Nucleation scenarios for wetting transition on textured surfaces: The effect of contact angle hysteresisC. Ishino and K. Okumura
Department of Physics, Graduate School of Humanities and Sciences Ochanomizu University - 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
received 3 July 2006; accepted in final form 11 September 2006
published online 7 October 2006
The wettability of textured surfaces is strongly dependent on the contact state of a small drop deposited on them. We consider transitions via nucleation between two representative contact states of Cassie and Wenzel when there exists hysteresis in the contact angle. We find that the effect of the hysteresis is significant: a drop can be trapped by various states which are neither Cassie nor Wenzel states in the conventional sense.
68.08.Bc - Wetting.
05.70.Np - Interface and surface thermodynamics.
81.65.-b - Surface treatments.
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