Fluorescence enhancement of light-harvesting complex 2 from purple bacteria coupled to spherical gold nanoparticles
- Nicolaus Copernicus Univ., Torun (Poland). Inst. of Physics
- Ma Chung Univ., Malang (Indonesia). Ma Chung Research Center for Photosynthetic Pigments
- Univ. of Glasgow, Scotland (United Kingdom). Inst. of Molecular, Cell and Systems Biology
- Univ. Linz (Austria). Inst. fur Halbleiter-und Festkorperphysik
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.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0001035
- OSTI ID:
- 1065874
- Journal Information:
- Applied Physics Letters, Vol. 99, Issue 17; Related Information: PARC partners with Washington University in St. Louis (lead); University of California, Riverside; University of Glasgow, UK; Los Alamos National Laboratory; University of New Mexico; New Mexico Corsortium; North Carolina State University; Northwestern University; Oak Ridge National Laboratory; University of Pennsylvania; Sandia National Laboratories; University of Sheffield, UK; ISSN 0003-6951: APPLAB
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
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