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Spectrally Resolved Resonance Energy Transfer from ZnO:MgO Nanocrystals

Rakshit, Sabyasachi and Vasudevan, Sukumaran (2009) Spectrally Resolved Resonance Energy Transfer from ZnO:MgO Nanocrystals. In: Jouurnal of Physical chemistry, 113 (37). pp. 16424-16431.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp906202e

Abstract

Resonance energy transfer (RET) from the visible emission of core−shell ZnO:MgO nanocrystals to Nile Red chromophores, following band gap excitation in the UV, has been investigated for four different nanocrystal sizes. With use of steady state and time-resolved fluorescence spectroscopic measurements the wavelength dependent RET efficiencies have been determined. The RET process in ZnO:MgO nanocrystals occurs from emissions involving trap state recombination. There are two such processes with different RET efficiencies for the same particle size. This is shown to be a consequence of the fact that the recombination processes giving rise to the two emissions are located at different distances from the center of the particle so that the donor−acceptor distances for the two are different, even for the same particle size.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 16 Dec 2009 09:05
Last Modified: 19 Sep 2010 05:46
URI: http://eprints.iisc.ernet.in/id/eprint/23653

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