Gasochromic effect and relative mechanism of WO3 nanowire films

被引：99

作者：

Chen, Huanjun ^{[1
]}

Xu, Ningsheng ^{[1
]}

Deng, Shaozhi ^{[1
]}

Lu, Dongyu ^{[1
]}

Li, Zhenglin ^{[1
]}

Zhou, Jun ^{[1
]}

Chen, Jun ^{[1
]}

机构：

[1] Sun Yat Sen Zhongshan Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Peoples R China

来源：

NANOTECHNOLOGY | 2007年 / 18卷 / 20期

关键词：

D O I：

10.1088/0957-4484/18/20/205701

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

WO3 nanowire films have been prepared by thermal evaporation on both a silicon substrate and a quartz substrate. The gasochromic effect and the colouration mechanism of the films are investigated in detail by ultraviolet-visible-near infrared ( UV-vis-NIR) spectroscopy, x-ray diffraction ( XRD) spectroscopy, micro-Raman spectroscopy, x-ray photoelectron spectroscopy ( XPS) and electrical transport measurements. The studies reveal that the gasochromism of WO3 nanowire films is caused by hydrogen injection. Along with the injection, a part of the tungsten ions' valences and the lattice structure change, giving rise to the colouration of the films. Moreover, electrical transport measurements show the lower conductance of the coloured film, which further confirms the hydrogen injection mechanism. Finally, a gasochromic model of the WO3 nanowire films is proposed.

引用

页数：6

共 43 条

[1] COLORING OF AMORPHOUS WO3 WITH HYDROGEN PENETRATED THROUGH AN LANI5 THIN-FILM [J].