Journal
NANO LETTERS
Volume 4, Issue 3, Pages 451-457Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0350938
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We demonstrate that the nanoscale assemblies of water-solubilized, oppositely charged CdSe/ZnS core/shell quantum dots and of quantum dots and nanogold particles make it possible to develop FRET-based sensors with a donor quenching efficiency close to 100%. The cw and time-resolved photoluminescence analysis of nanoassemblies with different donor-to-acceptor ratios demonstrates a prevalence of 1:1 complexes. Experimental data perfectly fit the mathematical simulation based on long-range FRET and a static model of the assembling of the oppositely charged nanoparticles. These assemblies are stable in biological fluids, suggesting new applications.
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