High Quality ZnSe and ZnS Nanocrystals Formed by Activating Zinc Carboxylate Precursors

The nucleation and growth of ZnSe and ZnS nanocrystals in noncoordinating solvents is of interest as greener precursors can be used in place of traditional methods used to produce cadmium-based nanocrystals. In High Quality ZnSe and ZnS Nanocrystals Formed by Activating Zinc Carboxylate Precursors Lin Song Li, Narayan Pradhan, Yunjun Wang, and Xiaogang Peng describe a method to activate the precursor chemicals to produce high-quality ZnSe and ZnS nanocrystals. By activating the ligand precursors with amines that attack the carboxyl groups of the precursor, higher concentration and better control over PL parameters were possible versus when no amines were added. This led to ZnSe nanocrystals with quantum yields around 50% and full width half max peaks of just 12-15 nm. These methods proved to be a more successful formation technique than organometallic routes or those using a single precursor. For more information, read the full article here.

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