Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 61: Nanostructures at Surfaces III
O 61.2: Talk
Wednesday, April 2, 2014, 16:15–16:30, WIL B321
Mass selected copper clusters on xenon and argon investigated with ultraviolet photoelectron spectroscopy (UPS) — •Christoph Schröder1, Natalie Miroslawski1, Paul Salmen1, Dominik Wolter1, Bernd von Issendorff2, and Heinz Hövel1 — 1Fakultät Physik / DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, D-79104 Freiburg
We deposit mass selected copper clusters on Cu(111), Au(111) and HOPG. To minimize the cluster surface interaction the substrates are covered with rare gas layers before softlanding the nanoparticles. These samples are measured with ultraviolet photoelectron spectroscopy (UPS) using a photon energy of hν=11.6 eV. We obtain signal in the sp-band region of the clusters which should be comparable to free beam cluster spectra [1,2] of the same clustersize, because of the low cluster surface interaction. This gives us hints about what happens to the electronic structure of clusters when they have contact to a surface. Furthermore we investigate the shift of the spectra caused by changing the substrate.
[1] O. Kostko, PhD-thesis, Albert-Ludwig-Universität Freiburg (2007).
[2] H. Häkkinen, M. Moseler, O. Kostko, N. Morgner, M. A. Hoffmann and B. v. Issendorff, Phys. Rev. Lett. 93, 093401 (2004).