| 水溶性量子点制备条件的优化及表面修饰 |
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| 引用本文： | 王琼,陈介南,章怀云,Koopman Ben,刘伯斌.水溶性量子点制备条件的优化及表面修饰[J].材料导报,2009,23(10). |
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| 作者姓名： | 王琼 陈介南 章怀云 Koopman Ben 刘伯斌 |
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| 作者单位： | 1. 中南林业科技大学生物环境科学与技术研究所,长沙,410004
2. Particle,Engineering,Research,Center ,University of Florida,Gainesville 32611 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 以L-半胱氨酸为稳定剂在水溶液中合成CdSe纳米粒子,研究了水浴时间、水浴温度、不同L-半胱氨酸/Cd/Se比例、pH值等因素对其荧光光谱的影响,确定了最佳的合成方案.用CdS对其表面进行修饰,采用透射电镜、X射线衍射、光谱法等表征了Cdse/CdS核壳结构颗粒的形成,结果表明该纳米粒子发光强度明显高于单一的CdSe量子点,光谱峰位置有所红移;合成条件会显著影响CASe/CAS核壳结构量子点的荧光性能.
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| 关 键 词： | 量子点 L-半胱氨酸 核壳结构 表面修饰 |
Optimization of Preparation Conditions and Surface Modification of Water-soluble Quantum Dots |
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| WANG Qiong,CHEN Jienan,ZHANG Huaiyun,Koopman Ben,LIU Bobin.Optimization of Preparation Conditions and Surface Modification of Water-soluble Quantum Dots[J].Materials Review,2009,23(10). |
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| Authors: | WANG Qiong CHEN Jienan ZHANG Huaiyun Koopman Ben LIU Bobin |
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| Affiliation: | WANG Qiong1,CHEN Jienan1,ZHANG Huaiyun1,KOOPMAN Ben2,LIU Bobin1(1 Institute of Biological , Environmental Science &Technology,Central South University of Forestry , Technology,Changsha 410004,2 Particle Engineering Research Center,University of Florida,Gainesville 32611) |
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| Abstract: | The water-soluble CdSe nanoparticles are synthesized using L-cysteine as stabilizer.Effects of the reaction temperature,reaction time,molar ratios of L-cysteine/Cd/Se and pH are investigated by fluorescence spectroscopy,and optimal synthesis scheme is established.CdS as a shell is used to modify the surface of CdSe.The resultant CdSe/CdS core/shell nanoparticles are characterized by TEM,XRD and spectroscopy,respectively,and shown to have superior fluorescence properties with red shift of emission and absorp... |
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| Keywords: | quantum dot L-cysteine core-shell structure surface modification |
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