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Multimodal dynamic and unclonable anti-counterfeiting using robust diamond microparticles on heterogeneous substrate.

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Researchers developed advanced anti-counterfeiting labels using diamond microparticles. These secure, unclonable labels offer robust, high-capacity optical encoding for product authentication.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Counterfeit products pose significant global economic and health risks.
  • Advanced anti-counterfeiting materials are crucial for product security.
  • Physical unclonable functions (PUFs) offer a promising defense strategy.

Purpose of the Study:

  • To develop novel, dynamic, and unclonable anti-counterfeiting labels.
  • To leverage diamond microparticles with silicon-vacancy centers for secure authentication.
  • To enable high-capacity optical encoding and time-dependent security features.

Main Methods:

  • Heterogeneous growth of diamond microparticles on silicon substrates via chemical vapor deposition.
  • Utilizing photoluminescence from silicon-vacancy centers and light scattering for optical encoding.
  • Modulating photoluminescence signals through air oxidation for time-dependent encoding.

Main Results:

  • Demonstrated intrinsically unclonable features due to randomized particle characteristics.
  • Achieved high-capacity optical encoding using stable photoluminescence and light scattering signals.
  • Verified ultrahigh stability of the diamond labels under extreme conditions (chemical, thermal, mechanical, UV).

Conclusions:

  • Developed a scalable, low-cost method for fabricating advanced anti-counterfeiting labels.
  • The diamond-based labels offer robust, multimodal, and dynamic security features.
  • The proposed system is immediately applicable for diverse anti-counterfeiting needs.