A Quorum Sensing Active Matter in a Confined Geometry

Inspired by the problem of biofilm growth, we numerically investigate clustering in a two-dimensional suspension of active (Janus) particles of finite size confined in a circular cavity. Their dynamics is regulated by a non-reciprocal mechanism that causes them to switch from active to passive above...

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Bibliographic Details
Published inChinese physics letters Vol. 40; no. 10; pp. 100505 - 54
Main Authors Zhou, Yuxin, Li, Yunyun, Marchesoni, Fabio
Format Journal Article
LanguageEnglish
Published Chinese Physical Society and IOP Publishing Ltd 01.10.2023
MOE Key Laboratory of Advanced Micro-Structured Materials and Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China
Dipartimento di Fisica,Università di Camerino,I-62032 Camerino,Italy
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Summary:Inspired by the problem of biofilm growth, we numerically investigate clustering in a two-dimensional suspension of active (Janus) particles of finite size confined in a circular cavity. Their dynamics is regulated by a non-reciprocal mechanism that causes them to switch from active to passive above a certain threshold of the perceived near-neighbor density ( quorum sensing ). A variety of cluster phases, i.e., glassy, solid (hexatic) and liquid, are observed, depending on the particle dynamics at the boundary, the quorum sensing range, and the level of noise.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/40/10/100505