Fluorescence Intermittency in Single InP Quantum Dots

Fluorescence Intermittency in Single InP Quantum Dots

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...

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Veröffentlicht in:Nano letters 2001-10, Vol.1 (10), p.557-564
Hauptverfasser: Kuno, Masaru, Fromm, David P, Gallagher, Alan, Nesbitt, David J, Micic, Olga I, Nozik, Arthur J
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Sprache:eng
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Zusammenfassung: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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl010049i