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

Escalantet, Maryana and Lenferink, Aufried and Zhao, Yiping and Tas, Niels and Huskens, Jurriaan and Hunter, C. Neil and Subramaniam, Vinod and Otto, Cees (2010) Long-Range Energy Propagation in Nanometer Arrays of Light Harvesting Antenna Complexes. Nano Letters, 10 (4). pp. 1450-1457. ISSN 1530-6984

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Abstract:	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.
Item Type:	Article
Copyright:	© 2010 American Chemical Society
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS) Science and Technology (TNW)
Research Group:	Transducers Science and Technology (TST) Molecular Nanofabrication (MNF) Nano-Biophysics (NBP) Medical Cell BioPhysics (MCBP)
Link to this item:	http://purl.utwente.nl/publications/75254
Official URL:	http://dx.doi.org/10.1021/nl1003569
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Metis ID: 268482