Ratchet transport powered by chiral active particles

Scientific Reports
Bao-Quan Ai

Abstract

We numerically investigate the ratchet transport of mixtures of active and passive particles in a transversal asymmetric channel. A big passive particle is immersed in a 'sea' of active particles. Due to the chirality of active particles, the longitudinal directed transport is induced by the transversal asymmetry. For the active particles, the chirality completely determines the direction of the ratchet transport, the counterclockwise and clockwise particles move to the opposite directions and can be separated. However, for the passive particle, the transport behavior becomes complicated, the direction is determined by competitions among the chirality, the self-propulsion speed, and the packing fraction. Interestingly, within certain parameters, the passive particle moves to the left, while active particles move to the right. In addition, there exist optimal parameters (the chirality, the height of the barrier, the self-propulsion speed and the packing fraction) at which the rectified efficiency takes its maximal value. Our findings could be used for the experimental pursuit of the ratchet transport powered by chiral active particles.

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Citations

May 18, 2018·Soft Matter·Bao-Quan AiWei-Rong Zhong
Nov 23, 2017·The Journal of Chemical Physics·Mahdi Zaeifi Yamchi, Ali Naji
May 18, 2020·The Journal of Chemical Physics·Wei-Jing ZhuBao-Quan Ai
Jun 9, 2018·Physical Review Letters·Aritra K MukhopadhyayPeter Schmelcher
Nov 11, 2019·The Journal of Chemical Physics·Xinshuang LiuZhonghuai Hou
Dec 18, 2020·Physical Review. E·Maria Christine L LugoMark Nolan P Confesor
Dec 19, 2020·Physical Review Letters·Thomas BaroisHamid Kellay
Mar 20, 2021·Physical Review. E·Fane FengNanrong Zhao
Aug 12, 2021·Scientific Reports·Cesar MancheinMarcus W Beims

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