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O: Oberflächenphysik

O 36: Structure and dynamics

O 36.7: Vortrag

Donnerstag, 30. März 2006, 12:45–13:00, WIL C207

Investigation of kinetic effects in the PtAu/Ru system. — •Eleonora Filonenko, Harry Hoster, and R.J. Behm — Department of Surface Chemistry and Catalysis

In order to explain the catalysic properies of well defined PtAu films, the behaviour of both metals was investigated in PtAu films deposited on the Ru(0001)monocrystal surfaces. The effect of heating temperature, ratio of both metals and sequential evaporation on the kinetic processes were studied in the model system PtAu/Ru by means of STM analysis. PtAu films were prepared by means of sequential evaporation and annealed. The non-miscibility of Pt and Au on Ru was proved by the carried out experiments, which agrees with the behavior of PtAu alloy in volume. Results are compared with a system PtAu/Pt(111) and discussed.