Ultrabright PbSe magic-sized clusters.
作者： Christopher M. Evans , Li Guo , Jeffrey J. Peterson , Sara Maccagnano-Zacher , Todd D. Krauss
DOI: 10.1021/NL801685A
关键词: Aqueous solution 、 Fluorescence 、 Biological imaging 、 Quantum yield 、 Fluorophore 、 Nanotechnology 、 Slow growth 、 Semiconductor Nanoparticles 、 Chemistry 、 Nanoclusters
摘要: We present the synthesis and characterization of novel, ultrasmall PbSe magic-sized nanoclusters (MSCs). Unlike syntheses high-quality semiconductor nanoparticles, MSC is straightforward, occurring at room temperature in air over several hours. MSCs have core diameters <2 nm fluoresce near-infrared (900 nm) with remarkable quantum efficiencies consistently greater than 50%. The relatively slow growth allows for a significant scale up reaction volumes. Transfer to aqueous solvents has also been demonstrated, establishing as potential new fluorophore applications biological imaging.
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