Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles
One of the most intriguing phenomena in active matter has been the gas-liquid like motility induced phase separation (MIPS) observed in repulsive active particles. However, experimentally no particle can be a perfect sphere, and the asymmetric shape, mass distribution or catalysis coating can ind...
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sg-ntu-dr.10356-1599992023-12-29T06:48:43Z Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles Ma, Zhan Ni, Ran School of Chemical and Biomedical Engineering Engineering::Chemical engineering Disintegration Active Brownian Particles One of the most intriguing phenomena in active matter has been the gas-liquid like motility induced phase separation (MIPS) observed in repulsive active particles. However, experimentally no particle can be a perfect sphere, and the asymmetric shape, mass distribution or catalysis coating can induce an active torque on the particle, which makes it a chiral active particle. Here using computer simulations and dynamic mean-field theory, we demonstrate that the large enough torque of circle active Brownian particles (cABPs) in two dimensions generates a dynamical clustering state interrupting the conventional MIPS. Multiple clusters arise from the combination of the conventional MIPS cohesion, and the circulating current caused disintegration. The non-vanishing current in non-equilibrium steady states microscopically originates from the motility ``relieved'' by automatic rotation, which breaks the detailed balance at the continuum level. This suggests that no equilibrium-like phase separation theory can be constructed for chiral active colloids even with tiny active torque, in which no visible collective motion exists. This mechanism also sheds light on the understanding of dynamic clusters observed in a variety of active matter systems. Ministry of Education (MOE) Published version This work was supported by the Singapore Ministry of Education through the Academic Research Fund under Grant No. MOE2019-T2-2-010. 2022-07-07T06:12:07Z 2022-07-07T06:12:07Z 2022 Journal Article Ma, Z. & Ni, R. (2022). Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles. Journal of Chemical Physics, 156(2), 021102-. https://dx.doi.org/10.1063/5.0077389 0021-9606 https://hdl.handle.net/10356/159999 10.1063/5.0077389 156 2-s2.0-85123460493 2 156 021102 en MOE2019-T2-2-010 Journal of Chemical Physics © 2022 Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Chemical Physics and is made available with permission of Author(s). application/pdf |
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Engineering::Chemical engineering Disintegration Active Brownian Particles Ma, Zhan Ni, Ran Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
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One of the most intriguing phenomena in active matter has been the gas-liquid
like motility induced phase separation (MIPS) observed in repulsive active
particles. However, experimentally no particle can be a perfect sphere, and the
asymmetric shape, mass distribution or catalysis coating can induce an active
torque on the particle, which makes it a chiral active particle. Here using
computer simulations and dynamic mean-field theory, we demonstrate that the
large enough torque of circle active Brownian particles (cABPs) in two
dimensions generates a dynamical clustering state interrupting the conventional
MIPS. Multiple clusters arise from the combination of the conventional MIPS
cohesion, and the circulating current caused disintegration. The non-vanishing
current in non-equilibrium steady states microscopically originates from the
motility ``relieved'' by automatic rotation, which breaks the detailed balance
at the continuum level. This suggests that no equilibrium-like phase separation
theory can be constructed for chiral active colloids even with tiny active
torque, in which no visible collective motion exists. This mechanism also sheds
light on the understanding of dynamic clusters observed in a variety of active
matter systems. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Ma, Zhan Ni, Ran |
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Article |
author |
Ma, Zhan Ni, Ran |
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Ma, Zhan |
title |
Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
title_short |
Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
title_full |
Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
title_fullStr |
Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
title_full_unstemmed |
Dynamical clustering interrupts motility-induced phase separation in chiral active Brownian particles |
title_sort |
dynamical clustering interrupts motility-induced phase separation in chiral active brownian particles |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/159999 |
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1787136581052661760 |