Long-Range Energy Propagation in Nanometer Arrays of Light Harvesting Antenna Complexes

被引：62

作者：

Escalante, Maryana ^{[1
]}

Lenferink, Aufried ^{[1
]}

Zhao, Yiping ^{[1
]}

Tas, Niels ^{[1
]}

Huskens, Jurriaan ^{[1
]}

Hunter, C. Neil ^{[2
]}

Subramaniam, Vinod ^{[1
]}

Otto, Cees ^{[1
]}

机构：

[1] Univ Twente, Inst Nanotechnol, MESA, NL-7500 AE Enschede, Netherlands

[2] Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England

来源：

NANO LETTERS | 2010年 / 10卷 / 04期

基金：

英国生物技术与生命科学研究理事会;

关键词：

Energy propagation; excitonic transport; light harvesting complexes; nanoimprint lithography; host-guest interactions; ATOMIC-FORCE MICROSCOPY; SINGLE LH2 COMPLEXES; RHODOBACTER-SPHAEROIDES; PHOTOSYNTHETIC BACTERIA; PURPLE BACTERIUM; FLUORESCENCE; MEMBRANES; ARCHITECTURE; LITHOGRAPHY; FLEXIBILITY;

D O I：

10.1021/nl1003569

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here we report the first observation of long-range transport of excitation energy within a biomimetic molecular nanoarray constructed from LH2 antenna complexes from Rhodobacter sphaeroides. Fluorescence microscopy of the emission of light after local excitation with a diffraction-limited light beam reveals long-range transport of excitation energy over micrometer distances, which is much larger than required in the parent bacterial system. The transport was established from the influence of active energy-guiding layers on the observed fluorescence emission. We speculate that such an extent of energy migration occurs as a result of efficient coupling between many hundreds of LH2 molecules. These results demonstrate the potential for long-range energy propagation in hybrid systems composed of natural light harvesting antenna molecules from photosynthetic organisms.

引用

页码：1450 / 1457

页数：8

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