The catalyst-free synthesis of large-area tungsten oxide nanowire arrays on ITO substrate and field emission properties

被引：26

作者：

Huang, Kai ^{[1
]}

Pan, Qingtao ^{[1
]}

Yang, Feng ^{[1
]}

Ni, Shibi ^{[1
]}

He, Deyan ^{[1
]}

机构：

[1] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 04期

基金：

高等学校博士学科点专项科研基金;

关键词：

oxides; vapor deposition; X-ray diffraction; electrical properties;

D O I：

10.1016/j.materresbull.2007.04.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tungsten oxide nanowire arrays have been grown on indium tin oxide coated glass substrate using tungsten trioxide powders as source by thermal evaporation approach without any catalysts. When the O-2/Ar flow rate ratio was 1/100, large-scale, high-density and uniformly distributed tungsten oxide nanowire arrays were obtained. The morphology and structure properties of the tungsten oxide nanowires were characterized by scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. The influences of the oxygen concentration on the growth, density, shape and structure of the nanowires were investigated. The possible growth mechanism which governs the various types of nanowire arrays as the O-2/Ar flow rate ratios changed is also discussed. Field emission properties of tungsten oxide nanowire arrays were studied at a poor vacuum condition. The remarkable performance reveals that the tungsten oxide nanowire arrays can be served as a good candidate for commercial application as electron emitters. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：919 / 925

页数：7

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