Phase separation in binary mixtures of active and passive particles

Soft Matter
Pritha DolaiShradha Mishra

Abstract

We study binary mixtures of small active and big passive athermal particles interacting via soft repulsive forces on a frictional substrate. Athermal self propelled particles are known to phase separate into a dense aggregate and a dilute gas-like phase at fairly low packing fractions. Known as motility induced phase separation, this phenomenon governs the behaviour of binary mixtures for small to intermediate size ratios of the particle species. An effective attraction between passive particles, due to the surrounding active medium, leads to true phase separation for large size ratios and volume fractions of active particles. The effective interaction between active and passive particles can be attractive or repulsive at short range depending on the size ratio and volume fractions of the particles. This affects the clustering of passive particles. We find three distinct phases based on the spatial distribution of passive particles. The cluster size distribution of passive particles decays exponentially in the homogeneous phase. It decays as a power law with an exponential cutoff in the clustered phase and tends to a power law as the system approaches the transition to the phase separated state. We present a phase diagram in th...Continue Reading

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Citations

Apr 3, 2020·Soft Matter·Ryan C MaloneyCarol K Hall
May 6, 2020·Soft Matter·Bao-Quan AiXiao-Miao Zhang
May 7, 2020·Soft Matter·Simin YeMingcheng Yang
Apr 17, 2020·The Journal of Chemical Physics·Berend van der MeerLaura Filion
Jan 10, 2020·The Journal of Chemical Physics·Frederik HaukeBenno Liebchen
May 18, 2020·The Journal of Chemical Physics·Chen Wang, Hongyuan Jiang
Dec 21, 2019·Soft Matter·Thomas Kolb, Daphne Klotsa
Sep 25, 2020·Scientific Reports·Mahmoud Sebtosheikh, Ali Naji
Jun 27, 2020·Soft Matter·Yunfei DuZhonghuai Hou
May 2, 2020·Physical Review Letters·Peng LiuMingcheng Yang
Oct 21, 2020·Physical Review. E·Mahdi Zarif, Ali Naji
Mar 2, 2021·Soft Matter·Ahana Purushothaman, Sumesh P Thampi
Mar 10, 2021·The European Physical Journal. E, Soft Matter·Vivek SemwalShradha Mishra
May 20, 2021·Physical Chemistry Chemical Physics : PCCP·Bingjie ZhangNanrong Zhao
Aug 4, 2021·The Journal of Chemical Physics·S Mahdiyeh MousaviRoland G Winkler
May 19, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Ryan C Maloney, Carol K Hall
Nov 5, 2021·Soft Matter·Bingjie ZhangNanrong Zhao

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