A method for studying the structure and thermodynamic properties of interfaces between coexisting fluid phases has been developed recently. The density functional approach employs correlation functions calculated from reference hypernetted-chain integral equations. We report here results for liquid-liquid interfaces: the interface of a symmetrical binary Lennard-Jones mixture, a mixture of particles with different sizes and a polar-nonpolar liquid interface. Also model potentials for argon, CHF 3 , C 6 H 12 and H 2 O are tested with respect to surface properties.
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