### 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 language | English |
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Pages (from-to) | 925-943 |

Journal | Molecular Physics |

Volume | 75 |

DOIs | |

State | Published - 1992 |

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## Cite this

Szleifer, I., & Widom, B. (1992). Surface tension, line tension, and wetting.

*Molecular Physics*,*75*, 925-943. https://doi.org/10.1080/00268979200100701