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

页码：150 / 153

页数：4

共 18 条

[1] Eutectic reaction of gold thin-films deposited on silicon surface [J].