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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Autonomous Signaling and Recording of Electrical and Photodegradation in Polymers.

Chuang Zhang1,2,3,4, Jie Liu1,2,4, Rumeng Yang1,2,3,4

  • 1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao West Road, Fuzhou, Fujian, 350002, P. R. China.

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New fluorescent markers detect and record polymer degradation in devices. These markers provide early warnings through visible color changes, preventing device failure.

Keywords:
autonomous signaling and recordingelectrical and photodegradationfluorescent indicatorhigh sensitivityradicals

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics
  • Spintronics

Background:

  • Dielectric polymers are essential components in optoelectronic and spintronic devices.
  • Electrical stress and light irradiation accelerate polymer degradation, particularly in oxygen, leading to device failure.
  • Early detection and warning of polymer degradation are significant challenges.

Purpose of the Study:

  • To introduce versatile fluorescent markers for autonomous signaling and recording of polymer degradation.
  • To provide a visually discernible warning system for electrical and photodegradation.
  • To offer quantitative insights into polymer electrical properties and improve device reliability.

Main Methods:

  • Development of fluorescent markers embedded within dielectric polymers.
  • Utilizing chemical reactions between fluorophore indicators and degradation-induced oxygen or radicals.
  • Monitoring changes in fluorescence color and intensity as indicators of degradation.

Main Results:

  • Fluorescent markers exhibit pronounced color changes (up to 195 nm redshift) upon degradation.
  • The markers show high sensitivity with a low limit of detection (LOD) in the nmol range.
  • Rapid response (<5 s) to radicals, good memory behavior, and resistance to false positives were observed.

Conclusions:

  • The developed fluorescent markers offer a robust approach for real-time monitoring of polymer degradation.
  • This technology provides early warnings, mitigating the risk of catastrophic device failure.
  • The markers demonstrate superior performance compared to conventional methods, enhancing device longevity and reliability.