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In article number 1700828, Dianyun Zhang, Luyi Sun, and co‐workers develop a series of moisture‐responsive wrinkled‐surface devices made using a poly(vinyl alcohol)–poly(dimethylsiloxane) bilayer system. These devices demonstrate reversible, temporary, or permanent wrinkles as moisturized, providing a route to tune the optical properties of a wrinkled surface for various applications, such as encryption...
The wrinkle dynamics (such as reversibility and stability) of human skin are affected by the external stimuli, as well as the skin's structure and mechanical properties. Inspired by these tunable responses, three types of moisture‐responsive wrinkle dynamics are achieved, for the first time, through a single film–substrate system. These dynamics include: (1) completely reversible wrinkles formation;...
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