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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Active Matter II (joint session BP/CPP/DY)

CPP 20.6: Talk

Tuesday, March 19, 2024, 10:45–11:00, H 1028

Chemical communication in suspensions of active particles — •Nils Göth and Joachim Dzubiella — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Germany

Chemical communication of bacteria plays an important role in their individual and collective behavior. Here, we study how a simple form of interparticle communication influences a system of colloidal particles. We employ two-dimensional Brownian dynamics simulations of a model of Responsive Colloids, in which the particle size and the internal proton concentration are explicit internal degrees of freedom. The communication between the particles is modeled as a chemical field around each particle to which the other particles respond by changes in their size. We find a rich behavior of structures, including pseudo-regular oscillations and longitudinal waves.

Keywords: Active particles; Brownian dynamics; Responsive collodis; Communication; Chemical reaction