研究目的
To develop a highly flexible and stable plasmonic nanopaper for unclonable anti-counterfeiting applications by encoding multiplexed optical signals including surface plasmon resonance, fluorescence, and SERS.
研究成果
The developed plasmonic nanopaper shows significant enhancements in fluorescence and Raman scattering, excellent mechanical properties, and a random distribution of Raman intensity, making it suitable for high-security anti-counterfeiting applications. The multiplexed optical signals provide two layers of security, easily verifiable by the naked eye and Raman spectroscopy, respectively.
研究不足
The study focuses on the fabrication and initial testing of plasmonic nanopapers for anti-counterfeiting applications. Further research is needed to explore scalability, long-term stability under various environmental conditions, and integration into existing security systems.
1：Experimental Design and Method Selection:
The plasmonic nanopaper was fabricated through a self-assembly-assisted vacuum filtration method using silver nanocubes (AgNCs) and cellulose nanofibres (CNFs) as building blocks.
2：Sample Selection and Data Sources:
AgNCs were synthesized chemically, and CNFs were derived from garlic husk.
3：List of Experimental Equipment and Materials:
Transmission electron microscope (TEM, Tecnai Model G2 F20 S-TWIN), high-resolution field emission scanning electron microscope (SEM, Verios G4), X-ray photoelectron spectroscopy (XPS, VG ESCALAB 250), UV-vis spectrophotometer (Varian Cary 500), fluorophotometer (Edinburgh FL/FS900), and inVia Reflex Raman Microscope (Renishaw OPTIMA 8000).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The AgNCs and CNFs were mixed and subjected to vacuum filtration to form the nanopaper. The nanopaper was then encoded with benzenethiol for Raman signals and fluorescein for fluorescence patterns.
5：Data Analysis Methods:
The optical properties were analyzed using UV-vis and fluorescence spectroscopy, and the mechanical properties were tested for tensile strength and Young’s modulus.
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