Fe3O4/CdSe/ZnS magnetic fluorescent bifunctional nanocomposites

被引：51

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.

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页码：2850 / 2854

页数：5

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