Constructing an anti-counterfeiting material with non-interference dual optical modes is an effective way to improve information security. However, it remains challenging to achieve multistage secure information encryption due to the limited stimulus responsiveness and color tunability of the current dual-mode materials. Herein, a dual-mode hydrogel with both independently tunable structural and fluorescent colors toward multistage information encryption, is reported. In this hydrogel system, the rigid lamellar structure of poly(dodecylglyceryl itaconate) (pDGI) formed by shear flow-induced self-assembly provides the restricted domains wherein monomers undergo polymerization to form a hydrogel network, producing structural color. The introduction of fluorescent monomer 6-acrylamidopicolinate (6APA) as a complexation site provides the possibility of fluorescent color formation. The hydrogel's angle-dependent structural color can be controlled by adjusting the crosslinking density and water content. Additionally, the fluorescence color can be modulated by adjusting the ratio of lanthanide ions. Information of dual-mode can be displayed separately in different channels and synergistically overlayed to read the ultimate message. Thus, a multistage information encryption system based on this hydrogel is devised through the programed decryption process. This strategy holds tremendous potential as a platform for encrypting and safeguarding valuable and authentic information in the field of anti-counterfeiting.

中文翻译：

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具有结构和荧光颜色的双模式水凝胶可实现多级安全信息加密


构建互不干扰的双光模防伪材料是提高信息安全性的有效途径。然而，由于当前双模材料的刺激响应能力和颜色可调性有限，实现多级安全信息加密仍然具有挑战性。本文报道了一种双模式水凝胶，具有独立可调的结构和荧光颜色，可实现多级信息加密。在该水凝胶系统中，通过剪切流诱导的自组装形成的聚（衣康酸十二烷基甘油酯）（pDGI）的刚性层状结构提供了限制域，其中单体进行聚合形成水凝胶网络，产生结构颜色。荧光单体6-丙烯酰氨基吡啶甲酸(6APA)作为络合位点的引入提供了荧光颜色形成的可能性。水凝胶的角度依赖性结构颜色可以通过调节交联密度和水含量来控制。此外，可以通过调节镧系离子的比例来调节荧光颜色。双模信息可在不同通道单独显示，并协同叠加读取最终信息。因此，通过编程解密过程设计了基于该水凝胶的多级信息加密系统。该策略作为加密和保护防伪领域有价值且真实的信息的平台具有巨大的潜力。