Dresden 2003 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Oberflächenphysik

O 24: Postersitzung (Epitaxie und Wachstum, Oxide und Isolatoren, Elektronische Struktur, Oberfl
ächenreaktionen, Adsorption an Oberfl
ächen, Organische Dünnschichten)

O 24.82: Poster

Mittwoch, 26. März 2003, 14:30–17:30, P1

Scanning tunneling spectroscopy at organic films: PTCDA and CuPC on Cu(111) — •Thorsten Wagner, Amin Bannani, Christian Bobisch, and Rolf Möller — Universität Essen, Fachbereich Physik, Institut für experimentelle Physik, 45117 Essen

This work focuses on spectroscopic measurements by STS on thin organic films formed by 3,4,9,10-perylene-tetracarboxylic-dianhydrid (PTCDA) and copper-phthalocyanine (CuPC). The thin films have been prepared by in situ vapour deposition on a Cu(111) single crystal surface under UHV conditions. The homogeneous systems of either PTCDA or CuPC reveal only a little signal in the dI/dV mapping due to different coverages on the substrate. However the dI/dV measurements provide a clear chemical contrast between the two types of molecules. This facilitates the identification of the various unit cells for the mixed phase.