60 citations · 174 across the 21 of their papers we have counts for
22 papers
Surface Block Identity Controls Transport of Symmetric Diblock Copolymer Through Nanopores
Sang Yup Lee, Tae-Young Heo, Uiseok Hwang +4
Understanding how polymer architecture governs transport through nanopores is essential for nanocomposite fabrication, membrane design, and polymer upcycling. However, the effect o…
Thermally activated dynamics of annealed glasses near the yielding transition under cyclic shear
Ian R Graham, Paulo E Arratia, Robert A Riggleman
While experiments and simulations have provided a rich picture of the dynamic heterogeneity in glasses at constant temperature or under steady shear, the dynamics of glasses under…
The effects of dynamic binding on the phase behaviour and properties of polymer blends undergoing complex coacervation
Zuzanna M. Jedlinska, Robert A. Riggleman
Associative polymer networks have shown a major promise in fabrication of self-healing and responsive materials. The can also serve as simple models to study more complex biologica…
Predicting failure locations in model end-linked polymer networks
Han Zhang, Robert A. Riggleman
The fracture of end-linked polymer networks and gels has a significant impact on the performance of these versatile and widely used materials, and a molecular-level understanding o…
Machine learning-informed structuro-elastoplasticity predicts ductility of disordered solids
Hongyi Xiao, Ge Zhang, Entao Yang +5
All solids yield under sufficiently high mechanical loads. Below yield, the mechanical responses of all disordered solids are nearly alike, but above yield every different disorder…
MATILDA.FT, a Mesoscale Simulation Package for Inhomogeneous Soft Matter
Zuzanna M. Jedlinska, Christian Tabedzki, Colin Gillespie +3
In this paper we announce the public release of a massively-parallel, GPU-accelerated software, which is the first to combine both coarse-grained molecular dynamics and field-theor…
Exploring the Relationship Between Softness and Excess Entropy in Glass-forming Systems
Ian R. Graham, Paulo E. Arratia, Robert A. Riggleman
We explore the relationship between a machine-learned structural quantity (softness) and excess entropy in simulations of supercooled liquids. Excess entropy is known to scale well…
Slow Relaxation and Landscape-Driven Dynamics in Viscous Ripening Foams
Amruthesh Thirumalaiswamy, Clary Rodríguez-Cruz, Robert A. Riggleman +1
Foams and dense emulsions display complex mechanical behavior, including intermittent rearrangement dynamics, power-law rheology, and slow recovery after perturbation. These effect…
Bicontinuous interfacially jammed emulsion gels with nearly uniform sub-micrometer domains via regulated co-solvent removal
Tiancheng Wang, Robert A. Riggleman, Daeyeon Lee +1
Porous materials possess numerous useful functions because of their high surface area and ability to modulate the transport of heat, mass, fluids, and electromagnetic waves. Unlike…
Experimental observations of fractal landscape dynamics in a dense emulsion
Clary Rodriguez-Cruz, Mehdi Molaei, Amruthesh Thirumalaiswamy +6
Many soft and biological materials display so-called 'soft glassy' dynamics; their constituents undergo anomalous random motions and complex cooperative rearrangements. A recent si…
Structuro-elasto-plasticity (StEP) model for plasticity in disordered solids
Ge Zhang, Hongyi Xiao, Entao Yang +5
Elastoplastic lattice models for the response of solids to deformation typically incorporate structure only implicitly via a local yield strain that is assigned to each site. Howev…
Understanding Creep Suppression Mechanism in Polymer Nanocomposites through Machine Learning
Entao Yang, James F. Pressly, Bharath Natarajan +3
While recent efforts have shown how local structure plays an essential role in the dynamic heterogeneity of homogeneous glass-forming materials, systems containing interfaces such…
Exploring canyons in glassy energy landscapes using metadynamics
Amruthesh Thirumalaiswamy, Robert A. Riggleman, John C. Crocker
The complex physics of glass forming systems is controlled by the structure of the low energy portions of their potential energy landscapes. Here, we report that a modified metadyn…
Predicting the unobserved: a statistical mechanics framework for non-equilibrium material response with quantified uncertainty
Shenglin Huang, Ian R. Graham, Robert A. Riggleman +3
Can far-from-equilibrium material response under arbitrary loading be inferred from equilibrium data and vice versa? Can the effect of element transmutation on mechanical behavior…
The Role of Local Structure in the Enhanced Dynamics of Deformed Glasses
Entao Yang, Robert A. Riggleman
External stress can accelerate molecular mobility of amorphous solids by several orders of magnitude. The changes in mobility are commonly interpreted through the Eyring model, whi…
The origin of mechanical enhancement in polymer nanoparticle composites with ultra-high nanoparticle loading
Emily Y. Lin, Amalie L. Frischknecht, Robert A. Riggleman
Polymer nanoparticle composites (PNC) with ultra high loading of nanoparticles (> 50%) have been shown to exhibit markedly improved strength, stiffness, and toughness simultaneousl…
Distinguishing failure modes at the molecular level by examining heterogeneity in local structures and dynamics
Emily Y. Lin, Robert A. Riggleman
Brittle failure is ubiquitous in amorphous materials that are sufficiently cooled below their glass transition temperature, . This catastrophic failure mode is limiting for am…
Effects of Microstructure Formation on the Stability of Vapor Deposited Glasses
Alex R. Moore, Patrick J. Walsh, Zahra Fakhraai +1
Glasses formed by physical vapor deposition (PVD) are an interesting new class of materials, exhibiting properties thought to be equivalent to those of glasses aged for thousands o…
Identifying structural signatures of shear banding in model polymer nanopillars
Robert J. S. Ivancic, Robert A. Riggleman
Amorphous solids are critical in the design and production of nanoscale devices, but under strong confinement these materials exhibit changes in their mechanical properties which a…
Bond Stiffness, not Chain Length, Dictates Polymer Infiltration into Nanopores
David J. Ring, Robert A. Riggleman, Daeyeon Lee
We study the effect of physical confinement on the capillary infiltration of polymers into cylindrical nanopores using molecular dynamics simulations. In particular, we probe wheth…
Length Scale of Correlated Dynamics in Ultra-thin Molecular Glasses
Yue Zhang, Ethan Glor, Mu Li +5
Physical vapor deposition (PVD) is widely used in manufacturing ultra-thin layers of amorphous organic solids. Here, we demonstrate that these films exhibit a sharp transition from…
Understanding plastic deformation in thermal glasses from single-soft-spot dynamics
Samuel S. Schoenholz, Andrea J. Liu, Robert A. Riggleman +1
By considering the low-frequency vibrational modes of amorphous solids, Manning and Liu [Phys. Rev. Lett. 107, 108302 (2011)] showed that a population of "soft spots" can be identi…