Inkjet Printed Physically‐Unclonable Structural‐Color Anticounterfeiting Labels with Convenient Artificial Intelligence Authentication

  • Yuhuan Li
    Key Laboratory of Inorganic Nanomaterials of Hebei Province College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 P. R. China
  • Zhiwei Liu
    National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China
  • Kuan Zhu
    National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China
  • Liqing Ai
    Department of Biomedical Sciences City University of Hong Kong Kowloon Hong Kong 999077 P. R. China
  • Pan Jia
    Key Laboratory of Inorganic Nanomaterials of Hebei Province College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 P. R. China
  • Na Wu
    Key Laboratory of Inorganic Nanomaterials of Hebei Province College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 P. R. China
  • Haitao Yu
    Key Laboratory of Inorganic Nanomaterials of Hebei Province College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 P. R. China
  • Jinqiao Wang
    National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China
  • Xi Yao
    Department of Biomedical Sciences City University of Hong Kong Kowloon Hong Kong 999077 P. R. China
  • Jinming Zhou
    Key Laboratory of Inorganic Nanomaterials of Hebei Province College of Chemistry and Materials Science Hebei Normal University Shijiazhuang 050024 P. R. China
  • Yanlin Song
    Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

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<jats:title>Abstract</jats:title><jats:p>Inkjet printing is a deterministic process with distinguished advantages of low cost, mass production, and unlimited pattern design capability, but it usually excludes randomness and the corresponding physically unclonable functions (PUFs). Herein, inkjet printing is utilized to fabricate physically unclonable structural‐color anticounterfeiting labels with reliable random photonic structure and convenient artificial intelligence (AI) authentication. The abundant microscale print‐drops with random arrangements, consisting of the cross‐linked short‐range ordered arrays of monodisperse poly(styrene‐methylmethacrylate‐acrylic acid) (P(St‐MMA‐AA)) nanospheres, enabled full‐color hues, and the reliable encoded PUFs, simultaneously. The encoded PUF information with extremely high encoding capacity can be learned and validated with AI, realizing the fast and accurate decoding of the PUFs and thus the unclonable anticounterfeiting applications. Importantly, the coupling of the structural‐color anticounterfeiting labels with perfluorodecyltrimethoxysilane of low surface energy leads to high water resistance, which further improves the structural stability of the labels against water penetration. Based on the package‐compatible inkjet printing approach and the reliable AI authentication, the physically unclonable structural‐color anticounterfeiting labels with high structural stability and reliable AI validation bridges the gap between convenience (in both fabrication and validation) and ultimate security, opening enormous opportunities for their security applications in medicine, documents, currency, or other high‐value products.</jats:p>

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