Dresden 2020 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 28: Statistical Physics of Biological Systems II (joint session BP/DY)

BP 28.2: Vortrag

Mittwoch, 18. März 2020, 15:30–15:45, ZEU 250

Control of droplet kinetics in active emulsions — •Jacqueline Janssen1, Marta Tena-Solsona2,3, Caren Wanzke2, Fabian Schnitter2, Hansol Park4, Benedikt Rieß2, Julianne M. Gibbs4, Job Boekhoven2,3, and Christoph A. Weber11Max Planck Institute for the Physics of Complex Systems — 2Department of Chemistry, Technical University of Munich — 3Institute for Advanced Study, Technical University of Munich — 4Department of Chemistry, University of Alberta

Living cells host many membrane-less organelles which originate via liquid-liquid phase separation in both the cytoplasm and the nucleoplasm. Liquid phase separated droplets are crucial in living cells to spatially control chemical reactions. Recent experimental work revealed a new class of active emulsions where the lifetime and the rate of droplet growth can be controlled. This class of active emulsions involves fuel-driven chemical reactions from thermodynamically stable precursor molecules to metastable building blocks. At large enough concentration of building block material, the liquid droplets can form and undergo an anomalously fast ripening towards fewer droplets of larger size. Up to date, there is no theoretical model which would describe such anomalous ripening kinetics of active emulsions. We have derived a theoretical model which quantitively coincides with the experimental measurements conducted in the Boekhoven Laboratory. Our theory allows to understand how the metastable building blocks determine the lifetime and accelerate the droplet kinetics in this new class of phase separated, active systems.

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