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 36.72: Poster
Dienstag, 12. März 2013, 18:15–21:45, Poster B2
Ultraviolet photoelectron spectroscopy and transmission electron microscopy of mass selected silver clusters — •Natalie Miroslawski1, Christoph Schröder1, Paul Salmen1, Bernd von Issendorff2, Wilfried Sigle3, Peter A. van Aken3, and Heinz Hövel1 — 1Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Fakultät für Physik, Albert-Ludwigs Universität Freiburg, 79104 Freiburg, Germany — 3MPI for Intelligent Systems, 70569 Stuttgart, Germany
Mass selected silver clusters between 55 and 923 atoms were deposited with less then 0.1eV/atom kinetic energy on Xenon and investigated with ultraviolet photoelectron spectroscopy (UPS) with a photon energy of 11.6eV. The clusters were deposited with different coverage and measured at 15K. To extract the signal of the silver clusters we measured spectra for the rare gas covered substrate before deposition and substracted them from the measurements after cluster deposition. We obtained a size dependent cluster signal for energies in the s-p-band region which are discussed in respect of free beam experiments [1].
Additionally we present transmission electron microscopy (TEM) images of silver clusters with 923, 1100 and 2493 atoms per cluster.
[1] Oleg Kostko, Photoelectron spectroscopy of mass-selected sodium, coinage metal and divalent metal cluster anions, PhD-thesis, Albert-Ludwigs-Universität Freiburg (2007)