Nucleation and Growth on a Superhydrophobic Grooved Surface

R. D. Narhe and D. A. Beysens

Phys. Rev. Lett. 93, 076103 – Published 13 August 2004

Abstract

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.

Received 23 March 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.076103

Authors & Affiliations

R. D. Narhe and D. A. Beysens^*

Equipe CEA-CNRS du Supercritique pour l'Environnement, les Matériaux et l'Espace, Service des Basses Températures, CEA-Grenoble, Grenoble, France

^*Author to whom correspondence should be addressed at CEA-ESEME, ESPCI-PMMH, 10, rue Vauquelin, 75231, Paris, Cedex 5, France. Electronic address: dbeysens@cea.fr

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Issue

Vol. 93, Iss. 7 — 13 August 2004

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