期刊
EPL
卷 110, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/110/54002
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资金
- U.S. Civilian Research & Development Foundation (CRDF Global) [RUP1-7078-PE-12]
- National Science Foundation [OISE-9531011]
- Ural Branch of the Russian Academy of Sciences
Self-propulsion of a Janus droplet in a solution of surfactant, which reacts on a half of a drop surface, is studied theoretically. The droplet acts as a catalytic motor creating a concentration gradient, which generates its surface-tension-driven motion; the self-propulsion speed is rather high, 60 mu m/s and more. This catalytic motor has several advantages over other micromotors: simple manufacturing, easily attained neutral buoyancy. In contrast to a single-fluid droplet, which demonstrates a self-propulsion as a result of symmetry breaking instability, for the Janus one no stability threshold exists; hence, the droplet radius can be scaled down to micrometers. Copyright (C) EPLA, 2015
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