Journal
NANO LETTERS
Volume 10, Issue 6, Pages 2069-2074Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl100254j
Keywords
Photosystem I; plasmon enhancement
Categories
Funding
- ISF [1714/07]
- James Frank program of Light Matter Interaction
- National Science Foundation [CBET-0933415]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0933415] Funding Source: National Science Foundation
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The photosystem I (PS I) protein is one of nature's most efficient light harvesting complexes and exhibits outstanding optoelectronic properties. Here we demonstrate how metal nanoparticles which act as artificial antennas can enhance the light absorption of the protein. This hybrid system shows an increase in light absorption and of circular dichroism over the entire absorption band of the protein rather than at the specific plasmon resonance wavelength of spherical metal nanoparticles (NPs). This is explained by broad-resonant and nonresonant field enhancements caused by metal NP aggregates, by the high dielectric constant of the metal, and by NP -PS I-NP antenna junctions which effectively enhance light absorption in the PS I.
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