Regensburg 2004 – scientific programme

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HL: Halbleiterphysik

HL 44: Poster II

HL 44.33: Poster

Thursday, March 11, 2004, 16:30–19:00, Poster A

Fluorescence and Scattering Properties of Composites made from Gold and Semicoductor Nanoparticles — •Melanie M. de Souza, Eric Dulkeith, Gunar Raschke, Andrey L. Rogach, Thomas A. Klar, and Jochen Feldmann — Photonics and Optoelectronics Group, Department of Physics and CeNS, Ludwig-Maximilians -Universität, Amalienstr. 54 D-80799 Munich, Germany

In the last decade there has been considerable interest in the field of nanostructured materials. Intense research has centred on controlling the surface properties of both metal and semiconductor nanoparticles (NPs) to determine the surface/property relationships. Here we report on a composite system comprising of stable colliods of both metal (Au) and semiconductor (CdTe) NPs in solutions. In this composite system we observe both efficient quenching of CdTe NP fluorescence and a change in the scattering spectra of Au NPs. By creating well-defined spacer units between nanoparticles (through the self-assembly of polyelectrolyte films or the formation of a covalent bond) the distance-dependent fluorescence of CdTe NPs is also investigated.