薄膜结构对含多金属氧酸盐多层薄膜电致变色性能的影响。

Effects of film structure on electrochromic properties of the multilayer films containing polyoxometalates.

作者信息

Xu Bingbing, Xu Lin, Gao Guanggang, Guo Weihua, Liu Shuping

机构信息

Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, PR China.

出版信息

J Colloid Interface Sci. 2009 Feb 15;330(2):408-14. doi: 10.1016/j.jcis.2008.10.064. Epub 2008 Oct 30.

DOI:10.1016/j.jcis.2008.10.064

PMID:19013585

Abstract

Multilayer films of tungstophosphate anion (P(2)W(18)) and poly(allylamine hydrochloride) (PAH) were fabricated on quartz and ITO substrates by layer-by-layer self-assembly method. These films were characterized by UV-vis spectroscopy, cyclic voltammetry (CV), chronoamperometric (CA), chronocoulometry (CC) and atomic force microscopy (AFM). The effects of film structure on multilayer electrochromic properties were investigated. The electrochromic responses of the composite films were related to the surface coverage of anion and multilayer thickness. It was found that higher concentration of polycation and anion, or adding salt to the polycation solution used for multilayer film preparation led to thicker and denser film structure which improved optical contrast and coloration efficiency whereas prolonged response time.

摘要

通过层层自组装法在石英和ITO衬底上制备了钨磷酸阴离子（P(2)W(18)）与聚（烯丙胺盐酸盐）（PAH）的多层膜。这些膜通过紫外可见光谱、循环伏安法（CV）、计时电流法（CA）、计时库仑法（CC）和原子力显微镜（AFM）进行表征。研究了膜结构对多层电致变色性能的影响。复合膜的电致变色响应与阴离子的表面覆盖率和多层膜厚度有关。发现较高浓度的聚阳离子和阴离子，或者在用于制备多层膜的聚阳离子溶液中添加盐会导致更厚且更致密的膜结构，这提高了光学对比度和着色效率，但延长了响应时间。