Dresden 2011 – scientific programme
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MO: Fachverband Molekülphysik
MO 26: Poster: Biomolecules
MO 26.3: Poster
Thursday, March 17, 2011, 16:00–18:00, P2
Plasmonic Enhancement of Light Harvesting Complex-Fluorescence — •Sebastian R. Beyer1, Simon Ullrich2, Stefan Kudera2, Richard J. Cogdell3, and Jürgen Köhler1 — 1Experimental Physics IV and Bayreuther Institut für Makromolekülforschung (BIMF), University of Bayreuth, 95440 Bayreuth, Germany — 2Max-Planck-Institute for Metals Research, Dept. of New Materials and Biosystems, 70569 Stuttgart, Germany — 3Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, Biomedical Research Building, Glasgow G12 8QQ, Scotland, UK
We present the first evidence of plasmon induced fluorescence enhancement on Pigment-Protein-Complexes from Purple Bacteria. Using fluorescence microscopy, we recorded fluorescence intensities of single Light Harvesting Complex 2 molecules (LH2) from Rhodobacter sphaeroides in the presence of an ordered array of gold nano spheres. Evaluating the fluorescence intensities of more than 13000 single LH2, we found mean fluorescence enhancement up to factor 2.5 with the strongest single event reaching factor 13.7.