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O: Fachverband Oberflächenphysik
O 62: Posters: Surface Reactions and Dynamics, Nanostructures
O 62.21: Poster
Mittwoch, 2. April 2014, 17:30–21:00, P1
C60 fullerenes on noble gas layers (Ar/Xe): Photoelectron spectroscopy with ultraviolet light — •Dominik Wolter, Christoph Schröder, Natalie Miroslawski, and Heinz Hövel — Fakultät Physik / DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany
We have investigated C60 clusters deposited and measured at temperatures between 10 K and 13 K on 60 monolayers of xenon (Xe) with 10 monolayers of argon (Ar) on top using ultraviolet photoelectron spectroscopy. The noble gas layers were adsorbed at 45 K (Xe) and 10 K (Ar) on copper(111), silver(111) and gold(111) substrates. To get a well ordered surface the first layer of each gas was adsorbed at slightly higher temperatures (75 K for Xe and 25 K for Ar). We used an Ar-gas discharge lamp (hν=11.6 eV) with a heatable LiF-window to suppress the satellite lines [1]. To extract the signal of the fullerenes we measured the spectra for the rare gas covered substrate before deposition and subtracted them from measurements after the deposition. The observed shift of the C60 spectra depending on substrate and the noble gas layers is of importance for the interpretation of UPS on mass selected metal clusters on similar surfaces.
[1] M.Budke and M.Donath, Appl. Phys. Lett. 92, 231918 (2008); S.Suga, et al., Rev. Sci. Instruments 81, 105111 (2010)