Chemosensitive running droplet

Yutaka Sumino; Hiroyuki Kitahata; Kenichi Yoshikawa; Masaharu Nagayama; Shin Ichiro M. Nomura; Nobuyuki Magome; Yoshihito Mori

doi:10.1103/PhysRevE.72.041603

Chemosensitive running droplet

Yutaka Sumino, Hiroyuki Kitahata, Kenichi Yoshikawa, Masaharu Nagayama, Shin Ichiro M. Nomura, Nobuyuki Magome, Yoshihito Mori

ENG - Robotics

Research output: Contribution to journal › Article › peer-review

65 Citations (Scopus)

Abstract

Chemical control of the spontaneous motion of a reactive oil droplet moving on a glass substrate under an aqueous phase is reported. Experimental results show that the self-motion of an oil droplet is confined on an acid-treated glass surface. The transient behavior of oil-droplet motion is also observed with a high-speed video camera. A mathematical model that incorporates the effect of the glass surface charge is built based on the experimental observation of oil-droplet motion. A numerical simulation of this mathematical model reproduced the essential features concerning confinement of oil droplet motion within a certain chemical territory and also its transient behavior. Our results may shed light on physical aspects of reactive spreading and a chemotaxis in living things.

Original language	English
Article number	041603
Journal	Physical Review E
Volume	72
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevE.72.041603
Publication status	Published - 2005 Oct

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10.1103/PhysRevE.72.041603

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AU - Sumino, Yutaka

AU - Kitahata, Hiroyuki

AU - Yoshikawa, Kenichi

AU - Nagayama, Masaharu

AU - Nomura, Shin Ichiro M.

AU - Magome, Nobuyuki

AU - Mori, Yoshihito

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AB - Chemical control of the spontaneous motion of a reactive oil droplet moving on a glass substrate under an aqueous phase is reported. Experimental results show that the self-motion of an oil droplet is confined on an acid-treated glass surface. The transient behavior of oil-droplet motion is also observed with a high-speed video camera. A mathematical model that incorporates the effect of the glass surface charge is built based on the experimental observation of oil-droplet motion. A numerical simulation of this mathematical model reproduced the essential features concerning confinement of oil droplet motion within a certain chemical territory and also its transient behavior. Our results may shed light on physical aspects of reactive spreading and a chemotaxis in living things.

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Chemosensitive running droplet

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