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首页> 外文期刊>Applied Surface Science >Nanosized multilayer films with concurrent photochromism and electrochromism based on Dawson-type polyoxometalate
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Nanosized multilayer films with concurrent photochromism and electrochromism based on Dawson-type polyoxometalate

机译：基于道森型多金属氧酸盐的同时发生光致变色和电致变色的纳米多层膜

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摘要

An inorganic-organic composite multilayer film constructed of poly(vinyl alcohol) (PVA) with Dawson-type phosphotungstate anion [P_2W_(18)O_(62)]~(6-) (P_2W_(18)) and poly(allylamine hydrochloride) (PAH) were fabricated on quartz, ITO, silicon and CaF_2 substrates by a layer-by-layer self-assembly method. The film was provided with concurrent photochromism and electrochromism. IR spectra showed that the structure of the PVA was fully maintained in the multilayer film. And their photochromic and electrochromic properties were investigated by UV-vis spectra, cyclic voltammetry (CV), chronoamperometry (CA) measurement and X-ray photoelectron spectra (XPS). Atomic force microscopy (AFM) was used to investigate the surface topography. This study provides a new route to explore the possibility of application to polyoxometalate-based hybrid inorganic-organic materials.
机译：由聚乙烯醇（PVA）与道森型磷钨酸根阴离子[P_2W_（18）O_（62）]〜（6-）（P_2W_（18））和聚烯丙胺盐酸盐构成的无机-有机复合多层膜通过逐层自组装方法，在石英，ITO，硅和CaF_2衬底上制备了PAH（PAH）。该膜同时具有光致变色和电致变色。红外光谱表明，PVA的结构在多层膜中完全保持。并通过紫外可见光谱，循环伏安法（CV），计时电流法（CA）和X射线光电子能谱（XPS）研究了它们的光致变色和电致变色特性。原子力显微镜（AFM）用于研究表面形貌。这项研究提供了一条新的途径，以探索应用于基于多金属氧酸盐的杂化无机有机材料的可能性。

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