Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 26: Poster III
A 26.13: Poster
Thursday, March 17, 2011, 16:00–18:30, P2
Electronic Structure of Transition Metal Doped Gold Clusters — •Konstantin Hirsch1,2, Jochen Rittmann2, Vicente Zamudio-Bayer2, Marlene Vogel2, Jörg Wittich1, Silvia Forin1, Christian Kasigkeit1, Felix Ameseder1, Jürgen Probst2, Thomas Möller1, Bernd von Issendorff3, and Tobias Lau2 — 1Technische Universität Berlin, Institut für Optik und Atomare Physik, EW 3-1, Hardenbergstraße 36, D-10623 Berlin — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen Campus / BESSY II, Institut für Methoden und Instrumentierung der Synchrotronstrahlung, Albert-Einstein-Str. 15, D-12489 Berlin — 3Albert-Ludwigs-Universität Freiburg, Fakultät für Physik/FMF, Stefan-Meier-Straße 21, D-79104 Freiburg
Small gold clusters show very suprising properties, like highly enhanced catalytical activity. The electronic properties of small clusters can be modified by doping with transition metal atoms. We investigated the local electronic structure of small doped gold clusters (AunM n=1-8, M=Sc,Ti,V,Cr) by means of X-ray absorption spectroscopy. The electronic structure is very sensitive to the doping and geometric structure of the cluster. Electron localization of the 3d orbitals of the impurity atom and shell closure effects in the gold host matrix can be deduced from comparison to atomic Hartree Fock calculations.