Berlin 2005 – wissenschaftliches Programm
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O: Oberflächenphysik
O 18: Adsorption an Oberfl
ächen II
O 18.9: Vortrag
Samstag, 5. März 2005, 12:45–13:00, TU EB301
High pressure STM for atomic resolution studies of surface reactions under realistic conditions — •A. Männig, H. Hoster, H. Rauscher, and R. J. Behm — Abt. Oberflächenchemie und Katalyse, Universität Ulm, D-89096 Ulm
We describe the design and the performance of a high pressure video STM (HP-STM), which allows the atomically resolved analysis of adsorption processes and reactions in a pressure range from ultra high vacuum ( 10−10 mbar) up to atmospheric pressure (1000 mbar). The HP-STM was designed to investigate catalytic reactions under steady state conditions over the so called ’pressure gap’. The high pressure cell with a volume of about 2.5 liters is attached to a UHV preparation / analysis chamber. First atomic resolution results on the oxygen adsorption, e.g. on pure and modified Ru(0001) surfaces are presented.