Geometry-driven collective ordering of bacterial vortices

Kazusa Beppu, Ziane Izri, Jun Gohya, Kanta Eto, Masatoshi Ichikawa, Yusuke T. Maeda

研究成果: ジャーナルへの寄稿学術誌査読

40 被引用数 (Scopus)

抄録

Controlling the phases of matter is a challenge that spans from condensed materials to biological systems. Here, by imposing a geometric boundary condition, we study the controlled collective motion of Escherichia coli bacteria. A circular microwell isolates a rectified vortex from disordered vortices masked in the bulk. For a doublet of microwells, two vortices emerge but their spinning directions show transition from parallel to anti-parallel. A Vicsek-like model for confined self-propelled particles gives the point where the two spinning patterns occur in equal probability and one geometric quantity governs the transition as seen in experiments. This mechanism shapes rich patterns including chiral configurations in a quadruplet of microwells, thus revealing a design principle of active vortices.

本文言語英語
ページ(範囲)5038-5043
ページ数6
ジャーナルSoft Matter
13
29
DOI
出版ステータス出版済み - 2017

!!!All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 凝縮系物理学

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