Continuous distribution of emission states from single CdSe/ZnS quantum dots

Kai Zhang; Hauyee Chang; Aihua Fu; A. Paul Alivisatos; Haw Yang

doi:10.1021/nl060483q

Continuous distribution of emission states from single CdSe/ZnS quantum dots

Kai Zhang, Hauyee Chang, Aihua Fu, A. Paul Alivisatos, Haw Yang

Research output: Contribution to journal › Article › peer-review

228 Scopus citations

Abstract

The photoluminescence dynamics of colloidal CdSe/ZnS/streptavidin quantum dots were studied using time-resolved single-molecule spectroscopy. Statistical tests of the photon-counting data suggested that the simple "on/off" discrete state model is inconsistent with experimental results. Instead, a continuous emission state distribution model was found to be more appropriate. Autocorrelation analysis of lifetime and intensity fluctuations showed a nonlinear correlation between them. These results were consistent with the model that charged quantum dots were also emissive, and that time-dependent charge migration gave rise to the observed photoluminescence dynamics.

Original language	English (US)
Pages (from-to)	843-847
Number of pages	5
Journal	Nano Letters
Volume	6
Issue number	4
DOIs	https://doi.org/10.1021/nl060483q
State	Published - Apr 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Mechanical Engineering
Bioengineering
General Materials Science

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10.1021/nl060483q

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title = "Continuous distribution of emission states from single CdSe/ZnS quantum dots",

abstract = "The photoluminescence dynamics of colloidal CdSe/ZnS/streptavidin quantum dots were studied using time-resolved single-molecule spectroscopy. Statistical tests of the photon-counting data suggested that the simple {"}on/off{"} discrete state model is inconsistent with experimental results. Instead, a continuous emission state distribution model was found to be more appropriate. Autocorrelation analysis of lifetime and intensity fluctuations showed a nonlinear correlation between them. These results were consistent with the model that charged quantum dots were also emissive, and that time-dependent charge migration gave rise to the observed photoluminescence dynamics.",

author = "Kai Zhang and Hauyee Chang and Aihua Fu and Alivisatos, {A. Paul} and Haw Yang",

year = "2006",

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doi = "10.1021/nl060483q",

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pages = "843--847",

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T1 - Continuous distribution of emission states from single CdSe/ZnS quantum dots

AU - Zhang, Kai

AU - Chang, Hauyee

AU - Fu, Aihua

AU - Alivisatos, A. Paul

AU - Yang, Haw

PY - 2006/4

Y1 - 2006/4

N2 - The photoluminescence dynamics of colloidal CdSe/ZnS/streptavidin quantum dots were studied using time-resolved single-molecule spectroscopy. Statistical tests of the photon-counting data suggested that the simple "on/off" discrete state model is inconsistent with experimental results. Instead, a continuous emission state distribution model was found to be more appropriate. Autocorrelation analysis of lifetime and intensity fluctuations showed a nonlinear correlation between them. These results were consistent with the model that charged quantum dots were also emissive, and that time-dependent charge migration gave rise to the observed photoluminescence dynamics.

AB - The photoluminescence dynamics of colloidal CdSe/ZnS/streptavidin quantum dots were studied using time-resolved single-molecule spectroscopy. Statistical tests of the photon-counting data suggested that the simple "on/off" discrete state model is inconsistent with experimental results. Instead, a continuous emission state distribution model was found to be more appropriate. Autocorrelation analysis of lifetime and intensity fluctuations showed a nonlinear correlation between them. These results were consistent with the model that charged quantum dots were also emissive, and that time-dependent charge migration gave rise to the observed photoluminescence dynamics.

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JO - Nano Letters

JF - Nano Letters

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ER -

Continuous distribution of emission states from single CdSe/ZnS quantum dots

Abstract

All Science Journal Classification (ASJC) codes

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