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表面修饰CdTe量子点的合成及其光学特性
引用本文:许世超,姚翠翠,张纪梅,代昭,孙波,郑帼,韩青,胡斐,周鸿明.表面修饰CdTe量子点的合成及其光学特性[J].影像科学与光化学,2009,27(3):161-167.
作者姓名:许世超  姚翠翠  张纪梅  代昭  孙波  郑帼  韩青  胡斐  周鸿明
作者单位: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;天津工业大学,生物与纺织材料研究所,天津300160
2. 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
3. 南开大学,化学学院,天津,300071
基金项目:天津市自然科学基金,国家自然科学基金 
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

Preparation and Optical Properties of A Surface Modified CdTe Quantum Dots
XU Shi-chao,YAO Cui-cui,ZHANG Ji-mei,DAI Zhao,SUN Bo,ZHENG Guo,HAN Qing,HU Fei,ZHOU Hong-ming.Preparation and Optical Properties of A Surface Modified CdTe Quantum Dots[J].Imaging Science and Photochemistry,2009,27(3):161-167.
Authors:XU Shi-chao  YAO Cui-cui  ZHANG Ji-mei  DAI Zhao  SUN Bo  ZHENG Guo  HAN Qing  HU Fei  ZHOU Hong-ming
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.
Keywords:CdTe quantum dots  nanocrystals  surface modification  preparation and characterization
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