Reentrant wetting transition of a rough wall

Gilberto Giugliarelli and Attilio L. Stella

Physica A: Statistical Mechanics and its Applications, 1997, vol. 239, issue 4, 467-476

Abstract: A 2D model describing depinning of an interface from a rough, self-affine substrate, is studied by transfer matrix methods. The phase diagram is determined for several values of the roughness exponent, ζs, of the attractive wall. For all ζs > 0 the following scenario is observed. In first place, in contrast to the case of a flat wall (ζs = 0), for wall attraction energies between zero and a ζs-dependent positive value, the substrate is always wet. Furthermore, in a small range of attraction energies, a dewetting transition first occurs as T increases, followed by a wetting one. This unusual reentrance phenomenon seems to be a peculiar feature of self-affine roughness, and does not occur, e.g., for periodically corrugated substrates.

Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:239:y:1997:i:4:p:467-476

DOI: 10.1016/S0378-4371(97)00016-2

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