Europhys. Lett, 47 (2), pp. 220-226 (1999)
J. Bico 1, C. Marzolin 2 and D. Quéré 1
1 Laboratoire de Physique de la Matière Condensée
URA 792 du CNRS, Collège de France
75231 Paris Cedex 05, France
2 Saint-Gobain Recherche - 39 quai Lucien-Lefranc
93303 Aubervilliers Cedex, France
(received 4 January 1999; accepted in final form 6 May 1999)
PACS. 68.10 - Fluid surfaces and fluid-fluid
PACS. 68.15 - Liquid thin films.
If deposited on a hydrophobic rough substrate, a small drop of water can look like a pearl, with a contact angle close to . We examine the conditions for observing such a phenomenon and show practical achievements where the contact angle can be predicted and thus quantitatively tuned by the design of the surface microstructure.
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