Recombination rates for single colloidal quantum dots near a smooth metal film

Xiaohua Wu; Yugang Sun; Matthew Pelton

doi:10.1039/B903053K

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Physical Chemistry Chemical Physics

Issue 28, 2009

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Recombination rates for single colloidal quantum dots near a smooth metal film

Xiaohua Wu , Yugang Sun and Matthew Pelton

Phys. Chem. Chem. Phys., 2009, 11, 5867-5870

DOI: 10.1039/B903053K
Received 13 Feb 2009, Accepted 21 May 2009
First published on the web 05 Jun 2009
This article is part of the collection: Nanophotonics: Plasmonics and metal nanoparticles

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This paper presents experimental distributions of recombination rates for excitons in individual CdSe–ZnS core–shell quantum dots separated from a smooth gold film by a nanometre-scale dielectric layer. By measuring emission kinetics as a function of time, we obtain intrinsic recombination rates for single quantum dots. The distribution of recombination rates broadens and its maximum value increases as the separation between the dots and the metal decreases. The results agree with a semiclassical model that takes into account the randomly oriented two-dimensional dipole moments of the quantum dots.

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Physical Chemistry Chemical Physics

Recombination rates for single colloidal quantum dots near a smooth metal film

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