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Long-Range Critical Wetting: Observation of a Critical End Point

Abstract : Alkanes deposited on aqueous substrates exhibit two different types of wetting behavior: alternatively to the usual first-order wetting transition, a sequential-wetting scenario of a long-range critical wetting transition preceded by a first-order thin-thick transition may be observed. Here, we present the first successful experimental attempt to locate the transition point between the standard first-order wetting and the long-range critical wetting: a critical end point, observed in a mixture of pentane and hexane which is deposited on an aqueous solution of glucose. Furthermore, we present the first direct measurement of the contact angle in the intermediate wetting state (frustrated-complete wetting) in the sequential-wetting scenario of hexane on brine and compare to theoretical predictions.
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Contributor : Salima Rafaï <>
Submitted on : Tuesday, March 19, 2013 - 1:26:24 PM
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Salima Rafaï, Daniel Bonn, Emanuel Bertrand, Jacques Meunier, Volker C. Weiss, et al.. Long-Range Critical Wetting: Observation of a Critical End Point. Physical Review Letters, American Physical Society, 2004, 92, pp.245701. ⟨10.1103/PHYSREVLETT.92.245701⟩. ⟨hal-00802229⟩



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