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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 55.9: Poster

Mittwoch, 27. Februar 2008, 18:30–19:30, Poster F

Fluorescence in the presence of metallic nanoparticles — •Philipp Reichenbach, Thomas Härtling, and Lukas M. Eng — Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden, Germany

When fluorescent molecules (being excited by incident light) are placed in the neighbourhood of metallic nanoparticles, big changes of the observed fluorescence rate can occur. On the one hand, the excitation of the molecule can be strongly enhanced as a result of the scattering of the exciting light at the nanoparticle. On the other hand, part of the fluorescent radiation will be absorbed by the nanoparticle. The dependence of these two factors from the system parameters like excitation wavelength, relative position of molecule and particle as well as surrounding medium was investigated. As a result, we are able to clearly identify set-ups for which enhanced fluorescence microscopy/spectroscopy becomes feasible.