Berlin 2008 – scientific programme
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O: Fachverband Oberflächenphysik
O 18: Poster Session I - MA 141/144 (Atomic Wires; Size-Selected Clusters; Nanostructures; Metal Substrates: Clean Surfaces+Adsorption of Organic / Bio Molecules+Solid-Liquid Interfaces+Adsorption of O and/or H; Surface or Interface Magnetism; Oxides and Insulators: Clean Surfaces)
O 18.32: Poster
Monday, February 25, 2008, 18:30–19:30, Poster F
STM/STS Analysis of Molecular Chains Consisting of Mn6Cr Single Molecule Magnets and Single Molecules on Highly Ordered Pyrolytic Graphite (HOPG) — •Aaron Gryzia1, Armin Brechling1, Wiebke Hachmann1, Marc D. Sacher1, Ulrich Heinzmann1, Maik Heidemeier2, and Thorsten Glaser2 — 1Molecular and Surface Physics, Bielefeld University — 2Anorganic Chemistry I, Bielefeld University
We report on the preparation and characterization of Mn6Cr-Single Molecule Magnets on a HOPG(0001) surface.
The Mn6Cr-molecules show 1D molecular arrangements with many interesting features, such as the occurrence of discrete kink angles in the molecular chains of 30 deg., only two different molecular orientations, the orientation of the chains along the main crystal axis of HOPG and much larger molecule-molecule distances than expected from the van der Waals radii of the molecules. By STS we characterized Mn6Cr, thus gaining information on the electronic levels of the molecule and the shift of the levels whether it is part of a chain or not. One of our goals is to obtain data about the exact orientation of the molecule in respect to the surface; thus we can make a statement for the physical interaction why the molecules are assembling in chains. First results of these measurements will be presented.