Fluorescence enhancement of light-harvesting complex 2 from purple bacteria coupled to spherical gold nanoparticles

Bujak, Ł., Czechowski, N., Piatkowski, D., Litvin, R., Mackowski, S., Brotosudarmo, T.H.P., Cogdell, R.J. , Pichler, S. and Heiss, W. (2011) Fluorescence enhancement of light-harvesting complex 2 from purple bacteria coupled to spherical gold nanoparticles. Applied Physics Letters, 99(17), p. 173701. (doi:10.1063/1.3648113)

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Publisher's URL: http://dx.doi.org/10.1063/1.3648113

Abstract

The influence of plasmon excitations in spherical gold nanoparticles on the optical properties of a light-harvesting complex 2 (LH2) from the purple bacteria Rhodopseudomonas palustris has been studied. Systematic analysis is facilitated by controlling the thickness of a silica layer between Au nanoparticles and LH2 complexes. Fluorescence of LH2 complexes features substantial increase when these complexes are separated by 12 nm from the gold nanoparticles. At shorter distances, non-radiative quenching leads to a decrease of fluorescence emission. The enhancement of fluorescence originates predominantly from an increase of absorption of pigments comprising the LH2 complex. (C) 2011 American Institute of Physics. [doi:10.1063/1.3648113]

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard
Authors: Bujak, Ł., Czechowski, N., Piatkowski, D., Litvin, R., Mackowski, S., Brotosudarmo, T.H.P., Cogdell, R.J., Pichler, S., and Heiss, W.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Applied Physics Letters
ISSN:0003-6951

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