5 papers
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…
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 increas…
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…
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…
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…