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Abstract : Preferential adsorption of molecules in a molecular fluid by a wall is modelled by the introduction of orientational degrees of freedom, which cause the effective wall-molecule potential energy to be temperature dependent. Under suitable circumstances re-entrant wetting transitions can occur. As temperature is reduced the surface can be successively wet, dry, wet and dry again. Associated with the wet phase is a re-entrant surface phase transition analogous to the high temperature prewetting line. Exact two dimensional and approximate mean field calculations have been carried out to illuminate this phenomenon.

Keywords : adsorption mixtures phase transformations wetting molecular fluid mixtures molecules orientational degrees of freedom wall molecule potential energy re entrant wetting transitions wet phase surface phase transition mean field calculations





Autor: T.J. Sluckin J.T. Chalker

Fuente: https://hal.archives-ouvertes.fr/



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