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Dual-imaging-mode smart hydrogel information platform for illumination-independent covert decryption and read

International Journal of Smart and Nano Materials 2022年第4期13卷 612-625页

作者： Junjie Wei Long Li Rui Li Qingquan Liu Zejun Yan Tao Chen Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboChina School of Chemical Sciences University of Chinese Academy of SciencesBeijingChina Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion Hunan University of Science and TechnologyXiangtanChina Department of Urology&Nephrology Ningbo First Hospitalthe Affiliated Hospital of Zhejiang UniversityNingboChina

Smart hydrogel with color responsiveness is envisioned as one of the most promising materials for advanced information encryption and decryption platform,but the illumination-dependent way of decrypt-ing and reading information leads to the worrying of concealment in some particular ***,we proposed a smart hydrogel information platform with dual imaging modes by utilizing the accom-panying behaviors in transparency change and heat releasing after crystallization of supercooled *** this smart hydrogel informa-tion platform,the hidden information could be written and decrypted by ink of ethylene glycol and decryption tool of seed crystal,***,in addition to the traditional optical imaging mode with the assistance of light illumination,the decrypted information on dual-imaging-mode hydrogel platform also could be read by thermal imaging mode in dark environment owing to the exothermic *** illumination-independent read mode based on heat radia-tion helps to improve the secrecy and safety of the decryption and read *** investigation provides a facile and feasible strategy to design illumination-independent information platform that enables reading the encrypted information in secret.

关键词： Hydrogel information platform information decryption thermal imaging illumination-independent pattern crystallization

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Ionoprinting controlled information storage of fluorescent hydrogel for hierarchical and multi-dimensional decryption

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Science China Materials 2019年第6期62卷 831-839页

作者： Xiao-Xia Le Wei Lu Jiang He Michael J. Serpe Jia-Wei Zhang Tao Chen Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Material Technology and EngineeringChinese Academy of Sciences University of Chinese Academy of Sciences Department of Chemistry University of Alberta

information storage and corresponding encryption/decryption are highly important owing to the prevalence of counterfeit activities and information leakage in the current age. Herein, we propose a novel method to store information via controllable ionoprinting onto fluorescent hydrogel for hierarchical and multi-dimensional *** incorporating pyrene moieties and carboxylic groups into polymeric hydrogel network, fluorescence changing and controllable shape deformation behaviors could be achieved and integrated by ionoprinting of Fe3+ions. The diffusion of Fe^3+ions into fluorescent hydrogel can quench the fluorescence of pyrene moieties, and chelate with carboxylic groups to generate anisotropic structures for shape deformation simultaneously. Thus, fluorescence quenching-based 2D information and actuation-based 3D information could be hierarchically decrypted when exposed to UV light and being put into water, respectively. Importantly, the stored information could be erased by replacing Fe^3+with H^+, which allows the fluorescent hydrogel as a recyclable information storage material. This work may provide new insights in designing and fabricating novel soft devices for hierarchical and multidimensional information encryption, against the rising problems of counterfeiting and confidential information disclosure.

关键词： information storage information decryption hydrogel actuator fluorescence quenching anisotropic structures

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