Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 18: Poster: Towards Molecular Spintronics, Organic Thin Films, Optical Layers, Vibrational Spectroscopy, Tayloring organic interfaces

DS 18.27: Poster

Dienstag, 26. Februar 2008, 14:30–19:30, Poster A

XPS and ARPES studies of azobenzene derivatives on layered materials — •Jaroslaw Iwicki, Tilo Peter, Kai Rossnagel, and Lutz Kipp — Institut für Experimentelle und Angewandte Physik, Universität Kiel, D-24098 Kiel, Germany

Derivatives of azobenzene with different dipole moments were deposited onto layered materials. The preparation process allows the deposition of low sublimation point molecules on a crystal surface under UHV conditions with a marginal contamination of residual gas atoms. The tube with the molecules is vacuum pumped, cooled in a nitrogen bath, heat sealed and placed in the UHV preparation chamber. The deposition process starts when the seal is broken. XPS and ARPES measurements have been carried out at the BW3 beamline at HASYLAB. XPS measurements confirm the adsorption of the azobenzene derivatives on the substrate and ARPES measurements disclose the valence electronic structure of the molecules on the crystal surface.