Synthesis and Characterization of the Water-Soluble ZnSe:Fe/ZnS Core/Shell Quantum Dots

被引：0
|
作者：
Bo, Chunting [1 ]
Huang, Fenghua [1 ]
Chen, Peifeng [1 ]
Guo, Wei [1 ]
机构：
[1] Fujian Normal Univ, Coll Chem & Chem Engn, Fuzhou 350007, Peoples R China
来源：
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON CHEMICAL, MATERIAL AND FOOD ENGINEERING | 2015年 / 22卷
关键词：
ZnSe:Fe/ZnS core/shell quantum dots; L-cysteine; synthesis; water-soluble; fluorescene; SEMICONDUCTOR NANOCRYSTALS; OPTICAL-PROPERTIES; ZNSE;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The synthesis and fluorescence properties of water-soluble ZnSe:Fe/ZnS core/shell quantum dots with L-cysteine as the stabilizer in aqueous solution are reported in this paper. The structure, component and fluorescence properties of quantum dots were characterized by X-ray powder diffraction (XRD),infrared spectrum(IR),UV-Vis absorption spectrum and photoluminescence(PL). XRD studies present that the L-cysteine modified ZnSe:Fe/ZnS core/shell quantum dots have a cubic zinc-blende structure. The photoluminescence emission intensity of the L-cysteine modified ZnSe:Fe/ZnS core/shell quantum dots is enhanced by coating ZnS shell on the surface of core d-dots. The PL intensity of the ZnSe:Fe/ZnS core/shell quantum dots increase at the beginning and decrease with further growth of the ZnS shell, which achieve the maximum when nshell/ncore=0.75:1. After doped with Fe2+ and coated with ZnS shell, the fluorescence quantum yields of the as prepared quantum dots increased from 10.83 % to 18.70%
引用
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页码：318 / 321
页数：4
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