Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 36: Postersitzung (Elektronische Struktur, Grenzfl
äche fest-flüssig, Halbleiteroberfl
ächen und -grenzfl
ächen, Nanostrukturen, Oberfl
ächenreaktionen, Teilchen und Cluster, Struktur und Dynamik reiner Oberfl
ächen)

O 36.79: Poster

Montag, 7. März 2005, 15:00–18:00, Poster TU F

Dynamics of ice surface morphologies close to the melting point — •Sebastian Schöder, Harald Reichert, Simon Engemann, and Helmut Dosch — Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, D-70569 Stuttgart

Ice surfaces play an important role in many natural and technical systems. In order to get access to the dynamics of ice surface structures, we have investigated a vincinal ice surface. The dynamics of the facets was examined with dynamic light scattering in a specially designed experimental chamber. This setup allows us to accurately control the sublimation rate of the observed surface. The results were compared for different temperatures. For low temperatures (-12.5 degrees) no dynamics was found. For temperatures close to the melting point we found dynamic correlations with a correlation time in the order of ten minutes. We attribute this temperature dependent behaviour to the surface melting of ice.