspensions Under Strong Deformation
Ashesh Ghosh, Kenneth S. Schweizer
We theoretically study the effect of external deformation on activated structural relaxation and elementary aspects of the nonlinear mechanical response of glassy hard sphere fluid…
Microscopic Theory of Onset of De-Caging and Bond Breaking Activated Dynamics in Ultra-Dense Fluids with Strong Short Range Attractions
Ashesh Ghosh, Kenneth S. Schweizer
We theoretically study thermally activated elementary dynamical processes that precede full structural relaxation in ultra-dense particle liquids interacting via strong short range…
Microscopic Theory of the Influence of Strong Attractive Forces on the Activated Dynamics of Dense Glass and Gel Forming Fluids
Ashesh Ghosh, Kenneth S. Schweizer
We theoretically study the non-monotonic (re-entrant) activated dynamics associated with a repulsive glass to fluid to attractive glass transition in high density particle suspensi…
Influence of Longer Range Transfer of Vapor Interface Modified Caging Constraints on the Spatially Heterogeneous Dynamics of Glass-Forming Liquids
Anh D. Phan, Kenneth S. Schweizer
Based on the Elastically Collective Nonlinear Langevin Equation theory of bulk relaxation in glass-forming liquids, and our recent ideas of how interface-nucleated modification of…
Theory of the Spatial Transfer of Interface-Nucleated Changes of Dynamical Constraints and Its Consequences in Glass-Forming Films
Anh D. Phan, Kenneth S. Schweizer
We formulate a new theory for how caging constraints in glass-forming liquids at a surface or interface are modified and then spatially transferred, in a layer-by-layer bootstrappe…
Thermoresponsive stiffening with microgel particles in a semiflexible fibrin network
Gaurav Chaudhary, Ashesh Ghosh, Ashwin Bhardwaj +4
We report temperature-responsive soft composites of semiflexible biopolymer networks (fibrin) containing dispersed microgel colloidal particles of poly(N-isopropylacrylamide) (pNIP…
Linear and Nonlinear Rheology and Structural Relaxation in Dense Glassy and Jammed Soft Repulsive Microgel Suspensions
Ashesh Ghosh, Gaurav Chaudhary, Jin Gu Kang +3
We present an integrated experimental and quantitative theoretical study of the mechanics of self-crosslinked, neutral, repulsive pNIPAM microgel suspensions over concentration (c)…
Dynamic Gradients, Mobile Layers, Tg Shifts, Role of Vitrification Criterion and Inhomogeneous Decoupling in Free-Standing Polymer Films
Anh D. Phan, Kenneth S. Schweizer
The force-level Elastically Collective Nonlinear Langevin Equation theory of activated relaxation in glass-forming free-standing thin films is re-visited to improve its treatment o…
Elastically Collective Nonlinear Langevin Equation Theory of Dynamics in Glass-Forming Liquids: Transient Localization, Thermodynamic Mapping and Cooperativity
Anh D. Phan, Kenneth S. Schweizer
We analyze multiple new issues concerning activated relaxation in glassy hard sphere fluids and molecular and polymer liquids based on the Elastically Collective Nonlinear Langevin…
Theory of Activated Glassy Dynamics in Randomly Pinned Fluids
Anh D. Phan, Kenneth S. Schweizer
We generalize the force-level, microscopic, Nonlinear Langevin Equation (NLE) theory and its elastically collective generalization (ECNLE theory) of activated dynamics in bulk sphe…
Segment-Scale, Force-Level Theory of Mesoscopic Dynamic Localization and Entropic Elasticity in Entangled Chain Polymer Liquids
Zachary E. Dell, Kenneth S. Schweizer
We develop a segment-scale, force-based theory for the breakdown of the unentangled Rouse model and subsequent emergence of isotropic mesoscopic localization and entropic elasticit…
A Force-Level Theory of the Rheology of Entangled Rod and Chain Polymer Liquids. I. Tube Deformation, Microscopic Yielding and the Nonlinear Elastic Limit
Kenneth S. Schweizer, Daniel M. Sussman
We employ a first principles, force-level approach to self-consistently construct the anharmonic tube confinement field for entangled fluids of rigid needles and for primitive-path…
Correlation between Fragility and the Arrhenius Crossover Phenomenon in Metallic, Molecular, and Network Liquids
Abhishek Jaiswal, Takeshi Egami, K. F. Kelton +2
We report the observation of a distinct correlation between the kinetic fragility index and the reduced Arrhenius crossover temperature in various glass-forming…
Slow Relaxation, Spatial Mobility Gradients and Vitrification in Confined Films
Stephen Mirigian, Kenneth S. Schweizer
Two decades of experimental research indicates that spatial confinement of glass-forming molecular and polymeric liquids results in major changes of their slow dynamics beginning a…
Unified Theory of Activated Relaxation in Liquids over 14 Decades in Time
Stephen Mirigian, Kenneth S. Schweizer
We formulate a predictive theory at the level of forces of activated relaxation in hard sphere fluids and thermal liquids that covers in a unified manner the apparent Arrhenius, cr…
Structure of Colloid-Polymer Suspensions
Matthias Fuchs, Kenneth S. Schweizer
We discuss structural correlations in mixtures of free polymer and colloidal particles based on a microscopic, 2-component liquid state integral equation theory. Whereas in the cas…
Macromolecular theory of solvation and structure in mixtures of colloids and polymers
M. Fuchs, K. S. Schweizer
The structural and thermodynamic properties of mixtures of colloidal spheres and non-adsorbing polymer chains are studied within a novel general two-component macromolecular liquid…
Structure and thermodynamics of colloid-polymer mixtures: a macromolecular approach
M. Fuchs, K. S. Schweizer
The change of the structure of concentrated colloidal suspensions upon addition of non-adsorbing polymer is studied within a two-component, Ornstein-Zernicke based liquid state app…