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.