材料科学
弹性体
液晶
镜面反射
热致变色
胆甾液晶
掺杂剂
反射(计算机编程)
光学
可见光谱
相(物质)
复合材料
兴奋剂
光电子学
有机化学
物理
化学
程序设计语言
计算机科学
作者
Michelle T. Brannum,Aubrey M. Steele,Maxwell C. Venetos,LaShanda T. J. Korley,Gary E. Wnek,Timothy J. White
标识
DOI:10.1002/adom.201801683
摘要
Abstract The facile synthesis of well‐aligned, main‐chain liquid crystalline elastomers that retain the cholesteric phase (CLCEs) is reported. The selective reflection inherent to this phase is thermally tuned more than 200 nm in these solid films, across the visible spectrum. The optical response is directly correlated to thermomechanical expansion of the CLCE film thickness. The bandwidth of the selective reflection of the CLCEs is increased to more than 200 nm by the incorporation of photosensitive chiral dopants that introduce heterogeneity in the pitch distribution. The mirror‐like reflection of this CLCE film is also thermochromic, shifting from the visible to infrared. Reminiscent of cephalopods, when combined with the mechanical deformation of voxelated nematic liquid crystal elastomer, the thermochromic response of the CLCE produces solid‐state elements with concurrent variation of specular and diffuse reflectance. These results demonstrate distinctive potential opportunities for liquid crystal elastomers to control light enabling new application in textiles, optics, and architecture.
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