A soft photonic bio-adhesive material is designed with real-time colorimetrical monitoring of switchable adhesion by integrating a responsive bio-photonic matrix with mobile hydrogen-binding networking. Synergetic materials sequencing creates a unique iridescent appearance directly coupled with both adhesive ability and shearing strength, in a highly reversible manner. The responsive photonic materials, having a physically hydrogen-bonded chiral nematic organization, vary their adhesion strength due to a transition in cohesive and interfacial failure mechanism in humid surroundings. The bright color appearance shifts from blue to red to transparent and back due to a change in pitch length of the chiral helicoidal organization that also triggers coupled changes in both mechanical strength and interfacial adhesion. Such reversible strength-adhesion-iridescence triple-coupling phenomenon is further explored for design of super-strong switchable bio-adhesives for synthetic/biological surfaces with quick remotely triggered sticky-to-nonsticky transitions, removable conformal soft stickers, and wound dressings with visual monitoring of the healing process, to colorimetric stickers for contaminated respiratory masks.

中文翻译：

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可切换光子生物粘合剂材料

通过将响应式生物光子矩阵与移动氢结合网络相结合，设计了一种软光子生物粘合剂材料，可对可切换粘附进行实时比色监测。协同材料排序以高度可逆的方式创造了一种独特的虹彩外观，直接结合粘合能力和剪切强度。由于潮湿环境中内聚力和界面失效机制的转变，具有物理氢键手性向列组织的响应光子材料会改变其粘附强度。由于手性螺旋组织节距长度的变化，这也引发了机械强度和界面粘附的耦合变化，明亮的颜色外观从蓝色变为红色，然后变为透明并返回。