Gradient-crosslinked hydrogel microdome pattern for multilevel chromatic encryption  

作　　者：Jing Xue Yu Wang Tailong Zhang Kaixuan Li Florian Vogelbacher Yu Zhang Xiaoyu Hou Zixin Zhu Yang Tian Yanlin Song Mingzhu Li 

机构地区：[1]Key Laboratory of Green Printing,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]Key Laboratory of Bionic Materials and Interface Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [3]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China [4]Beijing Key Laboratory for Optical Materials and Photonic Devices,Department of Chemistry,Capital Normal University,Beijing 100048,China

出　　处：《Science China Chemistry》2023年第12期3567-3575,共9页中国科学（化学英文版）

基　　金：supported by the National Key Research and Development Program of China (2022YFE0202000,2018YFA0208500);the National Science Fund for Distinguished Young Scholars (22225502);the National Natural Science Foundation of China (22073107,51573192);NSFC Research Fund for International Young Scientists (22150410331);the External Co-operation Program of Chinese Academy of Sciences (027GJHZ2022044MI)。

摘　　要：In the realm of modern cryptography and anti-counterfeiting,innovative approaches are crucial to encode sensitive information securely.Tailored responsive structural colors have garnered significant interest due to their feature-rich spectra and high sensitivity to external stimuli.However,high costs and complex processing involved in integrating the various delicate microstructures have impeded their widespread development.In this study,we present a straightforward multilevel chromatic encryption scheme utilizing direct-writing gradient-crosslinked microdomes.The solvent-responsive structural color of each microdome,arising from the synergistic effect of total internal reflections and interference,is adjusted independently across the entire visible region.Each microdome functions as a signal recording unit,enabling multilevel color variations through a solventdependent development step.This approach facilitates the encoding of enhanced information into a single pixel.To demonstrate the efficacy of our method for advanced applications,we have prepared a collection of solvent-dependent multilevel codes for algorithm cryptography,showcasing its potential for high-level anti-counterfeiting and high-density optical data storage.

关 键 词：oxygen inhibition structural color direct writing ENCRYPTION storage capacity 

分 类 号：O648.17[理学—物理化学] TP309.7[理学—化学]