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Anti-counterfeiting patterns encrypted with multi-mode luminescent nanotaggants.

Tianying Sun1, Bingzhe Xu2, Bing Chen1

  • 1Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China. fwang24@cityu.edu.hk.

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Summary

New nanotaggants encrypt anti-counterfeiting patterns with unique light responses. This method offers high-level security through designable covert codes, enhancing product authenticity and preventing fraud.

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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Counterfeiting poses significant economic and safety risks across various industries.
  • Existing anti-counterfeiting measures often lack robust security features and are susceptible to replication.

Purpose of the Study:

  • To develop an advanced anti-counterfeiting system utilizing nanotaggants for enhanced security.
  • To demonstrate a novel decryption method based on optical responses.

Main Methods:

  • Encryption of anti-counterfeiting patterns using nanotaggants with distinct excitation wavelengths.
  • Decryption by analyzing temporal color and graphic responses under varied illumination.
  • Design of covert codes through controlled nanotaggant composition.

Main Results:

  • Successful encryption and decryption of anti-counterfeiting patterns were achieved.
  • The nanotaggant system exhibited selective excitation and distinct optical responses.
  • Designable covert color and graphic codes were demonstrated.

Conclusions:

  • The nanotaggant-based system offers a promising high-level security solution against counterfeiting.
  • The method provides designable and covert security features for product authentication.
  • This technology has the potential to significantly reduce the impact of counterfeit goods.