title: Time-dependent photoluminescence blue shift of the quantum dots in living cells: effect of oxidation by singlet oxygen.
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.
authors.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.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jia
authors.initials: J
authors.lastname: He
authors.forename: Pei-Nan
authors.initials: PN
authors.lastname: Wang
authors.forename: Ji-Yao
authors.initials: JY
authors.lastname: Chen
authors.forename: Zhou-Jun
authors.initials: ZJ
authors.lastname: Lu
authors.forename: Da-Ru
authors.initials: DR
authors.lastname: Lu
authors.forename: Jia
authors.initials: J
authors.lastname: Guo
authors.forename: Chang-Chun
authors.initials: CC
authors.lastname: Wang
authors.forename: Wu-Li
authors.initials: WL
authors.lastname: Yang
mesh_terms: 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
chemical_list: D019187:Cadmium Compounds; D026082:Singlet Oxygen; D013691:Tellurium; C028337:cadmium telluride