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Advanced Materials

Aqueous Synthesis of Glutathione-Capped ZnSe and Zn1–xCdxSe Alloyed Quantum Dots


  • The authors thank Dr. Yu Han for his assistance with TEM characterization. This work is funded by the Institute of Bioengineering and Nanotechnology (Biomedical Research Council, Agency for Science, Technology and Research, Singapore).


Glutathione-capped ZnSe and Zn1–xCdxSe alloyed quantum dots (QDs) have been successfully synthesized in aqueous solution (see figure). Their fluorescence emissions are tunable between 360 and 500 nm. The as-prepared QDs have a quantum yield of up to 50 %, comparable to or better than most QDs prepared by an organometallic route. The approach can be easily scaled up for commercial production of alloyed nanocrystals of various compositions.

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