Fe3O4/CdSe/ZnS magnetic fluorescent bifunctional nanocomposites

被引：50
|
作者：
Du, Gui Huan
Liu, Zu Li [1 ]
Lu, Qiang Hua
Xia, Xing
Jia, Li Hui
Yao, Kai Lun
Chu, Qian
Zhang, Su Ming
机构：
[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Tongji Hosp, Wuhan 430070, Peoples R China
来源：
NANOTECHNOLOGY | 2006年 / 17卷 / 12期
关键词：
D O I：
10.1088/0957-4484/17/12/004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Fe3O4/CdSe/ZnS magnetic fluorescent bifunctional nanocomposites were obtained by depositing heterogeneous semiconductor on magnetic nanoparticles. The structure and properties of the Fe3O4/CdSe/ZnS nanocomposites were fully characterized by TEM, XPS, XRD, SQUID and PL. The results indicate that the Fe3O4/CdSe/ZnS nanocomposites are superparamagnetic and are about 8 nm in size. The quantum yield of the nanocomposites increases from 2-3%in Fe3O4/CdSe to 10-15% in Fe3O4/CdSe/ZnS, together with a red shift of both the absorption peak and PL band. The increase of quantum yield is due to the passivation of the surface of magnetic-CdSe nanocomposites with a ZnS layer.
引用
收藏
页码：2850 / 2854
页数：5
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