Time-dependent photoluminescence blue shift of the quantum dots in living cells: effect of oxidation by singlet oxygen |
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| Authors: | Zhang Yu He Jia Wang Pei-Nan Chen Ji-Yao Lu Zhou-Jun Lu Da-Ru Guo Jia Wang Chang-Chun Yang Wu-Li |
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| Affiliation: | State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Key Laboratory of Molecular Engineering of Polymers, and Institute of Genetics, Fudan University, Shanghai, China. |
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| Abstract: | Time-dependent photoluminescence (PL) enhancement, blue shift, and photobleach were observed from the thiol-capped CdTe quantum dots (QDs) ingested in mouse myoblast cells and human primary liver cancer cells. It was revealed that the PL blue shift resulted from the photooxidation of the QD core by singlet oxygen molecules formed on the QD core surface. |
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