Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)
O 41.33: Poster
Dienstag, 23. März 2010, 18:30–21:00, Poster B1
Metal complexation and monolayer self-assembly of the bio-organic semiconductor Alizarin — Neeti Uppal1,5, Norbert Gast1,3, Martin Bueno4, Wolfgang M. Heckl2,3, and •Frank Trixler1,2,3 — 1Dept. Earth and Environmental Sciences, Ludwig-Maximilians-Universität München (LMU) & Center for NanoSciences (CeNS), München, Germany — 2Dept. of Physics, Technische Universität München (TUM), Garching, Germany — 3Zentrum Neue Technologien, Deutsches Museum, München, Germany — 4Fakultät Feinwerk- und Mikrotechnik, Physikalische Technik, Hochschule München, Germany — 5Institut für Physik, Universität Augsburg, Germany
Organic Solid/Solid Wetting Deposition (OSWD) (Trixler et al.: Chem.Eur.J. 13 (2007), 7785) enables to deposit insoluble molecules such as organic pigments and semiconductors on substrate surfaces under ambient conditions. We explore the potential of OSWD to grow and manipulate monolayers of biomolecules and their chelates on graphite and use Alizarin as a model system - a natural organic compound which occurs mainly as an anthraquinone glycoside in plants.
Our investigations via Scanning Tunneling Microscopy (STM), Tunneling Spectroscopy (TS) and Molecular Modelling reveal that OSWD works also with bio-organic molecules and chelate complexes and show that the advantages of OSWD (self-assembly under ambient conditions in a non-solvent environment, nanomanipulation via molecular extraction) can all be tapped.