Berlin 2005 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 30: POSTER: Chemical physics
CPP 30.31: Poster
Dienstag, 8. März 2005, 16:30–18:30, Poster TU D
Colloidal 3D Photonic Crystals with Au55-Clustermaterials — •Birgit Mellis1, Günter Schön1, Günter Schmid2, and Ulrich Simon3 — 1Institut für Anorganische Chemie/ Festkörperchemie, Universität Duisburg-Essen, Schützenbahn 70, 45127 Essen — 2Institut für Anorganische Chemie, Universität Duisburg-Essen, Universitätsstr.5-7, 45117 Essen — 3Institut für Anorganische Chemie und Elektrochemie, RWTH Aachen, Prof.-Pirlet-Str.1, 52074 Aachen
A new kind of 3D-Photonic Crystal (PhC) showing bandgaps in the UV-Vis region is presented here. It is designed by the chemical bottom-up method out of suspensions of monodisperse polystyrene particles coated completely by monolayers of watersoluble Au55-nanoclusters. The crystals are prepared by different assembling strategies and the resulting bandgaps characterized by UV-Vis spectroscopy. The degree of order in the crystals is controlled by Atomic Force Microscopy and Optical Microscopy. Through choosing the polystyrene particle size the gap position of the PhCs can be tailored. The Au55-nanoclusters as ligandstabilized quantum dots show Single Electron Tunneling (SET) at room temperature through the ligand barrier between two adjacent clusters. The combination of photonic bandgap behaviour with SET in one system can serve as a means of lossless intern energy or information transfer between photons and electrons, a problem which has not been solved yet for PhCs.