WO3纳米薄膜的制备与气致变色特性研究

功能材料, 2003, 34(6): 707-710.

WO3纳米薄膜的制备与气致变色特性研究

吴广明 ^1, , 杜开放 ^2, , 陈宁 ^3, , 沈军 ^4, , 周斌 ^5,

1.同济大学,波耳固体物理研究所,上海,200092

2.同济大学,波耳固体物理研究所,上海,200092

3.同济大学,波耳固体物理研究所,上海,200092

4.同济大学,波耳固体物理研究所,上海,200092

5.同济大学,波耳固体物理研究所,上海,200092

基金项目: 国家自然科学基金(69978017)

关键词：溶胶-凝胶技术 , 气致变色 , WO3 , 纳米薄膜

Preparation of nano structured WO3 thin films and gasochromic properties

报道了以钨粉为原料,采用溶胶-凝胶技术和旋转镀膜方法,制备出了气致变色WO3纳米薄膜.采用椭偏仪、X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、红外光谱仪以及可见光分光光度计等方法分析了薄膜的特性.研究结果表明热处理使得薄膜致密,折射率增大,厚度减小,薄膜结晶;过氧键消失,WO3微结构发生了变化,共角W-O-W键吸收越来越强,且向高波数方向移动.这些变化归因于热处理导致的WO3颗粒形状、团聚状态的变化以及应变键的产生.WO3纳米薄膜具有很好的气致变色特性,致色与退色态透射率变化超过60%,变色起因于H扩散到WO3薄膜中形成的小极化子吸收.

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WO3纳米薄膜的制备与气致变色特性研究

Preparation of nano structured WO3 thin films and gasochromic properties

参考文献