Quantum dot photon statistics measured by three-dimensional particle tracking

被引：0

作者：

McHale, Kevin ^{[1
]}

Berglund, Andrew J. ^{[1
]}

Mabuchi, Hideo ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 11期

关键词：

D O I：

10.1021/nl0723376

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present an instrument for performing correlation spectroscopy on single fluorescent particles while tracking their Brownian motion in three dimensions using real-time feedback. By tracking CdSe/ZnS quantum dots in water (diffusion coefficient similar to 20 mu m(2)/s), we make the first measurements of photon antibunching (at similar to 10 ns) on single fluorophores free in solution and find fluorescence lifetime heterogeneity within a quantum dot sample. In addition, we show that 2-mercaptoethanol suppresses short time-scale intermittency (1 ms to 1 s) in quantum dot fluorescence by reducing time spent in the off-state.

引用

页码：3535 / 3539

页数：5

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