SKM 2023 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 29: Statistical Physics of Biological Systems II (joint session BP/DY)
BP 29.2: Vortrag
Freitag, 31. März 2023, 09:45–10:00, BAR Schö
Kinetics of droplet sizes in non-conserved emulsions — •Jacqueline Janssen1, Frank Jülicher1, and Christoph A. Weber2 — 1Max Planck Institute for the Physics of Complex Systems — 2University of Augsburg
Droplets form via phase separation and coexist with a dilute phase that is composed of droplet material of lower concentration. Many droplets in an emulsion undergo coarsening to the thermal equilibrium state that corresponds to a single droplet in a finite system. In passive emulsions, where the total amount of droplet material is conserved, the average radius grows as a function t1/3 in time, and the droplet size distribution function broadens. Here we consider emulsions for which the total droplet material is not conserved, e.g. material is supplied by a chemical reaction or external reservoirs. We calculate the kinetics of droplet sizes and show that there is a switch from coarsening to narrowing of the size distribution upon material supply. Regulation of droplet sizes by material supply could be relevant for biomolecular condensates in living cells.