47 citations · 226 across the 28 of their papers we have counts for
29 papers
Density-driven reentrant polymer transitions via saturable bridging crowders
Monmee Phukan, Hitesh Garg, Satyavani Vemparala
Reentrant coil-globule-coil transitions, in which a polymer collapses and then reexpands as a single parameter is varied, have been observed across diverse soft matter systems, yet…
Self-organization and memory formation in two-dimensional jammed deformable matter under cyclic compression
Rahul Nayak, Satyavani Vemparala, Pinaki Chaudhuri
We study the athermal mechanical response of deformable ring assemblies to quasistatic compression. Beyond jamming, further densification induces buckling of rings, resulting in ma…
Glassy dynamics in two-dimensional ring polymers: size versus stiffness polydispersity
Rahul Nayak, Pinaki Chaudhuri, Satyavani Vemparala
Soft glassy materials often consist of deformable objects. Here, we use a two-dimensional assembly of semi-flexible ring polymers as a model system to investigate how polydispersit…
Accelerated Collapse Kinetics of Charged Polymers in Good Solvent: Role of Counterion Condensation
Susmita Ghosh, Satyavani Vemparala
We investigate the collapse kinetics of charged polymers (polyelectrolytes) induced by counterion condensation using coarse-grained molecular dynamics simulations. Under good solve…
Aging of ring polymeric topological glass formers via thermal quench
Arabinda Behera, Projesh Roy, Pinaki Chaudhuri +1
We investigate the dynamical response of glass-forming systems composed of topologically constrained ring polymers subjected to an instantaneous thermal quench, employing large-sca…
Bridging-induced Aggregation in Neutral Polymers: Dynamics and Morphologies
Hitesh Garg, Satyavani Vemparala
Using molecular dynamics simulations, we investigate the aggregation behavior of neutral stiff (rod-like) and flexible polymer chains mediated by attractive crowders. Attractive cr…
Neutral polymer conformations with attractive bridging crowder interactions: role of crowder size
Hitesh Garg, Satyavani Vemparala
Extensive molecular dynamics simulations were conducted to explore the conformational phase diagram of a neutral polymer in the presence of attractive crowders of varying sizes. Fo…
Solvent-cosolvent attraction is sufficient to induce polymer collapse in good solvent mixtures
Hitesh Garg, Divya Nayar, Satyavani Vemparala
Cononsolvency occurs when two miscible, competing good solvents for a polymer are mixed, resulting in a loss of solubility. In this study, we demonstrate through simulations, suppo…
Two-dimensional squishy glass: yielding under oscillatory shear
Sayantan Ghosh, Rahul Nayak, Satyavani Vemparala +1
The yielding response to an imposed oscillatory shear is investigated for a model two-dimensional dense glass composed of bidisperse, deformable polymer rings, with the ring stiffn…
The conformational phase diagram of charged polymers in the presence of attractive bridging crowders
Kamal Tripathi, Hitesh Garg, R. Rajesh +1
Using extensive molecular dynamics simulations, we obtain the conformational phase diagram of a charged polymer in the presence of oppositely charged counterions and neutral attrac…
Onset of glassiness in two-dimensional ring polymers: interplay of stiffness and crowding
Sayantan Ghosh, Satyavani Vemparala, Pinaki Chaudhuri
The effect of ring stiffness and pressure on the glassy dynamics of a thermal assembly of two-dimensional ring polymers is investigated using extensive coarse-grained molecular dyn…
Bidisperse ring polymers: topological glass to stacking
Projesh Kumar Roy, Pinaki Chaudhuri, Satyavani Vemparala
Via large-scale molecular dynamics simulations, we observe the melting of a topological glass of stiff ring polymers by incorporating flexible ring polymers, along an isobaric path…
Conformational landscape of long semiflexible linear and ring polymers near attractive surfaces
Kamal Tripathi, Satyavani Vemparala
Conformations of a crowded neutral semiflexible polymer under confinement near an attractive wall are studied via coarse-grained simulations. We study the effects of the interplay…
The conformational phase diagram of neutral polymers in the presence of attractive crowders
Hitesh Garg, R Rajesh, Satyavani Vemparala
Extensive coarse grained molecular dynamics simulations are performed to investigate the conformational phase diagram of a neutral polymer in the presence of attractive crowders. W…
Effect of ring stiffness and ambient pressure on the dynamical slowdown in ring polymers
Projesh Kumar Roy, Pinaki Chaudhuri, Satyavani Vemparala
Using extensive molecular dynamics simulations, we investigate the slowing down of dynamics in a 3D system of ring polymers by varying the ambient pressure and the stiffness of the…
Aggregation dynamics of methacrylate binary and ternary biomimetic polymers in solution
Garima Rani, Kenichi Kuroda, Satyavani Vemparala
Using detailed atomistic simulations,we explore the conformational landscape of aggregates formed by biomimetic antimicrobial(AM) binary methacrylate copolymers,with hydrophobic an…
Confined crowded polymers near attractive surfaces
Kamal Tripathi, Gautam I. Menon, Satyavani Vemparala
We present results from molecular dynamics simulations of a spherically confined neutral polymer in the presence of crowding agents, studying polymer shapes and conformations as a…
Aggregation of flexible polyelectrolytes: Phase diagram and dynamics
Anvy Moly Tom, Ravindran Rajesh, Satyavani Vemparala
Similarly-charged polymers in solution, known as polyelectrolytes, are known to form aggregated structures in the presence of oppositely charged counterions. Understanding the depe…
Regimes of strong electrostatic collapse of a highly charged polyelectrolyte in a poor solvent
Anvy Moly Tom, Satyavani Vemparala, R Rajesh +1
We perform extensive molecular dynamics simulations of a highly charged flexible polyelectrolyte (PE) chain in a poor solvent for the case when the chain is in a collapsed state an…
Mechanism of chain collapse of strongly charged polyelectrolytes
Anvy Moly Tom, Satyavani Vemparala, R. Rajesh +1
We perform extensive molecular dynamics simulations of a charged polymer in a good solvent in the regime where the chain is collapsed. We analyze the dependence of the gyration rad…
Effect of simple solutes on the long range dipolar correlations in liquid water
Upayan Baul, J. Maruthi Pradeep Kanth, Ramesh Anishetty +1
Intermolecular correlations in liquid water at ambient conditions have generally been characterized through short range density fluctuations described through the atomic pair distr…
Aggregation Dynamics of Rigid Polyelectrolytes
Anvy Moly Tom, R. Rajesh, Satyavani Vemparala
Similarly-charged polyelectrolytes are known to attract each other and aggregate into bundles when the charge density of the polymers exceeds a critical value that depends on the v…
Force fluctuations in stretching a tethered polymer
Anoop Varghese, Satyavani Vemparala, R. Rajesh
The recently proposed fluctuation relation in unfolding forces [Phys. Rev. E , (R) ] is re-examined taking into account the explicit time dependence of th…
Ion Hydration and Associated Defects in Hydrogen Bond Network of Water: Observation of Reorientationally Slow Water Molecules Beyond First Hydration Shell in Aqueous Solutions of MgCl
Upayan Baul, Satyavani Vemparala
Effects of presence of ions, at moderate to high concentrations, on dynamical properties of water molecules are investigated through classical molecular dynamics simulations using…