A Versatile Strategy for Transparent Stimuli-Responsive Interference Coloration
A Versatile Strategy for Transparent Stimuli-Responsive Interference Coloration
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DOI：
10.1021/acsami.8b21290
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发表时间：
2019-02-20
影响因子：
9.5
通讯作者：
Chen, Jian
中科院分区：
文献类型：
--
作者：
Banisadr, Seyedali;Oyefusi, Adebola;Chen, Jian
生物启发的刺激响应结构着色提供了各种各样的潜在应用，从传感到伪装到智能纺织品。由于其设计简单，不需要具有替代折射率或微米和纳米结构的多层材料，薄膜干涉代表了一种有前途的解决方案，可扩展和负担得起的高质量响应结构着色系统的制造。然而，如果将具有适当厚度的聚合物薄膜直接沉积在透明基底（例如玻璃）上，则它们通常不表现出可见的结构色。在这项工作中，一个通用的新策略，使透明的刺激响应干涉显色（RIC）的聚合物-金属-基板系统。其关键概念是使用一种金属氧化物层作为滤光器，而不是高折射率基板或高反射基板。这样的滤光器层允许通过改变金属层厚度来调节透明度、相长干涉反射光和互补相消干涉透射光。实时，连续，比色RIC传感器的湿度，有机蒸汽，和温度证明通过使用不同的刺激响应聚合物。玻璃上的透明RIC膜在膜的相对侧上显示相长干涉反射颜色和互补相消干涉透射颜色的强耦合。这种透明RIC膜允许自我报告的湿度感测窗口的概念验证。
The bioinspired stimuli-responsive structural coloration offers a wide variety of potential applications, ranging from sensing to camouflage to intelligent textiles. Because of its design simplicity, which does not require multilayers of materials with alternative refractive indices or micro- and nanostructures, thin film interference represents a promising solution toward scalable and affordable manufacturing of high-quality responsive structural coloration systems. However, thin films of polymers with appropriate thickness generally do not exhibit visible structural colors if they are directly deposited on transparent substrates such as glass. In this work, a versatile new strategy that enables transparent stimuli-responsive interference coloration (RIC) in the polymer-metal-substrate system is presented. The key concept is to use an ultrathin metal layer as an optical filter instead of high refractive index substrate or highly reflective substrate. Such an optical filter layer allows tuning of the degree of transparency, the constructive interference reflection light, and complementary destructive interference transmission light via changing the metal layer thickness. Real-time, continuous, colorimetric RIC sensors for humidity, organic vapor, and temperature are demonstrated by using different stimuli-responsive polymers. The transparent RIC film on glass shows strong coupling of constructive interference reflected colors and complementary destructive interference transmitted colors on opposite sides of the film. Such transparent RIC film allows for the proof-of-concept demonstration of a self-reporting, humidity-sensing window.