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Regensburg 2007 – scientific programme

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O: Fachverband Oberflächenphysik

O 16: Organic, Polymeric, and Biomolecular Films I

O 16.2: Talk

Monday, March 26, 2007, 14:30–14:45, H42

Surface and Interface Properties of Chrysene on inert Substrates — •Bengt Jaeckel and Bruce Parkinson — Colorado State University; Department of Chemistry; 200 West Lake Street; Fort Collins, CO-80523/USA

The growth and electronic structure of chrysene thin films was studied on four different inert substrates (Au(111), Ag(111), HOPG and SnS2) under ultra high vacuum (UHV) conditions. These substrates have hexagonal symmetry and lattice constants much smaller than the growing chrysene overlayer. A flat-lying chrysene molecule has a 2D or pseudo chirality and ordered surface structures can form ordered chiral domains, racemic 2D unit cells or disordered structures. Variable temperature scanning tunneling microscopy (VT-STM) was used to study the surface structure and ordering of the molecules while X-Ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) were used to study the electronic properties of the interfaces.

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