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Laser tuning of resonance energy transfer efficiency in a quantum dot– bacteriorhodopsin nano–bio hybrid material
Author(s): Victor Krivenkov; Pavel Samokhvalov; Alexander A. Chistyakov; Igor Nabiev
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Paper Abstract

Semiconductor quantum dots (QDs) are a promising “nano-antennas” capable of absorbing efficiently light energy upon one- or two-photon excitation and then transferring it to convenient energy acceptors via Förster resonance energy transfer (FRET). The photosensitive protein bacteriorhodopsin (bR) has been shown to be a promising material for optoelectronic and photovoltaic applications, but it cannot effectively absorb light in the UV, blue, and NIR regions. It was shown previously that formation of hybrid complexes of QDs and purple membranes (PMs) containing bR could significantly improve the bR capacity for utilizing light upon one- and two-photon laser excitations. Under the laser irradiation, the optical properties of bR itself remain unchanged, whereas those of QDs may be altered. Therefore, it is important to study the effects of intense laser excitation on the properties of the QD–PM hybrid material. In this study we have shown that laser irradiation can lead to an increase in the luminescence quantum yield (QY) of QDs. The fact that this irradiation does not change the QD absorption spectra means that the QD quantum yield may be optically controlled without changing the QD structure or composition. Finally, we have shown experimentally that photoinduced increase in the QY of QDs lead to the corresponding increase in the efficiency of FRET in the QD–PM hybrid material. As a result, an approach to increasing the FRET efficiency in hybrid nano-biomaterials where QDs serve as donors have been proposed.

Paper Details

Date Published: 4 May 2018
PDF: 6 pages
Proc. SPIE 10672, Nanophotonics VII, 106720Z (4 May 2018); doi: 10.1117/12.2306669
Show Author Affiliations
Victor Krivenkov, National Research Nuclear Univ. MEPhI (Russian Federation)
Pavel Samokhvalov, National Research Nuclear Univ. MEPhI (Russian Federation)
Alexander A. Chistyakov, National Research Nuclear Univ. MEPhI (Russian Federation)
Igor Nabiev, National Research Nuclear Univ. MEPhI (Russian Federation)
Univ. de Reims Champagne-Ardenne (France)


Published in SPIE Proceedings Vol. 10672:
Nanophotonics VII
David L. Andrews; Angus J. Bain; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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