Wen Xiaoxiang, Lu Xuegang, Li Jianing, Wei Chaoping, Qin Hongji, Liu Yuting, Yang Sen
School of Physics, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
iScience. 2022 Mar 24;25(4):104157. doi: 10.1016/j.isci.2022.104157. eCollection 2022 Apr 15.
In nature, many organisms (e.g., chameleons) protect themselves by changing their colors in response to environmental changes. Inspired by these organisms, we present a multi-responsive, flexible, and structurally colored hydrogel film with a one-dimensional (1D) ordered periodic groove structure. The groove structure endows the film with bright, highly angle-dependent structural colors, which can be reversibly tuned by stretching and releasing. In addition, because of the thermosensitive properties of the hydrogel, the film can be switched between colored state and opaque white state with temperature. In addition, the optical state of the film is sensitive to solvent and can be reversibly changed between colored state and transparent state with soaking and evaporation of the solvent. This reversible, multi-responsive, flexible, and structurally colored hydrogel film has great potential to be used in the fields of color display, sensors, anti-counterfeiting, and so on because of its flexible and diverse tuning methods, excellent optical performance, and convenient preparation process.
在自然界中，许多生物体（如变色龙）通过根据环境变化改变颜色来保护自己。受这些生物体的启发，我们提出了一种具有一维（1D）有序周期性凹槽结构的多响应、柔性且具有结构色的水凝胶薄膜。该凹槽结构赋予薄膜明亮的、高度依赖角度的结构色，可通过拉伸和释放进行可逆调节。此外，由于水凝胶的热敏特性，薄膜可随温度在有色状态和不透明白色状态之间切换。此外，薄膜的光学状态对溶剂敏感，可通过溶剂的浸泡和蒸发在有色状态和透明状态之间可逆变化。这种可逆、多响应、柔性且具有结构色的水凝胶薄膜因其灵活多样的调节方法、优异的光学性能和便捷的制备工艺，在彩色显示、传感器、防伪等领域具有巨大的应用潜力。
