Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 2: Active Matter I (joint session BP/CPP/DY)
DY 2.10: Vortrag
Montag, 18. März 2024, 12:00–12:15, H 1028
Chemotaxis of an active particle attached to a semiflexible cargo — •Shashank Ravichandir1, Abhinav Sharma2,1, and Jens-Uwe Sommer1 — 1Leibniz-Institut für Polymerforschung, Dresden, Germany — 2Universität Augsburg, Augsburg, Germany
The chemotaxis of synthetic active particles in activity gradients, achieved by connecting them to other active/passive particles to form simple dimers, has been demonstrated in recent studies. These studies have been extended to synthetic active particles connected to each other to form polymer chains, which also exhibit chemotaxis. However, the study of these polymer chains in activity gradients has been limited to the Rouse model, wherein the particles are connected to each other via springs, and the excluded volume interactions are ignored. To obtain a more realistic description, we consider an active synthetic particle connected to a passive tail that is semiflexible. In such a system, the configuration of the passive tail affects the motion of the active particle. Using Langevin dynamics simulations, we show that these polymers also exhibit chemotaxis in activity gradients despite the coupling between the active particle and the passive tail. We also study the effects of the chain length and bending rigidity on the chemotactic behavior.
Keywords: Chemotaxis; Active polymers; Langevin Dynamics