Cheng Hongrui, Lu Yongfeng, Zhu Dongyan, Rosa Lorenzo, Han Fei, Ma Mingguo, Su Wenyue, Francis Paul S, Zheng Yuanhui
College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, via Vivarelli 10, I-41125, Modena, Italy and Applied Plasmonics Lab, Centre for Micro-Photonics, Mail H74, P.O. Box 218, Hawthorn, VIC 3122, Australia.
Nanoscale. 2020 May 7;12(17):9471-9480. doi: 10.1039/d0nr01223h.
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.
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度灵活且稳定的等离子体纳米纸。它显示出荧光发射显著增强，增强因子为3.6，拉曼散射增强因子约为104，具有优异的机械性能，拉伸强度为62.9 MPa，杨氏模量为690.9±40 MPa，并且拉曼强度在整个纳米纸上随机分布。等离子体纳米纸用包括表面等离子体共振、荧光和表面增强拉曼光谱在内的多路复用光信号进行编码，用于防伪应用，从而提高安全级别。表面等离子体共振和荧光信息用作第一层安全保障，可通过肉眼轻松验证，而不可克隆的表面增强拉曼光谱映射用作第二层安全保障，可使用计算机视觉技术通过拉曼光谱轻松验证。
