Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 55: Poster Session III - MA 141/144 (Methods: Atomic and Electronic Structure; Particles and Clusters; Heterogeneous Catalysis; Semiconductor Substrates: Epitaxy and Growth+Adsorption+Clean Surfaces+Solid-Liquid Interfaces; Oxides and Insulators: Solid-Liquid Interfaces+Epitaxy and Growth; Phase Transitions; Metal Substrates: Adsorption of Inorganic Molecules+Epitaxy and Growth; Surface Chemical Reactions; Bimetallic Nanosystems: Tuning Physical and Chemical Properties; Oxides and insulators: Adsorption; Organic, polymeric, biomolecular films; etc.)
O 55.66: Poster
Mittwoch, 27. Februar 2008, 18:30–19:30, Poster F
Preparation and investigation of galvinoxyl on potassium bromide — •Miriam Klusmann and Marika Schleberger — Universität Duisburg-Essen, Fachbereich Physik, Lotharstraße 1, D-47048 Duisburg, Germany
Molecular magnets are supposed to offer storage densities up to some tera bits per square inch. But before any technical application can be realized a suitable preparative method to produce well-ordered structures of such molecular assemblies is required. Most of the molecular magnets cannot be deposited on surfaces by conventional techniques like organic molecular beam epitaxy (OMBE) due to thermal decomposition of the molecules below the operating temperature of the evaporator. To avoid this problem we use a pulsed valve to spray a solution that contains molecular magnets onto the bare substrat. Preparation takes place under ultra-high vacuum (UHV) conditions. The idea is that the solvent evaporates while the molecules adsorb (ideally intact) onto the surface. We report on results obtained with the stable radical galvinoxyl (C29H41O2) dissolved in ethanol p. a. and injected onto a freshly cleaved (100)-surface of the insulator potassium bromide (KBr). Investigation of the surface before and after injection is done by atomic force microscopy in the nondestructive dynamic mode (FM-AFM) under ultra-high vacuum conditions.