Abstract：
Various fascinating optical characteristics in organisms encourage scientists to develop biomimetic synthesis strategies and mimic their unique microstructure. Inspired by the Chameleon\'s skin with tunable color and superior flexibility, this work designs the evaporated-induced self-assembly technique to synthesize the chiral photonic crystal film. Ultrasonic-intensified and additive-assisted techniques synergistically optimize the film properties, on the aspects of optic and mechanic. The film shows considerable rigidity and superior flexibility, which can undergo multiple mechanical deformations. Without destroying the chiral nematic structure, the ultimate strain approaches 50%, which exceeds most cellulose-derived film materials. It also integrates excellent optical performance. The film color can cover the total visible region by tuning the photonic bandgap and has angle-dependent properties. It can make the response to humidity and solvents, and chromaticity variation reflects the degree of stimulation. Importantly, this structural-dependent color change is reversible. Lastly, the photonic crystal materials with excellent mechanics and unique optics have been applied in the security. The anti-counterfeiting material design contains photonic crystal ink, repeatable writing paper, information-hiding film, and color-changing labels, with the features of environmentally friendly, economical, non-destructive, and convenient for authentication.
摘要：
生物体中各种迷人的光学特性鼓励科学家开发仿生合成策略并模仿其独特的微观结构。灵感来自变色龙的皮肤，具有可调的颜色和卓越的灵活性，这项工作设计了蒸发诱导自组装技术来合成手性光子晶体薄膜。超声强化和添加剂辅助技术协同优化薄膜性能，在光学和机械方面。薄膜显示出相当大的刚性和优越的灵活性，可以经历多次机械变形。在不破坏手性向列结构的情况下，极限应变接近50%,超过大多数纤维素衍生的薄膜材料。它还集成了优异的光学性能。薄膜颜色可以通过调整光子带隙来覆盖整个可见区域，并且具有角度依赖性。它可以使对湿度和溶剂的反应，色度变化反映了刺激的程度。重要的是,这种结构依赖的颜色变化是可逆的。最后,光子晶体材料以其优良的力学特性和独特的光学特性被应用于安全领域。防伪材料设计包含光子晶体墨水，可重复的书写纸，信息隐藏胶片，和变色标签，具有环保的特点，经济,非破坏性的，和方便的身份验证。
