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| 核壳结构CdS/ZnS荧光量子点的制备与荧光性能研究 | |
| 引用本文： | 蔡晓军,于郭,崔文国,李孝红.核壳结构CdS/ZnS荧光量子点的制备与荧光性能研究[J].功能材料,2009,40(10). |
| 作者姓名： | 蔡晓军 于郭 崔文国 李孝红 |
| 作者单位： | 1. 西南交通大学,生命科学与工程学院,四川,成都,610031 2. 西南交通大学,材料学院,材料先进技术教育部重点实验室,四川,成都,610031 3. 西南交通大学,生命科学与工程学院,四川,成都,610031;西南交通大学,材料学院,材料先进技术教育部重点实验室,四川,成都,610031 |
| 基金项目： | 国家自然科学基金资助项目(30570501); 教育部博士点基金资助项目(20050613025) |
| 摘 要： | 以氧化镉为镉源、硫单质为硫源、油酸为配体、在十八烯体系中合成单分散的CdS纳米颗粒,研究了配体浓度对纳米微粒的生长动力学、颗粒尺寸分布的影响.采用乙基黄原酸锌作为Zn、S源的反应前体,采用逐滴滴加的方法制备了具有核壳结构的CdS/ZnS量子点,吸收光谱和荧光光谱表明CdS/ZnS纳米粒子比单一的CdS纳米粒子具有更优异的发光特性.透射电子显微镜、X射线粉末衍射、X射线光电子能谱、选区电子衍射证明ZnS在CdS表面进行了有效包覆.所制备核壳结构纳米粒子具有较好的尺寸分布,荧光发射峰半高峰宽为18～20nm,荧光量子产率达40%. |
| 关 键 词： | 量子点 有机金属热解法 CdS ZnS |
Preparation and characterization of core/shell structured CdS/ZnS quantum dots |
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| CAI Xiao-jun,YU Guo,CUI Wen-guo,LI Xiao-hong.Preparation and characterization of core/shell structured CdS/ZnS quantum dots[J].Journal of Functional Materials,2009,40(10). | |
| Authors: | CAI Xiao-jun YU Guo CUI Wen-guo LI Xiao-hong |
| Affiliation: | CAI Xiao-jun1,YU Guo2,CUI Wen-guo2,LI Xiao-hong1,2(1.School of Life Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China,2.School of Materials Science and Engineering,Key Laboratory of Advanced Technologies of Materials,Ministry of Education,China) |
| Abstract: | By using cadmium oxide as the Cd precursor,sulfur powder as the S precursor and oleic acid as the capping agent,an organometallic approach has been exploited to synthesize highly monodispersed CdS quantum dots in non-coordinating solvents octadecene.The effects of oleic acid concentration on the growth kinetics,size and size distribution were examined.Zinc ethylxanthate was used as the precursor to obtain highly luminescent CdS/ZnS core/shell nanocrystals.Compared to CdS nanoparticles,a remarkable emission ... |
| Keywords: | quantum dots organometallic approach CdS ZnS |
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