Time-dependent photoluminescence blue shift of the quantum dots in living cells: effect of oxidation by singlet oxygen.
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.
Zhang
Yu
Y
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.
He
Jia
J
Wang
Pei-Nan
PN
Chen
Ji-Yao
JY
Lu
Zhou-Jun
ZJ
Lu
Da-Ru
DR
Guo
Jia
J
Wang
Chang-Chun
CC
Yang
Wu-Li
WL
D000818:Animals; D015374:Biosensing Techniques / Q000379:methods*; D019187:Cadmium Compounds / Q000737:chemistry*; D045744:Cell Line, Tumor; D006801:Humans; D007089:Image Enhancement; D008099:Liver / Q000166:cytology / Q000473:pathology; D049449:Luminescence; D051379:Mice; D032446:Myoblasts / Q000166:cytology / Q000473:pathology; D010084:Oxidation-Reduction; D038761:Photobleaching; D045663:Quantum Dots; D026082:Singlet Oxygen / Q000737:chemistry*; D013057:Spectrum Analysis; D013691:Tellurium / Q000737:chemistry*; D013997:Time Factors
D019187:Cadmium Compounds; D026082:Singlet Oxygen; D013691:Tellurium; C028337:cadmium telluride