Viscoelasticity‐Controlled Relaxation in Wrinkling Surface for Multistage Time‐Resolved Optical Information Encryption

• DOI: 10.1002/adma.202314201
• Publication Date: 2024-03-06T07:14:57Z
• Authors: Dengchong Feng; Qi Guo; Zhenjie Huang; Baiyang Zhou; Li Gong; Shaolin Lu; Yuzhao Yang; Dingshan Yu; Zhikun Zheng; Xudong Chen
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract As counterfeit techniques continue to evolve, ensuring the security of conventional “static” encryption methods becomes increasingly challenging. Here, viscoelasticity‐controlled relaxation is introduced for first time in a bilayer wrinkling system by regulating density hydrogen bond networks polymer construct “dynamic” material. The surface can manipulate light during dynamic process, exhibiting three stages with frosted glass, structural color, and mirror reflection. By viscoelasticity skin layer through UV irradiation, wavelength rate wrinkles be controlled. result, anti‐counterfeiting patterns time‐resolved multistage information are achieved. Crucially, material developed as an label packing boxes daily applications, allowing encrypted activated manually identified naked eyes, surpassing existing materials utilization potential. Besides, extended various interaction networks, demonstrating versatility strategy. This work not only provides additional dimension practical use, but also offers theoretical guidance development advanced optical smart display future.