Large-scale synthesis, microstructure and growth mechanism of self-assembled core-shell ZnO/SiOx nanowires

被引：14
作者：
He, J
Huang, YH
Zhang, Y [1 ]
Gu, YS
Ji, Z
Zhou, C
机构：
[1] Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
来源：
MATERIALS LETTERS | 2006年 / 60卷 / 02期
基金：
中国国家自然科学基金;
关键词：
nanocables; ZnO; SiOx; synthesis; growth mechanism;
D O I：
10.1016/j.matlet.2005.08.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Core-shell structured ZnO/SiO, nanowires were synthesized on gold coated silicon(100) substrate by zinc powder evaporation at 550 degrees C. SEM image showed the nanowires were obtained in large-scale. The diameters and the lengths of the nanowires are about 50 nm and several micrometers respectively. XRD, TEM and EDX investigations confirmed the core-shell structure, i.e. the core zone is single crystalline ZnO and the shell zone is SiO chi amorphous layer and interestingly, the ZnO core was grown along a unique direction of [2 0 (2) over bar 1]. A possible mechanism was also proposed. Firstly, gold film served as catalyst and the nanowires grew out from the surface of Au-Si-Zn liquid alloys; secondly, tin powders were used as inhibitor to keep a low partial pressure of zinc vapor. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：150 / 153
页数：4
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