Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 4: Colloids and Nanoparticles II: Effective Interactions

CPP 4.3: Talk

Monday, March 26, 2007, 14:45–15:00, H37

Theoretical study of a liquid-vapor interface and effective interactions between colloids at interface — •Vitalie Botan and Martin Oettel — Institut für Physik, WA 331, Johannes-Gutenberg-Universität Mainz, D-55099 Mainz, Germany

We present a microscopic theory combined of integral equations and density functional theory to study the liquid-vapor interfacial properties of simple liquids. The asymptotic behavior of the density profiles, inhomogeneous two-body correlation functions and their implication for the surface tension are analyzed with respect to the mesoscopic capillary wave picture. In contrast to mean-field theories of the interface we observe fairly strong feedback of the pair correlation function to the density profile. The developed methods are applied to the study of interfacial effects in the effective interaction between colloids trapped at the interface.