Regensburg 2013 – scientific programme
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O: Fachverband Oberflächenphysik
O 35: Poster Session I (Metal, semiconductor and oxide substrates: structure and adsorbates; Graphene)
O 35.25: Poster
Tuesday, March 12, 2013, 18:15–21:45, Poster B1
Scanning Tunneling Microscopy Investigation of CU4Dinit on W(110) — •Dennis Kloczan1, Sandra Diehl1, Torsten Methfessel1, Julia Klanke2, Eva Rentschler2, and Hans-Joachim Elmers1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany — 2Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
Organic semiconductors are a class of π-conjugated molecules. Due to their property of charge separation by light induced electron transfer they have various applications in solar cells, sensors or switches.
In order to ensure a good adhesion on surfaces, the π-system of the molecule has to be planar. A promising molecule with an increased number of C-rings is Cu4Dinit (copper-tetraazaporphyrin with eight 4-tertbutylphenyl residues).
Using scanning tunneling microscopy (STM) we have imaged Cu4Dinit molecules on a W(110) surface with submolecular resolution at room-temperature. Scanning tunneling spectroscopy (STS) reveals the energetic position of molecular orbitals relative to the Fermi-level of the substrate.