Ultrabright PbSe magic-sized clusters

被引：139

作者：

Evans, Christopher M. ^{[1
]}

Guo, Li ^{[1
]}

Peterson, Jeffrey J. ^{[1
]}

Maccagnano-Zacher, Sara ^{[2
]}

Krauss, Todd D. ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl801685a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：2896 / 2899

页数：4

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