Synthesis, assembly, and electrochromic properties of uniform crystalline WO3 nanorods
Synthesis, assembly, and electrochromic properties of uniform crystalline WO3 nanorods
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DOI：
10.1021/jp804035r
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发表时间：
2008-09-18
影响因子：
3.7
通讯作者：
Ma, Jan
中科院分区：
文献类型：
--
作者：
Wang, Jinmin;Khoo, Eugene;Ma, Jan
我们报道了在没有任何表面活性剂的情况下，均匀结晶的WO_3纳米棒的合成及其组装。在不使用锂离子和硫酸盐的情况下，用简单的水热方法合成了WO_3纳米棒。将合成的WO_3纳米棒悬浮液组装在ITO镀膜玻璃上制备了透明的WO_3纳米棒薄膜。研究发现，纳米棒的组装不受衬底表面性质的影响，而取决于薄膜的干燥速度、悬浮液的浓度和纳米棒的长径比。组装过程遵循聚集-沉积机制。得到的WO_3纳米棒薄膜具有很高的电致变色稳定性和相当的颜色显示、对比度和着色/漂白响应。
We report the synthesis of uniform crystalline WO3 nanorods and their assembly without any surfactants. WO3 nanorods have been synthesized by using a facile hydrothermal process without employing lithium ions and sulfates. Transparent WO3 nanorod film has been prepared by assembled coating of the as-synthesized WO3 nanorods suspension onto ITO coated glass. It is found that the assembly was not affected by the surface properties of substrates, but dependent on the drying rate of the film, the concentration of suspension, and the aspect ratio of nanorods. The assembly process is proposed to follow an aggregation-deposition mechanism. The resulting WO3 nanorod film exhibits high electrochromic stability and comparable color display, contrast, and coloration/bleaching response.