氯醇盐溶胶-凝胶法纳米结构氧化钨薄膜的光谱学特性

由非离子型Gemini表面活性剂TMDD(HO(EO)xC14(EO)yOH)为结构导向模板, 改进EISA(挥发诱导自组装)镀膜工艺经300 ℃焙烧制得具有连续、均一和光学透明特点的蠕虫介孔纳米晶孔壁氧化钨薄膜. 采用SEM、TEM和Raman光谱对此种薄膜的介孔纳米结构进行了表征, 通过光谱电化学、XPS和椭偏谱等方法, 研究了该薄膜在电解质溶液中的电致变色行为. 结果表明, 所制备的纳米结构氧化钨薄膜在633 nm波长处的循环可逆透过率调制幅度可达75%以上, 并且其电致变色机理具有显著的双注入吸收调制特性.

Spectrum Investigations of Chloro-Alkoxide Sol-Gel Nanostructured Tungsten Oxide Thin Films

Vermicular mesoporous nanostructured WO3 thin films were prepared from a chloro-alkoxide sol-gel method via controlled EISA (evaporate induced self-assembly) process using TMDD (HO(EO)xC14(EO)yOH) surfactant as the structure-directing template. This template was eliminated by calcination of 300 ℃. The as-prepared films could be continuous, uniform, and transparent. SEM, TEM, and Raman spectra were used for the nanostructural examinations. Spectrophotometric, XPS, and ellipsometry methods were also introduced to determine the electrochromic behaviors of the nanostructured films. The results showed that the cyclic reversible transmittance modulation range more than 75% has been realized above wavelength of 633 nm, and the electrochromic mechanism of the nanostructured WO3 films exhibited double-inserted absorbing characteristics.