Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 4, Pages 1228-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja909663r
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Funding
- Office of Basic Energy Science of the Department of the Energy
- ND Energy Center
- Notre Dame Radiation Laboratory [NDRL-4837]
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Charge injection from excited CdSe quantum dots into nanostructured TiO2 Film can be modulated by varying Solution pH. At increasing Solution pH, the conduction band of TiO2 shifts 59 mV/pH unit to a more negative potential, thereby decreasing the driving force and thus decreasing the rate of nonradiative electron transfer from excited CdSe. The emission yield and the average emission lifetime increase with increasing pH, thus providing a way to monitor the variation in medium pH.
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