Synthesis and characterization of tungsten oxide nanorods

被引：18

作者：

Guo, DZ

Yu-Zhang, K ^{[1
]}

Gloter, A

Zhang, GM

Xue, ZQ

机构：

[1] Peking Univ, Dept Elect, Beijing 100871, Peoples R China

[2] Univ Reims, Lab Microscopies & Etud Nanostruct, F-51687 Reims 02, France

[3] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France

来源：

JOURNAL OF MATERIALS RESEARCH | 2004年 / 19卷 / 12期

关键词：

D O I：

10.1557/jmr.2004.0469

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystalline nanorods (15-200 nm in diameter and hundreds nanometers in length) have been formed on the carbon-covered W wires by simple electric heating under a vacuum of 5 x 10(-4) Pa. The chemical composition and crystalline structure of the nanorods were carefully investigated by various characterization techniques such as scanning, electron microscopy, transmission electron microscopy, Raman spectroscopy, energy dispersive x-ray spectroscopy and electron energy loss spectroscopy. After ruling out any possible existence of carbon nanotubes (CNTs), tungsten carbide, W-Fe alloying, and formation of other types of tungsten oxides, monoclinic W18O49 phase has been well identified. The mechanism of nanorod formation of sub-tungsten oxide (similar toWO(2.7) compared to WO3) will be discussed in relation to the sample preparation conditions.

引用

页码：3665 / 3670

页数：6

共 38 条

[1] Sheet superconductivity in WO3-x:: crystal structure of the tetragonal matrix [J].