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Flexible and Biocompatible Physical Unclonable Function Anti‐Counterfeiting Label
Author(s) -
Hu YanWei,
Zhang TaiPing,
Wang ChunFeng,
Liu KaiKai,
Sun Yuan,
Li Lei,
Lv ChaoFan,
Liang YaChuan,
Jiao FuHang,
Zhao WenBo,
Dong Lin,
Shan ChongXin
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202102108
Subject(s) - fibroin , biocompatible material , materials science , biocompatibility , nanotechnology , physical unclonable function , limiting , substrate (aquarium) , silk , computer science , biomedical engineering , composite material , computer hardware , engineering , mechanical engineering , oceanography , geology , metallurgy , arbiter
Optical physical unclonable functions (PUFs) have been proven to be one of the most effective anti‐counterfeiting strategies. However, optical PUFs endowed with flexibility and biocompatibility have not been developed, limiting their application scenarios. Herein, biocompatible and flexible optical PUF labels are developed by randomly embedding microdiamonds in silk fibroin films. The PUF labels can be conformally attached onto the surface of complex shaped objects, providing the desired protection against fake and interior products. In this system, silk fibroin films serve as a flexible and biocompatible substrate, while the Raman signal of the microdiamonds serves as response of the excitation. The extremely high stability and random distribution of the microdiamonds ensure the performance of PUFs, and the maximum encoding capability of 2 10000 is finally realized. The cytotoxicity analysis results also verify the biosafety of the PUF system. In addition, the as‐prepared PUF labels are attached onto the surface of polyethylene material, and human skin, and even have been implanted under chicken skin tissue, promising their practical applications.