Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.59: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
Crystallographic Order and Decomposition of [Mn6IIICrIII]3+ SMMs deposited on Various Substrates Analyzed by Means of KPFM and nc-AFM — Aaron Gryzia1, •Timm Volkmann1, Armin Brechling1, Ulrich Heinzmann1, Veronika Hoeke2, and Thorsten Glaser2 — 1Molecular and Surface Physics, Bielefeld University — 2Anorganic Chemistry I, Bielefeld University
[Mn6IIICrIII]3+ Single-Molecule Magnets (SMMs) consist of seven metal ions in its center and organic compounds and ligands in the periphery. On surfaces such as e.g. mica and HOPG, these organic parts and charge of 3+ play an important role regarding the adsorption of the molecule. For charge neutrality [Mn6IIICrIII]3+ needs thus counterions. The resulting dipole moment of the SMM layer influences the local contact potential difference (LCPD). We are able to determine the LCPD of the sample by using frequency modulated Kelvin Probe Force Microscopy (FM-KPFM) at UHV conditions. By means of molecular resolved nc-AFM we found a two-fold symmetry close to a four-fold symmetry in the structure of the on HOPG absorbed SMM monolayer. The two lateral dimensions period matches the size of the molecule whereas these layers heights resemble the SMM’s height. In addition we also observed layers with half the height of the molecules besides those of the full height. We interpret this observation as decomposition of [Mn6IIICrIII]3+ into its molecular building blocks. These layers show a higher LCPD than the layers with full molecular height.