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O: Oberflächenphysik

O 21: Adsorption an Oberfl
ächen II

O 21.7: Talk

Tuesday, March 25, 2003, 16:30–16:45, HSZ/03

Tunneling Spectroscopy of a Molecular Wire — •X. Ge¹, J. Kuntze¹, L. Limot¹, R. Berndt¹, P. Jiang², A. Gourdon², and C. Joachim² — ¹Institut für Experimentelle und Angewandte Physik der Universität Kiel, D-24098 Kiel — ²CEMES-CNRS, F-31055 Toulouse Cedex

We have performed scanning tunneling microscopy and spectroscopy (STM/STS) operating at 5K in UHV on a synthetic molecular wire (No-dqlanderNo-dq molecule) to characterize its structural and electronic properties. Tunneling spectroscopy of single molecules adsorbed on Cu(100), Ag(111), and Cu₃Au(100) reveals a substrate dependent molecular gap. Measured spectra are compared with electronic structure calculations based on the molecular conformations extracted from STM images.