Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 101: Particles and clusters II
O 101.5: Vortrag
Freitag, 18. März 2011, 12:15–12:30, WIL C107
Deformation of Ag Clusters Deposited on Au(111) - Experiment and Molecular Dynamics — •Natalie Miroslawski1, Niklas Grönhagen1, Bernd von Issendorff2, Tommi Järvi3, Michael Moseler2, 3, 4, and Heinz Hövel1 — 1TU Dortmund, Experimentelle Physik I — 2Universität Freiburg, Fakultät Physik — 3Fraunhofer Institut für Werkstoffmechanik, Freiburg — 4Freiburger Materialforschungszentrum
Mass selected clusters from Ag55+ to Ag147±2+ were deposited with different deposition energies at 77 K on Au(111) and imaged with STM at 77 K. We observed a deformation of the cluster shape due to the strong metallic interaction between the cluster and the substrate. The clusters became epitaxial and developed a structure composed of several Ag monolayers. The number of these monolayers depends on the number of atoms in the cluster and the deposition energy. The larger the cluster mass the more monolayers the cluster develops on Au(111) and the larger the deposition energy the fewer monolayers occur. These results were verified by molecular dynamic simulations. Additionally the behaviour of AgN clusters on Au(111) after different annealing steps was investigated.