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Modular Anti-Counterfeit Tags Formed by Template-Assisted Self-Assembly of Plasmonic Nanocrystals and Authenticated

Maha Ibrar1, Sheng-Yuan Huang1, Zachery McCurtain2

  • 1Department of Chemistry, Indiana University, Bloomington, IN 47405, USA.

Advanced Functional Materials
|May 1, 2025
PubMed
Summary

This study introduces a novel anti-counterfeit platform using plasmonic nanoparticles (NPs) to create unique image tags. Template-assisted self-assembly (TASA) enables rapid, reliable authentication of goods, enhancing supply chain security.

Keywords:
artificial intelligencegold nanocrystalsnanorodsplasmonicstemplate-assisted assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Counterfeit goods pose a significant global economic and safety challenge across diverse industries.
  • Existing authentication methods often lack the necessary speed, reliability, or scalability for widespread application.

Purpose of the Study:

  • To develop a novel anti-counterfeit platform utilizing plasmonic nanoparticles for secure product authentication.
  • To demonstrate the fabrication and authentication capabilities of unique image tags created through template-assisted self-assembly.

Main Methods:

  • Plasmonic nanoparticles (NPs) were assembled into periodic arrays of NP clusters using template-assisted self-assembly (TASA).
  • Light scattering responses from the NP arrays were analyzed using dark-field optical microscopy.
  • Authentication was performed using image analysis, comparing shallow and deep neural network approaches.

Main Results:

  • Modular tag design allowed for a variety of unique color responses and images by selecting different NPs and templates.
  • Deep neural networks demonstrated higher accuracy in authenticating TASA-generated tags compared to shallow networks.
  • The platform allows for rapid image analysis and differentiation of tags.

Conclusions:

  • The developed TASA platform offers an efficient and reliable method for creating unique, verifiable anti-counterfeit tags.
  • This technology is well-suited for on-the-fly tagging and supply-chain authentication of critical goods.
  • The combination of ease of fabrication and rapid analysis presents a scalable solution to product counterfeiting.