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

Zhihua Xu, Mircea Cotlet

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationSingle Molecule Spectroscopy and Imaging III
Volume7571
DOIs
StatePublished - May 6 2010
EventSingle Molecule Spectroscopy and Imaging III - San Francisco, CA, United States
Duration: Jan 23 2010Jan 25 2010

Other

OtherSingle Molecule Spectroscopy and Imaging III
CountryUnited States
CitySan Francisco, CA
Period1/23/101/25/10

Keywords

  • Fluorescence lifetime
  • Fullerene
  • Photoinduced electron transfer
  • Quantum dots
  • Single molecule spectroscopy

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