Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 64: Solid/liquid interfaces I (focussed session)

O 64.3: Hauptvortrag

Donnerstag, 25. März 2010, 11:30–12:00, H33

Atomic-scale dynamics and interactions at solid-liquid interfaces — •Olaf Magnussen — Institut für experimentelle und angewandte Physik, Universität Kiel, Kiel, Germany

A wide variety of interface reactions, such as dissolution and growth, self-assembly, or catalytic reactions, are crucially affected by the surface transport and the interactions of species at solid-liquid interfaces. Understanding how the presence of the liquid phase and the precise interface structure influence these atomic-scale dynamic processes is hence of great interest. Using well-controlled electrochemical model systems and scanning tunnelling microscopy at video-frequency image acquisition rates, direct in-situ observations of such dynamic events are possible, providing quantitative data on surface diffusion barriers and interaction energies in these complex systems. As examples, the diffusion and interaction of different types of adsorbates as well as the collective dynamics of nanostructures are discussed for the case of Cu(100) electrode surfaces in aqueous solution.