Growth and great UV emission improvement of highly crystalline quality core-shell ZnO/MgO nanowires

被引：19
|
作者：
Wu, Y. [1 ]
Wu, W. [2 ]
Zou, X. M. [1 ]
Xu, L. [1 ]
Li, J. C. [1 ]
机构：
[1] Wuhan Univ, Sch Phys & Technol, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Sch Chem & Mol Sci, Sch Printing & Packaging, Wuhan 430072, Peoples R China
来源：
MATERIALS LETTERS | 2012年 / 84卷
基金：
中国国家自然科学基金;
关键词：
Nanocrystalline materials; Epitaxial growth; Crystal structure; Luminescence; ZNO NANOWIRES; PHOTOLUMINESCENCE;
D O I：
10.1016/j.matlet.2012.06.081
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The highly crystalline core-shell ZnO/MgO nanowires (NWs) were achieved by using a two-step CVD method. The related crystal growth model is proposed. The epitaxial growth of cubic MgO shells on the surfaces of hexagonal ZnO NWs benefits from the close interplanar distances of MgO (111) and ZnO (0002) planes. Comparing with bare ZnO NWs, more than 10 times enhancement of ultraviolet (UV) emission intensity is obtained from ZnO/MgO NWs with a shell thickness of 25 nm, owing to the improvement of crystal quality of ZnO NWs surface layers and the passivation of remained surface defects after forming high crystallization MgO shells. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 150
页数：4
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