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# Resonance energy transfer from a fluorescent dye to a metal nanoparticle

Bhowmick, Somnath and Saini, Sangeeta and Shenoy, Vijay B and Bagchi, Biman (2006) Resonance energy transfer from a fluorescent dye to a metal nanoparticle. In: Journal of Chemical Physics, 125 (18). 181102-1-181102-6.

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## Abstract

A quantum mechanical theory of the rate of excitation energy transfer from a fluorescent dye molecule to the surface plasmonic modes of a spherical metal nanoparticle is presented. The theory predicts the distance dependence of the transfer rate to vary as $1/d ^ \sigma$, with \sigma =3–4 at intermediate distances, in partial agreement with the recent experimental results. Förster's $1/d^6$ dependence is recovered at large separations. The predicted rate exhibits nontrivial nanoparticle size dependence, ultimately going over to an asymptotic, $a^3$ size dependence. Unlike in conventional fluorescence resonance energy transfer, the orientational factor is found to vary between 1 and 4.

Item Type: Journal Article Copyright of this article belongs to American Institute of Physics. Division of Chemical Sciences > Materials Research CentreDivision of Chemical Sciences > Solid State & Structural Chemistry Unit 12 May 2008 19 Sep 2010 04:44 http://eprints.iisc.ernet.in/id/eprint/13967

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