Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.18: Poster

Tuesday, March 15, 2011, 18:30–22:00, P4

Local anchoring and functionalization of tetraphenylporphyrins on composite surfaces: A Scanning Tunneling Microscopy Study — •Michael Stark, Stefanie Gläßel, Florian Buchner, Elisabeth Zillner, Michael Röckert, Hans-Peter Steinrück, and Hubertus Marbach — Lehrstuhl für Physikalische Chemie II and Interdisciplinary Center for Molecular Materials (ICMM), Universität Erlangen-Nürnberg, Egerlandstr. 3, D-91058

The understanding of the adsorption behavior of large organic molecules on surfaces is a prerequisite to utilize their functional properties either in single molecule devices or in self-assembled supramolecular architectures.

Herein, we investigate to which extent composite surfaces can act as a template to engineer the adsorption of different tetraphenylporphyrins (TPP). In particular, we investigate the dynamics and assembly of different TPPs on Cu(111) covered with monoatomic thick Ni or oxygen islands via scanning tunneling microscopy (STM) in ultra-high vacuum (UHV), mainly at room temperature (RT). On Ni precovered Cu(111) we find, e.g., that TPP molecules are immobilized selectively on the Ni-islands at RT. Furthermore, we demonstrate the possibility of local anchoring and/or functionalization of the porphyrins on prestructured Cu(111) surfaces.

This work has been funded by the DFG through Sonderforschungsbereich 583.