Regensburg 2007 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 1: Organic Thin Films I

DS 1.3: Vortrag

Montag, 26. März 2007, 10:00–10:15, H32

Epitaxial Heterolayers of Quaterrylene and HBC on Au(111) — •Daniel Kasemann, Robert Franke, Roman Forker, and Torsten Fritz — Institut für Angewandte Photophysik, Mommsenstr. 13, D-01069 Dresden, Germany

As growth and electronic properties of perylene derivatives [1] and other medium-sized planar aromatic molecules [2] have already been studied intensively, we have now investigated larger organic molecules, namely quaterrylene (QT).

In our contribution, we will present the first results on the investigation of thin, highly ordered double layers of QT and hexa-peri-hexabenzocoronene (HBC). These layers were prepared on a gold single crystal (Au(111)) by Organic Molecular Beam Epitaxy (OMBE).

We were able to image these structures with molecular resolution by room temperature STM. With these real space images and an additional LEED analysis, the system could be succesfully characterized. The QT was found to grow in a point-on-line mode on the HBC, the lattice vectors are relaxed compared to the growth of QT directly on Au(111) [3].

[1] M. Toerker et al., PRB 65 (2002) 245422

[2] H. Proehl et al., PRB 63 (2001) 205409

[3] R. Franke et al., APL 88 (2006) 161907