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	2019/05
形態種別	学術雑誌
査読	査読あり
標題	Self-Propelled Motion of a Coumarin Disk Characteristically Changed in Couple with Hydrolysis on an Aqueous Phase
執筆形態	共著(筆頭者以外)
掲載誌名	Journal of Physical Chemistry B
掲載区分	国外
出版社・発行元	ACS
巻・号・頁	123,pp.4311-4317
著者・共著者	Satoshi Nakata, Yasutaka Irie, Nobuhiko J. Suematsu
概要	© 2019 American Chemical Society. In this study, a coumarin disk was examined as a simple self-propelled object under a chemical reaction. A coumarin disk placed on an aqueous phase containing Na3PO4 as a base exhibited continuous and oscillatory motion at lower and higher initial concentrations of Na3PO4, [Na3PO4]0, respectively. In addition, the period of the oscillation between rest and motion increased with increasing [Na3PO4]0. The mechanism of mode bifurcation between continuous and oscillatory motion and a change in the period of oscillation were discussed in terms of hydrolysis of coumarin and the surface tension of the aqueous solution as a driving force. A reduced mathematical model based on the reaction kinetics of coumarin around the air/aqueous interface, which adequately reproduced the experimental observation, was constructed. These results suggest that the characteristics of the self-propelled motion were determined by the kinetics of hydrolysis.
DOI	10.1021/acs.jpcb.8b11534
ISSN	15206106
PMID	31008603
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