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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Multimodal-Responsive Circularly Polarized Luminescence Security Materials.

Qi Guo1, Mingjiang Zhang1, Zhi Tong1

  • 1Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei230026, China.

Journal of the American Chemical Society
|February 1, 2023
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Summary
This summary is machine-generated.

Researchers developed advanced anticounterfeiting tags using circularly polarized luminescence (CPL) materials. These novel security materials offer multimodal-responsive, unbreakable authentication for combating global counterfeiting.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Counterfeiting poses a significant global economic threat, necessitating advanced authentication methods.
  • Current optical security markers lack complexity and are prone to imitation due to deterministic production.
  • There is a need for sophisticated anticounterfeiting tags with unique optical properties and complex security features.

Purpose of the Study:

  • To develop novel, stable circularly polarized luminescence (CPL) materials for advanced anticounterfeiting applications.
  • To create multimodal-responsive security materials (MRSMs) with enhanced authentication capabilities.
  • To demonstrate a blockchain-like integrated system for secure information encryption and decryption.

Main Methods:

  • Designed helical-coassembly of inorganic quantum dots (QDs) and liquid crystals to create CPL materials.
  • Fabrication of multimodal-responsive security materials (MRSMs) exhibiting six stimuli-responsive modes.
  • Encapsulation of security materials into fibers for application in intelligent textiles.

Main Results:

  • Achieved a figure of merit (FM) of 0.39 for CPL materials, meeting practical anticounterfeiting demands.
  • Developed MRSMs with six distinct stimuli-responsive modes (light, polarization, temperature, voltage, pressure, view angle).
  • Demonstrated a proof-of-principle blockchain-like system for interactive information encryption/decryption.
  • Created intelligent textiles with color-adaptable functions based on environmental changes.

Conclusions:

  • The developed CPL materials and MRSMs offer a promising solution for robust, multimodal anticounterfeiting.
  • The integrated system provides a secure and adaptable platform for information authentication.
  • The application in intelligent textiles opens new avenues for smart materials and security features.