Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)
O 42.48: Poster
Mittwoch, 25. März 2009, 17:45–20:30, P2
Scanning tunneling microscopy of polyoxometaltes on Au(111) — •Leonid Kliuienko1, Paul Kögerler2, and Bert Voigtländer1 — 1Institute of Bio- und Nanosystems (IBN) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany — 2Institute of Solid State Research (IFF) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany
Single and aggregated {Mo72Fe30} · H2O polyoxometalate (POM) clusters have been studied by low-temperature ultra high vacuum (UHV) scanning tunneling microscope (STM). Several methods where tried to deposit polyoxometalates on the Au(111) surface. "Drop casting" from a water solution in N2 atmosphere and pulse injection techniques were used for POM cluster deposition onto a previously cleaned Au(111) surface. After subsequent annealing in UHV samples were studied in the STM. STM images shows that POM clusters were adsorbed on clean Au (111) surface and reveal a strong affinity towards cluster agglomeration. Nevertheless it was possible to image single POM clusters.