Broad Band Enhancement of Light Absorption in Photosystem I by Metal Nanoparticle Antennas

被引：115
作者：
Carmeli, Itai [4 ,5 ]
Lieberman, Itai [4 ,5 ]
Kraversky, Leon [2 ,3 ]
Fan, Zhiyuan [1 ]
Govorov, Alexander O. [1 ]
Markovich, Gil [4 ,5 ]
Richter, Shachar [4 ,5 ]
机构：
[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA
[2] Tel Aviv Univ, Dept Biochem, IL-69978 Tel Aviv, Israel
[3] Tel Aviv Univ, Ctr NanoSci & Nanotechnol, IL-69978 Tel Aviv, Israel
[4] Tel Aviv Univ, Sch Chem, IL-69978 Tel Aviv, Israel
[5] Tel Aviv Univ, Ctr NanoSci & Nanotechnol, IL-69978 Tel Aviv, Israel
来源：
NANO LETTERS | 2010年 / 10卷 / 06期
基金：
美国国家科学基金会;
关键词：
Photosystem I; plasmon enhancement; PLASMON ENHANCEMENT; CIRCULAR-DICHROISM; ELECTRON-TRANSFER; FLUORESCENCE; SCATTERING; PROTEIN;
D O I：
10.1021/nl100254j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：2069 / 2074
页数：6
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