Synthesis and fluorescence properties of CdSe/CdS nanoparticles in aqueous media

被引：3
|
作者：
Han DongMei [1 ,2 ]
Song ChunFeng [1 ,3 ]
Guo GuangSheng [2 ]
Li XiaoYu [1 ,3 ]
机构：
[1] Beijing Univ Chem Technol, Sch Mat Sci & Engn, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[3] Beijing Univ Chem Technol, Minist Educ, Key Lab Nanomat, Beijing 100029, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2010年 / 53卷 / 05期
基金：
中国国家自然科学基金;
关键词：
CdSe/CdS; alpha-cyclodextrins; aqueous solution synthesis; fluorescence properties; CAPPED CDTE NANOCRYSTALS; QUANTUM DOTS; FABRICATION; GROWTH;
D O I：
10.1007/s11426-010-0173-1
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
On the basis of unique structural characteristics of alpha-cyclodextrin, alpha-cyclodextrin modified CdSe/CdS nanoparticles have been successfully synthesized in aqueous media. Techniques of AFM, TEM, EDS, FTIR, UV-vis absorbance and photoluminescence spectra were used to characterize the morphology, composition and optical characteristics of the synthesized nanoparticles. The results showed that the as-synthesized nanoparticles were elliptical and composed of several small particles. Their average length and diameter were about 20 nm and 15 nm. CdSe/CdS nanoparticles had single well-crystallized hexagonal structure. Packaged with a shell of CdS on the surface, alpha-CD/CdSe-CdS nanoparticles exhibited a red shift in the absorption spectrum, intensity growth in the emission spectrum and a substantial increase in Quantum yields. The size distribution could be adjusted by precursor ratios in the presence of alpha-cyclodextrins.
引用
收藏
页码：1055 / 1059
页数：5
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