Metal-enhanced fluorescence of chlorophylls in single light-harvesting complexes

被引：134

作者：

Mackowski, Sebastian ^{[1
]}

Wormke, Stephan ^{[1
]}

Maier, Andreas J. ^{[1
]}

Brotosudarmo, Tatas H. P. ^{[2
]}

Harutyunyan, Hayk ^{[1
]}

Hartschuh, Achim ^{[1
]}

Govorov, Alexander O. ^{[3
]}

Scheer, Hugo ^{[2
]}

Brauchle, Christoph ^{[1
]}

机构：

[1] Univ Munich, Ctr Nanosci, Dept Chem & Biochem, D-81377 Munich, Germany

[2] Univ Munich, Dept Biol, D-80638 Munich, Germany

[3] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 02期

关键词：

D O I：

10.1021/nl072854o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ensemble and single-molecule spectroscopy demonstrates that both emission and absorption of peridinin-chlorophyll-protein photosynthetic antennae can be largely enhanced through plasmonic interactions. We find up to 18-fold increase of the chlorophyll fluorescence for complexes placed near a silver metal layer. This enhancement, which leaves no measurable effects on the protein structure, is observed when exciting either chlorophyll or carotenoid and is attributed predominantly to an increase of the excitation rate in the antenna. The enhancement mechanism comes from plasmon-induced amplification of electromagnetic fields inside the complex. This result is an important step toward applying plasmonic nanostructures for controlling the optical response of complex biomolecules and improving the design and functioning of artificial light-harvesting systems.

引用

页码：558 / 564

页数：7

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