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Issue 106, 2016
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Predicting signatures of anisotropic resonance energy transfer in dye-functionalized nanoparticles

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Abstract

Resonance energy transfer (RET) is an inherently anisotropic process. Even the simplest, well-known Förster theory, based on the transition dipole–dipole coupling, implicitly incorporates the anisotropic character of RET. In this theoretical work, we study possible signatures of the fundamental anisotropic character of RET in hybrid nanomaterials composed of a semiconductor nanoparticle (NP) decorated with molecular dyes. In particular, by means of a realistic kinetic model, we show that the analysis of the dye photoluminescence difference for orthogonal input polarizations reveals the anisotropic character of the dye–NP RET which arises from the intrinsic anisotropy of the NP lattice. In a prototypical core/shell wurtzite CdSe/ZnS NP functionalized with cyanine dyes (Cy3B), this difference is predicted to be as large as 75% and it is strongly dependent in amplitude and sign on the dye–NP distance. We account for all the possible RET processes within the system, together with competing decay pathways in the separate segments. In addition, we show that the anisotropic signature of RET is persistent up to a large number of dyes per NP.

Graphical abstract: Predicting signatures of anisotropic resonance energy transfer in dye-functionalized nanoparticles

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Supplementary files

Article information


Submitted
07 Sep 2016
Accepted
25 Oct 2016
First published
25 Oct 2016

This article is Open Access

RSC Adv., 2016,6, 104648-104656
Article type
Paper

Predicting signatures of anisotropic resonance energy transfer in dye-functionalized nanoparticles

G. Gil, S. Corni, A. Delgado, A. Bertoni and G. Goldoni, RSC Adv., 2016, 6, 104648
DOI: 10.1039/C6RA22433D

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