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Single particle versus ensemble average: From power-law intermittency of a single quantum dot to quasistretched exponential fluorescence decay of an ensemble

Tang, Jau and Marcus, R. A. (2005) Single particle versus ensemble average: From power-law intermittency of a single quantum dot to quasistretched exponential fluorescence decay of an ensemble. Journal of Chemical Physics, 123 (20). Art. no. 204511. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:TANjcp05b

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Abstract

Light-induced diffusion-controlled electron transfer is proposed as an underlying mechanism for the intermittency (power law and breakdown) of a single quantum dot and ensemble-averaged fluorescence decay. The intensity decay can be approximated to a stretched exponential expression. The physical links to the free energy gap, reorganization energy, electronic coupling, and diffusion correlation times are discussed. A procedure is described for extracting these molecular-based parameters from experiments and is demonstrated with examples using existing data.


Item Type:Article
Additional Information:©2005 American Institute of Physics (Received 20 June 2005; accepted 3 October 2005; published online 1 December 2005) The authors acknowledge the support of the National Science Foundation and the Office of Naval Research. J.T. also thanks the support by the James W. Glanville Foundation at the California Institute of Technology. J.T. benefited from a discussion with Dr. Chung and Professor Bawendi about their experiments that are central to this study.
Subject Keywords:quantum dots; fluorescence; diffusion; energy gap
Record Number:CaltechAUTHORS:TANjcp05b
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TANjcp05b
Alternative URL:http://dx.doi.org/10.1063/1.2128409
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1536
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:27 Jan 2006
Last Modified:26 Dec 2012 08:44

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