Synthesis and Cell-Imaging Applications of Glutathione-Capped CdTe Quantum Dots


  • The authors would like to thank Dr. Yu Han and Dr. Lan Zhao for their assistance in TEM characterization, and Zichao Yang for his assistance with LC-MS measurements. This work was funded by the Institute of Bioengineering and Nanotechnology (Agency for Science, Technology and Research, Singapore).


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Glutathione-capped CdTe quantum dots (QDs) are successfully synthesized in aqueous solution. Their fluorescence emissions are tunable between 500 and 650 nm. The as-prepared QDs have a quantum yield (QY) of up to 45 % (see figure), which is comparable to or better than most QDs prepared by using an organometallic route. The glutathione-capped CdTe QDs are successfully conjugated with bioprobes for cell-imaging applications.