Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Oberflächenphysik
O 40: Adsorption an Oberfl
ächen IV
O 40.4: Vortrag
Dienstag, 8. März 2005, 11:30–11:45, TU EB202
Formation of Fe Clusters on Superstructured Al2O3 Films on Ni3Al(111) — •Anne Lehnert, Regis Decker, Katharina Franke, Stefano Rusponi, and Harald Brune — IPN, EPF Lausanne, Switzerland
Common industrial catalysts consist of small metal particles dispersed on oxide surfaces. In order to prepare a model system to study systematically the catalytic properties as a function of size, shape, and composition, we grow a well-ordered Al2O3 film on Ni3Al(111). The alumina film is known to exhibit a long-range ordered superstructure, partly of electronic origin.
On top of the oxide layer we deposit iron. By using STM, we investigate the formation of iron clusters in dependence of several parameters, such as coverage, deposition and annealing temperature.