Cesium Tungsten Bronze Applied for Transparent Conductive Thin Film

Cesium tungsten bronze, with the formula of CsxWO3, is a very important functional material for preparing transparent conductive thin film as cesium tungsten bronze nano particles possess more excellent visible light transmittance, electronic conductivity and UV/IR shielding ability than tungsten trioxide and even commercial ITO glass materials. Therefore, CsxWO3 also has extremely high-potential applications in smart window materials and biomedical materials.

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According to the experts, they investigated the synthesis, structure, and the multifunctionality, such as conductivity, NIR shielding property and biomedical thermal therapy of the mixed-valence cesium tungsten bronze. And they carried out the environmentally friendly solvothermal process to synthesize the well-crystallized cesium tungsten bronze nano particles with controllable morphologies, particle size and chemical constitution. In a typical synthesis process, the mixture of ethanol and desired amount of acetic acid utilized as a reaction media was introduced in a Teflon-lined autoclave and heated at 200 °C for desired reaction time. The esterification reaction between ethanol and acetic acid led to the formation of a desired amount of water, which acts an import role on the crystalline growth in the solution. By controlling the amount of the acetic acid, it is possible to control the water molecule formation, and consequently, affect the particle size and the morphologies of the products.

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