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

被引:65
作者
Tang, J [1 ]
Marcus, RA [1 ]
机构
[1] CALTECH, Natl Lab Chem Phys, Pasadena, CA 91125 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.2128409
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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. (c) 2005 American Institute of Physics.
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页数:6
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