Continuous Distribution of Emission States from Single CdSe/ZnS Quantum Dots
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- 21 March 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 6 (4) , 843-847
- https://doi.org/10.1021/nl060483q
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.Keywords
This publication has 14 references indexed in Scilit:
- Detection of Intensity Change Points in Time-Resolved Single-Molecule MeasurementsThe Journal of Physical Chemistry B, 2004
- Simple model for the power-law blinking of single semiconductor nanocrystalsPhysical Review B, 2002
- Fluorescence Decay Time of Single Semiconductor NanocrystalsPhysical Review Letters, 2002
- Bunching and antibunching in the fluorescence of semiconductor nanocrystalsOptics Letters, 2001
- “On”/“off” fluorescence intermittency of single semiconductor quantum dotsThe Journal of Chemical Physics, 2001
- Blinking statistics in single semiconductor nanocrystal quantum dotsPhysical Review B, 2001
- Pseudopotential calculations of electron and hole addition spectra of InAs, InP, and Si quantum dotsPhysical Review B, 2000
- Evidence of photo- and electrodarkening of (CdSe)ZnS quantum dot compositesJournal of Applied Physics, 2000
- Single-Molecule Identification of Coumarin-120 by Time-Resolved Fluorescence Detection: Comparison of One- and Two-Photon Excitation in SolutionThe Journal of Physical Chemistry A, 1997
- Fluorescence intermittency in single cadmium selenide nanocrystalsNature, 1996