Nucleation and growth on a superhydrophobic grooved surface

The growth dynamics of water drops condensed on a superhydrophobic geometrically patterned surface were studied. Drop size evolution at early and intermediate times is self-similar. Drop growth laws do not differ for a flat surface because of a reduction of both drop and substrate dimensionality. A...

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Bibliographic Details
Published in:Physical review letters 2004-08, Vol.93 (7), p.076103.1-076103.4, Article 076103
Main Authors: NARHE, R. D, BEYSENS, D. A
Format: Article
Language:English
Subjects:
Chemical Sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Material chemistry
Physics
Solid-fluid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Wetting
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Summary:The growth dynamics of water drops condensed on a superhydrophobic geometrically patterned surface were studied. Drop size evolution at early and intermediate times is self-similar. Drop growth laws do not differ for a flat surface because of a reduction of both drop and substrate dimensionality. A striking observation is the instantaneous drying of the top surface of grooves at a point in time due to coalescence of the drops with a completely filled channel. At late times, only a few large drops grow connected to the channels, in a mixed Wenzel-penetration regime.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.93.076103