期刊
APPLIED PHYSICS LETTERS
卷 106, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4921923
关键词
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资金
- National Science Foundation [CBET-12-36373]
- Department of Energy [CNMS-2012-094, CNMS-2014-074]
- Natural Sciences and Engineering Research Council of Canada
- U.S. Department of Energy [DE-AC05-00OR22725]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1236373] Funding Source: National Science Foundation
Dropwise condensation can be enhanced by superhydrophobic surfaces on which the condensate drops spontaneously jump upon coalescence. However, the self-propelled jumping in prior reports is mostly perpendicular to the substrate. Here, we propose a substrate design with regularly spaced micropillars. Coalescence on the sidewalls of the micropillars leads to self-propelled jumping in a direction nearly orthogonal to the pillars and therefore parallel to the substrate. This in-plane motion in turn produces sweeping removal of multiple neighboring drops. The spontaneous sweeping mechanism may greatly enhance dropwise condensation in a self-sustained manner. (C) 2015 AIP Publishing LLC.
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