410 citations · 1.3k across the 30 of their papers we have counts for
18 papers · 1 filter
Mechanics of fiber networks under a bulk strain
Sadjad Arzash, Abhinav Sharma, Fred C. MacKintosh
Biopolymer networks are common in biological systems from the cytoskeleton of individual cells to collagen in the extracellular matrix. The mechanics of these systems under applied…
Active chiral molecules in activity gradients
Pietro Luigi Muzzeddu, Hidde Derk Vuijk, Hartmut Lowen +2
While the behavior of active colloidal molecules is well studied by now for a constant activity, the effect of activity gradients is much less understood. Here we explore one of th…
Active Colloidal Molecules in Activity Gradients
Hidde D. Vuijk, Sophie Klempahn, Holger Merlitz +2
We consider a rigid assembly of two active Brownian particles, forming an active colloidal dimer, in a gradient of activity. We show analytically that depending on the relative ori…
Strain-controlled critical slowing down in the rheology of disordered networks
Jordan L. Shivers, Abhinav Sharma, Fred C. MacKintosh
Networks and dense suspensions frequently reside near a boundary between soft (or fluid-like) and rigid (or solid-like) regimes. Transitions between these regimes can be driven by…
Chemotaxis of cargo-carrying self-propelled particles
Hidde D. Vuijk, Holger Merlitz, Michael Lang +2
Active particles with their characteristic feature of self-propulsion are regarded as the simplest models for motility in living systems. The accumulation of active particles in lo…
Stress-stabilized sub-isostatic fiber networks in a rope-like limit
Sadjad Arzash, Jordan L. Shivers, Albert J. Licup +2
The mechanics of disordered fibrous networks such as those that make up the extracellular matrix are strongly dependent on the local connectivity or coordination number. For biopol…
Anomalous fluxes in overdamped Brownian dynamics with Lorentz force
Hidde Derk Vuijk, Joseph Michael Brader, Abhinav Sharma
We study the stochastic motion of a particle subject to spatially varying Lorentz force in the small-mass limit. The limiting procedure yields an additional drift term in the overd…
Effect of anisotropic diffusion on spinodal decomposition
Hidde Derk Vuijk, Joseph Michael Brader, Abhinav Sharma
We study the phase transition dynamics of a fluid system in which the particles diffuse anisotropically in space. The motivation to study such a situation is provided by systems of…
Scaling theory for mechanical critical behavior in fiber networks
Jordan Shivers, Sadjad Arzash, Abhinav Sharma +1
As a function of connectivity, spring networks exhibit a critical transition between floppy and rigid phases at an isostatic threshold. For connectivity below this threshold, fiber…
Linear response approach to active Brownian particles in time-varying activity fields
Holger Merlitz, Hidde Vuijk, Joseph Brader +2
In a theoretical and simulation study, active Brownian particles (ABPs) in three-dimensional bulk systems are exposed to time-varying sinusoidal activity waves that are running thr…
Isotropic-nematic transition of self-propelled rods in three dimensions
Matthias C. Bott, Felix Winterhalter, Matthieu Marechal +3
Using overdamped Brownian dynamics simulations we investigate the isotropic-nematic (IN) transition of self-propelled rods in three spatial dimensions. For two well-known model sys…
Pseudochemotaxis in inhomogeneous active Brownian systems
Hidde Vuijk, Abhinav Sharma, Debasish Mondal +2
We study dynamical properties of confined, self-propelled Brownian particles in an inhomogeneous activity profile. Using Brownian dynamics simulations, we calculate the probability…
Effective equilibrium states in mixtures of active particles driven by colored noise
René Wittmann, Joseph M. Brader, Abhinav Sharma +1
We consider the steady-state behavior of pairs of active particles having different persistence times and diffusivities. To this purpose we employ the active Ornstein-Uhlenbeck mod…
Normal stress anisotropy and marginal stability in athermal elastic networks
Jordan Shivers, Jingchen Feng, Abhinav Sharma +1
Hydrogels of semiflexible biopolymers such as collagen have been shown to contract axially under shear strain, in contrast to the axial dilation observed for most elastic materials…
Topology determines force distributions in one-dimensional random spring networks
Knut M. Heidemann, Andrew O. Sageman-Furnas, Abhinav Sharma +3
Networks of elastic fibers are ubiquitous in biological systems and often provide mechanical stability to cells and tissues. Fiber reinforced materials are also common in technolog…
Topology counts: force distributions in circular spring networks
Knut M. Heidemann, Andrew O. Sageman-Furnas, Abhinav Sharma +3
Filamentous polymer networks govern the mechanical properties of many biological materials. Force distributions within these networks are typically highly inhomogeneous and, althou…
Force percolation of contractile active gels
José Alvarado, Misha Sheinman, Abhinav Sharma +2
Cells and tissues exert forces and can actively change shape. This strikingly autonomous behavior is powered by the cytoskeleton, which includes an active gel of actin filaments, c…
Stress controls the mechanics of collagen networks
Albert James Licup, Stefan Münster, Abhinav Sharma +5
Collagen is the main structural and load-bearing element of various connective tissues, where it forms the extracellular matrix that supports cells. It has long been known that col…