Photoluminescence enhancement in CdSe/ZnS–DNA linked–Au nanoparticle heterodimers probed by single molecule spectroscopy

Mathew M. Maye; Oleg Gang; Mircea Cotlet

doi:10.1039/C0CC00660B

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Chemical Communications

Issue 33, 2010

Urgent high quality communications from across the chemical sciences.

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Photoluminescence enhancement in CdSe/ZnS–DNA linked–Au nanoparticle heterodimers probed by single molecule spectroscopy

Mathew M. Maye,^a Oleg Gang*^a and Mircea Cotlet*^a

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Brookhaven National Laboratory, 735 Brookhaven Ave., Upton, USA
E-mail: cotlet@bnl.gov ;
Fax: +1 631-344-7765 ;
Tel: +1 631-344-7778

Chem. Commun., 2010,46, 6111-6113

DOI: 10.1039/C0CC00660B
Received 29 Mar 2010, Accepted 23 Jun 2010
First published online 26 Jul 2010

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Abstract
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Photoluminescence enhancement of up to 20 fold is demonstrated at the single molecule level for heterodimers composed of a core/shell CdSe/ZnS semiconductive quantum dot and a gold nanoparticle of 60 nm size separated by a 32 nm-long dsDNA linker when employing optical excitation at wavelengths near the surface plasmon resonance of the gold nanoparticle.

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Details on nanoparticle functionalization with specific type of ssDNA, step by step protocol for heterodimer formation including ssDNA sequences used in the protocol, details on fluorescence correlation spectroscopy and single molecule spectroscopy experiments and data analysis
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