| Literature DB >> 15826091 |
E Dulkeith1, M Ringler, T A Klar, J Feldmann, A Muñoz Javier, W J Parak.
Abstract
The fluorescence quantum yield of Cy5 molecules attached to gold nanoparticles via ssDNA spacers is measured for Cy5-nanoparticle distances between 2 and 16 nm. Different numbers of ssDNA per nanoparticle allow to fine-tune the distance. The change of the radiative and nonradiative molecular decay rates with distance is determined using time-resolved photoluminescence spectroscopy. Remarkably, the distance dependent quantum efficiency is almost exclusively governed by the radiative rate.Entities:
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Year: 2005 PMID： 15826091 DOI： 10.1021/nl0480969
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189