Plasmonic nanopapers: flexible, stable and sensitive multiplex PUF tags for unclonable anti-counterfeiting applications.,Nanoscale

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Plasmonic nanopapers: flexible, stable and sensitive multiplex PUF tags for unclonable anti-counterfeiting applications.
Nanoscale ( IF 5.8 ) Pub Date : 2020-05-07 , DOI: 10.1039/d0nr01223h
Hongrui Cheng ₁ , Yongfeng Lu ₁ , Dongyan Zhu ₁ , Lorenzo Rosa ₂ , Fei Han ₁ , Mingguo Ma ₃ , Wenyue Su ₁ , Paul S Francis ₄ , Yuanhui Zheng ₁

Affiliation

Highly flexible and stable plasmonic nanopaper comprised of silver nanocubes and cellulose nanofibres was fabricated through a self-assembly-assisted vacuum filtration method. It shows significant enhancement of the fluorescence emission with an enhancement factor of 3.6 and Raman scattering with an enhancement factor of ∼104, excellent mechanical properties with tensile strength of 62.9 MPa and Young's modulus of 690.9 ± 40 MPa, and a random distribution of Raman intensity across the whole nanopaper. The plasmonic nanopapers were encoded with multiplexed optical signals including surface plasmon resonance, fluorescence and SERS for anti-counterfeiting applications, thus increasing security levels. The surface plasmon resonance and fluorescence information is used as the first layer of security and can be easily verified by the naked eye, while the unclonable SERS mapping is used as the second layer of security and can be readily authenticated by Raman spectroscopy using a computer vision technique.

中文翻译：

等离子体纳米纸：用于不可克隆的防伪应用的灵活，稳定和敏感的多重PUF标签。

通过自组装辅助真空过滤法制备了由银纳米立方体和纤维素纳米纤维组成的高柔性，稳定的等离子体纳米纸。它显示出显着增强的荧光发射，增强因子为3.6，拉曼散射的增强因子为〜104，优异的机械性能，拉伸强度为62.9 MPa，杨氏模量为690.9±40 MPa，拉曼强度随机分布在整个纳米纸上。等离子体纳米纸用包括表面等离子体共振，荧光和SERS在内的多重光学信号编码，用于防伪应用，从而提高了安全级别。表面等离振子共振和荧光信息被用作第一安全层，并且可以通过肉眼轻松地进行验证，

更新日期：2020-04-03

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