Single molecule fluorescence spectroscopy studies of photo-induced charge transfer between CdSe/ZnS quantum dots and fullerene

Zhihua Xu; Mircea Cotlet

doi:10.1117/12.845922

25 February 2010 Single-molecule fluorescence spectroscopy studies of photo-induced electron transfer between CdSe/ZnS quantum dots and fullerene

Zhihua Xu, Mircea Cotlet

Author Affiliations +

Proceedings Volume 7571, Single Molecule Spectroscopy and Imaging III; 75710M (2010) https://doi.org/10.1117/12.845922
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

Photo-induced electron transfer in CdSe/ZnS semiconductor quantum dot-fullerene conjugates was investigated by single molecule fluorescence spectroscopy. The average rate for photoinduced electron transfer is estimated around 10⁸s^-1. Quenching by electron transfer is observed in the "on" state and it manifests both as reduced fluorescence intensity and as shortening in fluorescence lifetime. As a result, the electron transfer changes the on/off dynamics of the fluorescence intensity of individual quantum dots.

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Zhihua Xu and Mircea Cotlet "Single-molecule fluorescence spectroscopy studies of photo-induced electron transfer between CdSe/ZnS quantum dots and fullerene", Proc. SPIE 7571, Single Molecule Spectroscopy and Imaging III, 75710M (25 February 2010); https://doi.org/10.1117/12.845922

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