Facile fabrication of mechanochromic-responsive colloidal crystal films
Facile fabrication of mechanochromic-responsive colloidal crystal films
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DOI：
10.1016/j.jcis.2010.09.044
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发表时间：
2011-01-01
影响因子：
9.9
通讯作者：
Chen, Min
中科院分区：
文献类型：
--
作者：
Duan, Lingli;You, Bo;Chen, Min
本文提出了一种基于纳米二氧化硅颗粒的单分散聚合物乳胶室温成膜法制备可逆力致变色晶体薄膜的简单方法。在这种方法中，将软的胶体聚合物球与胶体二氧化硅粒子共混，然后浇铸在基片上，然后在室温下烘干进行自组装，直接得到弹性结晶薄膜。这种晶体薄膜不仅具有可逆和可重复的机械变色响应特性，而且根据聚合物球的大小和应变的不同，其颜色和峰位几乎覆盖整个可见光谱区域。这种光学响应归因于变形过程中晶格间距的变化。(C)2010 Elsevier Inc.保留所有权利。
This paper presents a simple approach to fabricate a reversible mechanochromic-responsive crystal film based on the room-temperature film-formation of monodisperse polymer latex by the aid of nanosilica particles. In this approach, when the "soft" colloidal polymer spheres were blended with colloidal silica particles and then cast on a substrate, followed by drying at room temperature for self-assembly, an elastic crystal film was directly obtained. This crystal film has not only reversible and repeatable mechanochromic-responsive property, but also tunable color and peak position covering almost entire visible spectral region, depending upon the sizes of polymer spheres and strains. This optical response is attributed to the variation of lattice spacing during deformation. (C) 2010 Elsevier Inc. All rights reserved.