スエマツ　ノブヒコ   SUEMATSU Nobuhiko   末松　信彦    所属   明治大学  総合数理学部    職種   専任教授
言語種別	英語
発行・発表の年月	2019/08
形態種別	学術雑誌
査読	査読あり
標題	Dynamical quorum sensing in non-living active matter
執筆形態	共著(編集/監修)
掲載誌名	Journal of the Physical Society of Japan
掲載区分	国外
巻・号・頁	88,pp.093002
著者・共著者	Yui Matsuda, Kota Ikeda, Yumihiko Ikura, Hiraku Nishimori, Nobuhiko J. Suematsu
概要	Physical ©2019 Society The Author(s) of Japan Oscillation in the metabolism of microorganisms often depends on the cell density, where each cell interacts through the mediator concentration(s) in its environment. Such bifurcation behavior induced by the increase in cell density is called quorum sensing. Here, we found similar behavior in “active matter”, which is a non-living material that spontaneously propels itself. Active camphor disk, which freely moves on water, showed oscillatory motion with the increase in density. This oscillatory motion is not reciprocation motion but alternates between rest and rapid motion. The disks interact through the camphor concentration in its environment and the oscillatory motion originates from the slow dynamics of the environmental condition, which is the typical characteristics of dynamical quorum sensing. This is the first report about dynamical quorum sensing in active matter.
DOI	10.7566/JPSJ.88.093002
ISSN	00319015
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