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| 水溶性的CdSe/CdS/ZnS量子点的合成及表征 | |
| 引用本文： | 杨芳芳,于俊生,谢 颖. 水溶性的CdSe/CdS/ZnS量子点的合成及表征[J]. 无机化学学报, 2008, 24(7): 1142-1147 |
| 作者姓名： | 杨芳芳 于俊生 谢 颖 |
| 作者单位： | 南京大学化学化工学院,教育部生命分析化学重点实验室,南京,210093 |
| 基金项目： | 国家自然科学基金 , 国家自然科学基金 , 国家留学人员回国项目 |
| 摘 要： | 用L-半胱氨酸盐(Cys)作为稳定剂，合成了水溶性的双壳结构的CdSe/CdS/ZnS半导体量子点。吸收光谱和荧光光谱结果表明，双壳结构的CdSe/CdS/ZnS纳米微粒比单一的CdSe核纳米粒子和单核壳结构的CdSe/CdS纳米粒子具有更优异的发光特性。用透射电子显微镜(TEM)、ED、XRD、XPS和FTIR等方法对CdSe核和双壳层的CdSe/CdS/ZnS纳米微粒的结构、分散性及形貌分别进行了表征。 |
| 关 键 词： | L-半胱氨酸； CdSe； CdSe/CdS/ZnS； 量子点 |
Synthesis and Characterization of Water-soluble CdSe/CdS/ZnS Core-shell Quantum Dots |
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| YANG Fang-Fang,YU Jun-Sheng and XIE Ying. Synthesis and Characterization of Water-soluble CdSe/CdS/ZnS Core-shell Quantum Dots[J]. Chinese Journal of Inorganic Chemistry, 2008, 24(7): 1142-1147 | |
| Authors: | YANG Fang-Fang YU Jun-Sheng XIE Ying |
| Affiliation: | Key Laboratory of Analytical Chemistry for Life Science of Ministry of Education of China, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093,Key Laboratory of Analytical Chemistry for Life Science of Ministry of Education of China, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 and Key Laboratory of Analytical Chemistry for Life Science of Ministry of Education of China, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 |
| Abstract: | The water-soluble CdSe/CdS/ZnS core-shell quantum dots (QDs) have been prepared by using L-cysteine as stabilizer in aqueous phase. The optical properties of CdSe core and the influence of shell CdS and two-shelled CdS/ZnS on the CdSe core were studied by UV-Vis absorption and fluorescence spectroscopy. As compared to the CdSe core, the absorption peaks and the maximum emission wavelengths of CdSe/CdS, CdSe/CdS/ZnS core-shell structure showed a slight redshift. The remarkable emission enhancements in intensity were observed with factors of 3.7, 4.5 for CdSe/CdS and CdSe/CdS/ZnS QDs, respectively. TEM, ED and XPS were used to characterize the size, shape and composition of prepared nanoparticles. The results of FTIR show that sulfur and oxygen atom in L-cysteine molecules take part in coordination with metal ions on the surface of the nanoparticles. These results disclose that the as prepared CdSe/CdS/ZnS QDs in this report have the superior chemical stability and favorable photoluminescence properties. |
| Keywords: | L-cysteine CdSe CdSe/CdS/ZnS quantum dots |
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