Blinking mechanism of colloidal semiconductor quantum dots: Blinking mechanisms |
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| Authors: | Mitra Dutta Michael A Stroscio Milana Vasudev Dinakar Ramadurai Leianne Torres Bruce J West |
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| Affiliation: | (1) Nano Engineering Research Laboratory, Electrical and Computer Engineering, and Physics Departments, University of Illinois at Chicago, Chicago, IL 60607, USA;(2) Nano Engineering Research Laboratory, BioEngineering Department, University of Illinois at Chicago, Chicago, IL 60607, USA;(3) US Army Research Office, P.O. Box 12211, Research Triangle Park, NC 27709–2211 Adelphi, USA |
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| Abstract: | Nanoscale semiconductor quantum dots in colloidal suspensions are observed to blink with off times, τoff, that scale as 1/τ < eqid2 > 3/2. In this paper, it is shown by relating the fluctuations of the surface charge density on the quantum dot to fluctuations
in the double layer potential, that the related fluctuations in the barrier potential have exactly the functional form needed
to result in an inverse-power-law distribution for off times. |
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| Keywords: | Double-layer potential Lévy distribution Quantum dots Blinking |
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