Journal
NANO LETTERS
Volume 8, Issue 9, Pages 2896-2899Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl801685a
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Funding
- National Science Foundation [CHE 0616378]
- Air Force Office of Scientific Research [FA9550-04-1-0430]
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We present the synthesis and characterization of novel, ultrasmall PbSe magic-sized nanoclusters (MSCs). Unlike the syntheses of high-quality semiconductor nanoparticles, the MSC synthesis is straightforward, occurring at room temperature in air over several hours. MSCs have core diameters <2 nm and fluoresce in the near-infrared (900 nm) with remarkable quantum efficiencies consistently greater than 50%. The relatively slow growth of MSCs allows for a significant scale up of reaction volumes. Transfer to aqueous solvents has also been demonstrated, establishing MSCs as a potential new fluorophore for applications in biological imaging.
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