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SUEMATSU Nobuhiko
Department Undergraduate School , School of Interdisciplinary Mathematical Sciences Position Professor |
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| Language | English |
| Publication Date | 2019/05 |
| Type | Academic Journal |
| Peer Review | Peer reviewed |
| Title | Self-Propelled Motion of a Coumarin Disk Characteristically Changed in Couple with Hydrolysis on an Aqueous Phase |
| Contribution Type | Co-authored (other than first author) |
| Journal | Journal of Physical Chemistry B |
| Journal Type | Another Country |
| Publisher | ACS |
| Volume, Issue, Page | 123,pp.4311-4317 |
| Author and coauthor | Satoshi Nakata, Yasutaka Irie, Nobuhiko J. Suematsu |
| Details | © 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 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85065815347&origin=inward |