Bright and Stable Purple/Blue Emitting CdS/ZnS Core/Shell Nanocrystals Grown by Thermal Cycling Using a Single-Source Precursor
by Chen, D. A.; Zhao, F.; Qi, H.; Rutherford, M.; Peng, X. G.
A new approach for synthesis of high quality core/shell nanocrystals, "thermal-cycling coupled single precursor" (TC-SP), was developed. It was applied for the synthesis of high efficiency, good color purity, nearly monodisperse, alloying-free, and stable CdS/ZnS core/shell nanocrystals with their emission peak tunable between 375 and 475 nm. A comparison study on TC-SP versus the classic successive ionic layer adsorption and reaction (SILAR), both in one pot, revealed that, although the reaction temperature was significantly reduced and the procedure was simplified for TC-SP, the overall quality of the CdS/ZnS core/shell nanocrystals yielded by TC-SP was found to be superior. A quantitative chemical etching method was developed for determining the radial distribution of elements in bandgap/composition engineered nanocrystals.
- Journal
- Chemistry of Materials
- Volume
- 22
- Issue
- 4
- Year
- 2010
- Start Page
- 1437-1444
- URL
- https://dx.doi.org/10.1021/cm902516f
- ISBN/ISSN
- 1520-5002; 0897-4756
- DOI
- 10.1021/cm902516f