影像科学与光化学 ›› 2009, Vol. 27 ›› Issue (3): 161-167.DOI: 10.7517/j.issn.1674-0475.2009.03.161

• 研究论文 •    下一篇

表面修饰CdTe量子点的合成及其光学特性

许世超1,3, 姚翠翠1, 张纪梅1, 代昭1, 孙波2, 郑帼1, 韩青1, 胡斐1, 周鸿明1   

  1. 1. 天津工业大学, 材料科学与化学工程学院, 教育部中空纤维膜材料及膜过程重点实验室, 天津, 300160;
    2. 南开大学, 化学学院, 天津, 300071;
    3. 天津工业大学, 生物与纺织材料研究所, 天津, 300160
  • 收稿日期:2008-09-01 修回日期:2008-10-27 出版日期:2009-05-23 发布日期:2009-05-23
  • 通讯作者: 许世超(1975-),男,博士,讲师,主要从事光学纳米材料、生物传感器、环境微生物学等研究工作.
  • 基金资助:
    天津自然科学基金(07JCYBJC15900);国家自然科学基金(20802051).

Preparation and Optical Properties of A Surface Modified CdTe Quantum Dots

XU Shi-chao1,3, YAO Cui-cui1, ZHANG Ji-mei1, DAI Zhao1, SUN Bo2, ZHENG Guo1, HAN Qing1, HU Fei1, ZHOU Hong-ming1   

  1. 1. School of Material Science and Chemical Engineering, Key Laboratory of Hollow Fiber Membrane Materials and Membrane Processes(Ministry of Education), Tianjin Polytechnic University, Tianjin 300160, P.R.China;
    2. School of Chemistry, Nankai University, Tianjin 300071, P.R.China;
    3. Research Institute Biologic and Spinning Materials, Tianjin Polytechnic University, Tianjin 300160, P.R.China
  • Received:2008-09-01 Revised:2008-10-27 Online:2009-05-23 Published:2009-05-23

摘要: 在水相中合成高发光性能的CdTe量子点,研究以巯基乙酸(TGA)为稳定剂对CdTe表面进行修饰,制备在水中分散性良好的纳米晶,通过对CdTe量子点合成反应条件的摸索,掌握了其合成的反应规律.同时用紫外分光光度计、荧光分光光度计和透射电子显微镜对其进行了表征.结果表明,回流时间、n(Cd2+):n(HTe-)、反应物浓度、TGA用量、反应体系pH值,对纳米晶的光学性质具有显著影响.回流2 h制得的CdTe纳米粒子直径约为5 nm,其发射峰窄且对称,表现出良好稳定的光学性质.

关键词: CdTe量子点, 纳米晶, 表面修饰, 合成与表征

Abstract: The well-dispersed CdTe quantum dots(QDs) with high fluorescence were synthesized in aqueous phase via thioglycolic acid(TGA) as stabilizer and surface modifier.The optimum conditions to prepare CdTe QDs were investigated,and the resulting CdTe QDs were characterized with ultra-violet spectrophotometer,fluorescence spectrophotometer,and transmission electronic microscope,respectively.The results indicated that the optical properties of synthesized CdTe QDs were obviously dependent on the conditions of refluxing-time,mol ratio of n(Cd2+):n(HTe-),concentration of reactant,amount of TGA,and the pH value of reaction system.The CdTe QDs with size of 5 nm in diameter were achieved when refluxing-time was 2 h,and which showed ideal optical properties of high photo-stability and narrow width of emission peak.

Key words: CdTe quantum dots, nanocrystals, surface modification, preparation and characterization

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