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 42.93: Poster
Mittwoch, 25. März 2009, 17:45–20:30, P2
Pushing and Pulling a Sn Ion through an Adsorbed Phthalocyanine Molecule — •Yongfeng Wang1, Jörg Kröger1, Richard Berndt1, and Werner A. Hofer2 — 1Institut f*ur Experimentelle und Angewandte Physik, Christian-Albrechts-Universit*at zu Kiel, D-24098 Kiel, Germany — 2Surface Science Research Center, University of Liverpool, Liverpool L69 3BX, United Kingdom
Molecule-based functional devices on surfaces may take advantage of bistable molecular switches. The onformational dynamics and efficiency of switches are radically different on surfaces compared to liquid phase. We present a design of molecular layers, which enables bistable switching on a surface, and, for the first time, demonstrate control of a single switch in a dense and ordered array at the spatial limit. Up and down motion of a central Sn ion through the frame of a phthalocyanine molecule is achieved via resonant electron or hole injection into molecular orbitals.