Zn/Cd ratio-dependent synthetic conditions in ternary ZnCdS quantum dots
| Autor: | Yongbo Wang, Jun Fan, Yingkun Ren, Xiaoyun Hu, Min Yang, Enzhou Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Materials science Photoluminescence Mechanical Engineering Metal ions in aqueous solution Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Blueshift Absorbance Mechanics of Materials Quantum dot Materials Chemistry Emission spectrum 0210 nano-technology Ternary operation Nuclear chemistry |
| Zdroj: | Journal of Alloys and Compounds. 752:260-266 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.04.084 |
| Popis: | In our study, the synthesis conditions of ternary alloyed ZnCdS quantum dots (QDs) with different Zn/Cd molar ratios were investigated. Our results indicated that the optimal reaction conditions of ZnCdS QDs with various molar ratios were different. The ternary ZnCdS QDs were synthesized by a rather simple, facile, low-cost and effective aqueous synthesis method using air-stable compounds. UV–visible (UV–Vis) absorbance and photoluminescence (PL) emission spectra of the ZnCdS QDs showed a blue shift with the decrease of Cd, indicating the formation of alloyed QDs. The optimal reaction conditions, such as refluxing time and S/(Zn+Cd) molar ratios were different for ZnCdS QDs with different Zn/Cd ratios. The cause of the difference was attributed to the different properties of metal ions. In addition, the investigation on the photostability showed that the as-prepared ternary alloyed QDs had strong light resistance. Therefore, the ternary alloyed QDs with outstanding optical properties and high photostability showed potential biological applications and the results also offered new insights for the synthesis of ZnCdS QDs. |
| Databáze: | OpenAIRE |
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