Enhanced Ultraviolet Emission from ZnS-Coated ZnO Nanowires Fabricated by Self-Assembling Method
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- 作者：Jinhua Li ; Dongxu Zhao ; Xiuqing Meng ; Zhenzhong Zhang ; Jiying Zhang ; Dezhen Shen ; Youming Lu ; Xiwu Fan
- 刊名：Journal of Physical Chemistry B
- 出版年：2006
- 出版时间：August 3, 2006
- 年：2006
- 卷：110
- 期：30
- 页码：14685 - 14687
- 全文大小：226K
- 年卷期：v.110,no.30(August 3, 2006)
- ISSN：1520-5207
文摘
A simple chemical route for ZnS-coated ZnO nanowires with preferential (002) orientation is reported. Sodiumsulfide and zinc nitrate were employed to supply S and Zn atoms at 60 
C to form ZnS-coated ZnO nanowiresstructures. Electron diffraction measurement shows that the ZnO/ZnS core-shell nanostructure is singlecrystalline. Interesting features are found in the photoluminescence (PL) spectra of ZnS-coated ZnOnanostructures. After coating, the UV emission of nanorods is dramatically enhanced at the expense of thegreen emission. The core/shell structure with higher band gap shell material and reduced surface states shouldbe responsible for this PL enhancement.
C to form ZnS-coated ZnO nanowiresstructures. Electron diffraction measurement shows that the ZnO/ZnS core-shell nanostructure is singlecrystalline. Interesting features are found in the photoluminescence (PL) spectra of ZnS-coated ZnOnanostructures. After coating, the UV emission of nanorods is dramatically enhanced at the expense of thegreen emission. The core/shell structure with higher band gap shell material and reduced surface states shouldbe responsible for this PL enhancement.