Fluorescence Intermittency in Single InP Quantum Dots

Masaru Kuno; David P. Fromm; Alan Gallagher; David J. Nesbitt; Olga I. Micic; Arthur J. Nozik

doi:10.1021/nl010049i

Fluorescence Intermittency in Single InP Quantum Dots

Masaru Kuno, David P. Fromm, Alan Gallagher, David J. Nesbitt, Olga I. Micic, Arthur J. Nozik

Chemistry and Nanoscience

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Abstract

Fluorescence "blinking" kinetics of isolated colloidal InP quantum dots (QDs) are investigated via confocal single molecule microscopy. Analysis of fluorescence trajectories reveals inverse power law behavior (∞ 1/τ^m) in on/off time probability densities with m_on ≈ 2.0(2) and m_off ≈ 1.5(1). Such an inverse power law in both on/off times is inconsistent with a static distribution of electron/hole trapping sites and highlights the role of fluctuations in the QD nanoenvironment.

Original language	American English
Pages (from-to)	557-564
Number of pages	8
Journal	Nano Letters
Volume	1
Issue number	10
DOIs	https://doi.org/10.1021/nl010049i https://doi.org/10.1021/nl010049i
State	Published - 2001

NREL Publication Number

NREL/JA-590-32023

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author = "Masaru Kuno and Fromm, {David P.} and Alan Gallagher and Nesbitt, {David J.} and Micic, {Olga I.} and Nozik, {Arthur J.}",

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T1 - Fluorescence Intermittency in Single InP Quantum Dots

AU - Kuno, Masaru

AU - Fromm, David P.

AU - Gallagher, Alan

AU - Nesbitt, David J.

AU - Micic, Olga I.

AU - Nozik, Arthur J.

PY - 2001

Y1 - 2001

N2 - Fluorescence "blinking" kinetics of isolated colloidal InP quantum dots (QDs) are investigated via confocal single molecule microscopy. Analysis of fluorescence trajectories reveals inverse power law behavior (∞ 1/τm) in on/off time probability densities with mon ≈ 2.0(2) and moff ≈ 1.5(1). Such an inverse power law in both on/off times is inconsistent with a static distribution of electron/hole trapping sites and highlights the role of fluctuations in the QD nanoenvironment.

AB - Fluorescence "blinking" kinetics of isolated colloidal InP quantum dots (QDs) are investigated via confocal single molecule microscopy. Analysis of fluorescence trajectories reveals inverse power law behavior (∞ 1/τm) in on/off time probability densities with mon ≈ 2.0(2) and moff ≈ 1.5(1). Such an inverse power law in both on/off times is inconsistent with a static distribution of electron/hole trapping sites and highlights the role of fluctuations in the QD nanoenvironment.

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U2 - 10.1021/nl010049i

DO - 10.1021/nl010049i

M3 - Article

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SN - 1530-6984

VL - 1

SP - 557

EP - 564

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Fluorescence Intermittency in Single InP Quantum Dots

Abstract

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