Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 14: Organic/bio Molecules on Metal Surfaces II

O 14.3: Talk

Monday, March 31, 2014, 16:30–16:45, TRE Phy

Fabrication of chemical templates for the selective adsorption of functional molecules by Focused Electron Beam Induced Processing — •Martin Drost, Fan Tu, Esther Carrasco, Florian Vollnhals, Hans-Peter Steinrück, and Hubertus Marbach — Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, D-91058

The fabrication of well-defined nanostructures is usually realized by choosing one of the two main methods: the bottom-up approach, e.g. the self-assembly of supramolecular structures on surfaces, and top-down methods like electron beam lithography. We target at combining both methods such that local surface modifications by focused electron beam induced processing (FEBIP) act as a template for the adsorption of functional molecules, here 2H-Tetraphenylporphyrin (2HTPP). First, the adsorption behavior of 2HTPP on metal surfaces like Cu(111) and Rh(110) with and without adsorbed oxygen was studied. Second, the feasibility of locally altering the surface by FEBIP, e.g. by local electron induced oxygen desorption for the directed adsorption of 2HTPP, was investigated by a combination of Scanning Electron Microscopy (SEM), Auger Electron Spectroscopy (AES) and Scanning Tunneling Microscopy (STM). Latest results will be presented and discussed.

This work was supported by the DFG via grant MA 4246/1-2 and MA 4246/2-1.