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 36.78: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Interaction of Metal Clusters with Organic Molecules: Absorption Spectroscopy and Current Setup of a Photoemission Electron Microscope — •Hannes Hartmann1, Ingo Barke1, Vladimir Popok2, Alexandra Pazidis1, Antje Neubauer1, Stephan Bartling1, Stefan Lochbrunner1, and Karl-Heinz Meiwes-Broer11Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock, Germany — 2Department of Physics and Nanotechnology, Aalborg University, 9220 Aalborg, Denmark

Clusters and nanoparticles are of significant interest for applications in catalysis. One approach is the utilization of the nanoparticles' optical properties to increase the efficiency of existing catalytic schemes. In this contribution recent results on the optical properties of a system of Ir based photosensitizers (PS) in interaction with Ag clusters are summarized in view of potential applications for photocatalytic hydrogen production. For a more detailed understanding of the coupling mechanisms between deposited clusters and organic molecules an experimental setup for photoemission electron microscopy (PEEM) is being realized. The PEEM is equipped with an imaging time-of-flight and a retarding-field energy filter. Several excitation sources can be used, including a Hg-lamp, a 266nm cw-laser, and a Ti:sapphire laser for two-photon photoemission (2PPE). In addition to standard equipments for sample preparation the chamber is attached to a cluster source for in-situ deposition of mass-selected nanoparticles. The current state of design and construction of the experimental setup, as well as the results of first measurements are presented.

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