Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )
O 36.73: Poster
Dienstag, 12. März 2013, 18:15–21:45, Poster B2
Mass selected copper clusters on rare gases(Ar/Xe): Photoelectron spectroscopy with ultraviolet light — •Paul Salmen1, Natalie Miroslawski1, Christoph Schröder1, Bernd von Issendorff2, and Heinz Hövel1 — 1Fakultät Physik / DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Fakultät für Physik, Universität Freiburg, 79104 Freiburg, Germany
We investigated mass selected copper clusters between 55 and 923 atoms deposited and measured at temperatures between 12 K and 15 K on several monolayers of Argon (Ar) and Xenon (Xe) using ultraviolet photoelectron spectroscopy. The rare gas was used to minimize the cluster/surface interaction and the layers were adsorbed at 30 K (Xe) and 15 K (Ar) on Copper(111) and Silver(111) surfaces. The clusters were soft landed with less than 0.1 eV per atom kinetic energy. To extract the signal of the copper clusters we measured the spectra for the rare gas covered substrate before deposition and subtracted them from measurements after the deposition. We used an Ar-gas discharge lamp (hν=11.6 eV) with a heatable LiF-window to suppress the satellite lines[1].
[1] M.Budke and M.Donath, Appl. Phys. Lett. 92, 231918 (2008); S.Suga, et al., Rev. Sci. Instruments 81, 105111 (2010)