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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
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Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
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Inkjet-Printed Quantum Dot Fluorescent Security Labels with Triple-Level Optical Encryption.

Xin Zheng1, Yangbin Zhu1, Yang Liu1

  • 1Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350108, People's Republic of China.

ACS Applied Materials & Interfaces
|March 25, 2021
PubMed
Summary
This summary is machine-generated.

This study presents an unclonable anti-counterfeiting system using inkjet-printed quantum dot (QD) ink. The novel security labels offer triple-level authentication, from naked eye to advanced microscopy, ensuring robust product protection.

Keywords:
anti-counterfeitinginkjet printinglabyrinth patternphysical unclonable functionquantum dots

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Optical security labels are crucial for protecting goods and health.
  • Current labels face challenges in balancing low-cost fabrication, easy detection, and high security.
  • Developing advanced anti-counterfeiting solutions remains a significant need.

Purpose of the Study:

  • To design and demonstrate an unclonable anti-counterfeiting system with triple-level security.
  • To utilize inkjet printing for fabricating advanced security labels.
  • To achieve easy and multi-level authentication of security labels.

Main Methods:

  • Inkjet printing of quantum dot (QD) ink droplets onto premodified substrates with glass microspheres.
  • Utilizing capillary action for controlled QD deposition around microspheres, forming microscale patterns.
  • Leveraging droplet evaporation to create nanoscale labyrinthine patterns.

Main Results:

  • Fabrication of security labels with microscale multicircular patterns and nanoscale labyrinthine structures.
  • Demonstration of triple-level authentication: naked eye, portable microscope, and fluorescence microscope.
  • Compatibility with artificial intelligence for rapid identification and verification.

Conclusions:

  • The developed system provides a low-cost, easily detectable, and highly secure anti-counterfeiting solution.
  • The combination of micro- and nanoscale features creates an unclonable security label.
  • The AI-compatible strategy enhances the efficiency of label verification.