45 citations · 141 across the 13 of their papers we have counts for
13 papers
Positive Feedback Drives Sharp Swelling of Polymer Brushes near Saturation
Simon Schubotz, Eva Bittrich, Holger Merlitz +4
We resolve the Schröder paradox for PNiPAAm brushes, showing experimentally that swelling at 100\% relative humidity (RH) matches the liquid state. This occurs via a sharp increase…
Self-organization and cyclic positioning of active condensates
Hossein Vahid, Jens-Uwe Sommer, Abhinav Sharma
Cohesive active assemblies are often regulated by spatially heterogeneous nonequilibrium driving, such as gradients in motility, biochemical turnover, or mechanical activity. Such…
Collective Dynamics in Active Polar Polymer Assemblies
Hossein Vahid, Jens-Uwe Sommer, Abhinav Sharma
Tangentially driven active polymers (TDAPs), model systems for motor-driven filaments, have been extensively studied in uniform activity fields. Here, we show that an activity grad…
Transport of molecules via polymerization in chemical gradients
Shashank Ravichandir, Bhavesh Valecha, Pietro Luigi Muzzeddu +2
The transport of molecules for chemical reactions is critically important in various cellular biological processes. Despite thermal diffusion being prevalent in many biochemical pr…
Active Transport of Cargo-Carrying and Interconnected Chiral Particles
Bhavesh Valecha, Hossein Vahid, Pietro Luigi Muzzeddu +2
Directed motion up a concentration gradient is crucial for the survival and maintenance of numerous biological systems, such as sperms moving towards an egg during fertilization or…
Migration and separation of polymers in non-uniform active baths
Pietro Luigi Muzzeddu, Andrea Gambassi, Jens-Uwe Sommer +1
Polymer-like structures are ubiquitous in nature and synthetic materials. Their configurational and migration properties are often affected by crowded environments leading to non-t…
Nucleation patterns of polymer crystals analyzed by machine learning models
Atmika Bhardwaj, Jens-Uwe Sommer, Marco Werner
We use machine learning algorithms to detect the crystalline phase in undercooled melts in molecular dynamics simulations. Our classification method is based on local conformation…
Tailoring the escape rate of a Brownian particle by combining a vortex flow with a magnetic field
Iman Abdoli, Hartmut Löwen, Jens-Uwe Sommer +1
The probability per unit time for a thermally activated Brownian particle to escape over a potential well is in general well-described by Kramers theory. Kramers showed that the es…
Escape Dynamics in an Anisotropically Driven Brownian Magneto-System
Iman Abdoli, Jens-Uwe Sommer, Hartmut Löwen +1
Thermally activated escape of a Brownian particle over a potential barrier is well understood within Kramers theory. When subjected to an external magnetic field, the Lorentz force…
The Formation and Structure of Olympic Gels
Jakob Fischer, Michael Lang, Jens-Uwe Sommer
Different methods for creating Olympic gels are analyzed using computer simulations. First ideal reference samples are obtained from freely interpenetrating semi-dilute solutions a…
The Swelling of Olympic Gels
Michael Lang, Jakob Fischer, Marco Werner +1
The swelling equilibrium of Olympic gels, which are composed of entangled cyclic polymers, is studied by Monte Carlo Simulations. In contrast to chemically crosslinked polymer netw…
Nondiffusive Fluxes in Brownian System with Lorentz Force
Iman Abdoli, Hidde Derk Vuijk, Jens-Uwe Sommer +2
The Fokker-Planck equation provides complete statistical description of a particle undergoing random motion in a solvent. In the presence of Lorentz force due to an external magnet…
Monte Carlo simulations of random copolymers at a selective interface
Gongwen Peng, Jens-Uwe Sommer, Alexander Blumen
We investigate numerically using the bond--fluctuation model the adsorption of a random AB--copolymer at the interface between two solvents. From our results we infer several scali…