Spectral dependence of fluorescence enhancement in LH2-Au nanoparticle hybrid nanostructures

Bujak, L., Brotosudarmo, T.H.P., Czechowski, N., Olejnik, M., Ciszak, K., Litvin, R., Cogdell, R.J. , Heiss, W. and Mackowski, S. (2012) Spectral dependence of fluorescence enhancement in LH2-Au nanoparticle hybrid nanostructures. Acta Physica Polonica A, 122(2), pp. 252-254.

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Publisher's URL: http://przyrbwn.icm.edu.pl/APP/ABSTR/122/a122-2-2.html

Abstract

We report on the influence of plasmon resonance in spherical gold nanoparticles on the optical properties of light-harvesting complex LH2 from the purple bacteria Rhodopseudomonas palustris. Systematic studies as a function of the excitation energy and the separation distance indicate that metal enhanced fluorescence shows strong dependence upon both of these parameters. We observe substantial increase of the fluorescence from LH2 complex in a hybrid nanostructure with 12 nm silica spacer. On the other hand, the enhancement measured with laser tuned into the plasmon resonance is almost threefold compared to the off-resonance configuration. The enhancement of fluorescence intensity originates in both cases from the increase of carotenoid absorption in the LH2 complex.

Item Type:Articles
Additional Information:First presented at the WELCOME Scientific Meeting on Hybrid Nanostructures, Torun, Poland, 28-31 Aug 2011
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard
Authors: Bujak, L., Brotosudarmo, T.H.P., Czechowski, N., Olejnik, M., Ciszak, K., Litvin, R., Cogdell, R.J., Heiss, W., and Mackowski, S.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Acta Physica Polonica A
ISSN:0587-4246

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