Regensburg 2007 – scientific programme

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DS: Fachverband Dünne Schichten

DS 15: Poster Session

DS 15.6: Poster

Tuesday, March 27, 2007, 15:00–17:00, Poster B

XPS and ARPES studies of azobenzene derivatives on HfS₂ — •Jaroslaw Iwicki, Susanne Kobelt, Christian Hamann, Kai Rossnagel, and Lutz Kipp — Institut für Experimentelle und Angewandte Physik, Universität Kiel, D-24098 Kiel, Germany

The light induced isomerization of switchable molecules is of potential importance for several applications, e.g., molecular electronics. In this study derivatives of azobenzene (phenylazobenzoic acid, disperse orange 3) were evaporated onto the layered material HfS₂ under UHV conditions. As a consequence of the weak bonding to the inert surface of HfS₂ the molecules do not deform and should retain their switchability. XPS and ARPES measurements were carried out at the BW3 beamline at HASYLAB with a Specs Phoibos 150 analyzer. XPS measurements confirm the adsorption of the azobenzene derivatives on the substrate and XANES and EXAFS reveal the adsorption geometry. ARPES, XANES and EXAFS data will be presented and discussed.
This work is supported by the DFG Forschergruppe 353.