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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (08): 931-936. 上一篇    下一篇

研究论文

谷胱甘肽稳定水溶性CdTe/ZnTe量子点的制备与表征

徐昕，孔毅飞，贺蓉*，吉佳佳，崔大祥*   

  1. (纳米生物工程实验室 “薄膜与微细技术”教育部重点实验室 “微米/纳米加工技术”国家级重点实验室
    上海交通大学微纳科学技术研究院 上海 200240)
  • 投稿日期:2010-07-29 修回日期:2010-10-18 发布日期:2010-12-23
  • 通讯作者: 贺蓉 E-mail:rhe@sjtu.edu.cn; herongcp@gmail.com
  • 基金资助:

    国家973计划;国家863重点项目;国家自然科学基金项目;上海市科委纳米专项基金;国家科技重大专项

Synthesis and Characterization of Water-soluble CdTe/ZnTe Core-shell Quantum Dots Capped by Glutathione

XU Xin, KONG Yi-Fei, HE Rong, JI Jia-Jia, CUI Da-Xiang   

  1. (Department of Bio-Nano Science and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, National Key Laboratory of Micro/Nano Fabrication Technology, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240)
  • Received:2010-07-29 Revised:2010-10-18 Published:2010-12-23

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用还原型谷胱甘肽(GSH)作为稳定剂, 合成了水溶性的CdTe/ZnTe核壳结构的半导体量子点. 考察了Zn/Cd反应物配比及GSH用量对CdTe/ZnTe量子点的性能影响. 用高分辨透射电子显微镜(HRTEM)和X射线粉末衍射(XRD)光谱对CdTe和CdTe/ZnTe的形貌和晶体结构进行了表征. 荧光光谱结果表明, 核壳结构的CdTe/ZnTe量子点比单一的CdTe量子点具有更高的荧光量子产率和更好的光活化性能.

关键词: 合成, 谷胱甘肽, 量子点, 核壳

Water-soluble CdTe/ZnTe core-shell quantum dots (QDs) are synthesized using glutathione (GSH) as stabilizer. The effects of molar ratios of Zn/Cd and Zn/GSH on the optical property of QDs are investigated by fluorescence spectroscopy. The morphology and crystal structure of the obtained QDs have been characterized by high-resolution transmission electron microscopy (HRTEM) and power X-ray diffraction (XRD). In comparison with the plain CdTe QDs, both photoluminescence quantum yield (PLQY) and photoactivity of the CdTe/ZnTe core-shell QDs have been greatly improved.

Key words: synthesis, glutathione, quantum dot, core-shell