Surface tension, line tension, and wetting

I. Szleifer, B. Widom

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

We analyse a model free-energy functional of two spatially varying densities. We determine the interfacial density profiles and tensions in terms of a parameter in the functional and we locate a first-order wetting transition at a particular value of that parameter. For those states in which there is a three-phase contact line we calculate the line tension. As one of the contact angles decreases from 120° to 0° at the wetting transition the line tension increases from negative to positive values and perhaps diverges to + ∞ as the wetting transition is approached. The origin of this difference in behaviour of the line tension from that in earlier models is discussed.
Original languageEnglish
Pages (from-to)925-943
JournalMolecular Physics
Volume75
DOIs
StatePublished - 1992

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