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High-Performance X-Ray Imaging using Lanthanide Metal-Organic Frameworks.

Xintong Zhang1, Haiyi Qiu1, Wang Luo1

  • 1Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Material, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, 510006, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 23, 2023
PubMed
Summary
This summary is machine-generated.

Flexible X-ray detectors were developed using solution-processable lanthanide-based metal-organic frameworks. These microscintillators offer high-resolution imaging and a low detection limit, advancing radiation detection technology.

Keywords:
metal-organic frameworkradiographyradioluminescencescintillatorstriplet energy transfer

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Area of Science:

  • Materials Science
  • Nanotechnology
  • Radiological Physics

Background:

  • Organic scintillators have low radioluminescence.
  • Inorganic scintillators are too bulky for flexible detectors.
  • Advanced materials are needed for next-generation radiation detection.

Purpose of the Study:

  • To demonstrate high-resolution X-ray imaging using lanthanide-based metal-organic frameworks (MOFs) as microscale scintillators.
  • To develop flexible X-ray detectors with enhanced sensitivity and resolution.
  • To explore MOFs for optoelectronics and X-ray sensing applications.

Main Methods:

  • Fabrication of solution-processable lanthanide-based MOFs.
  • Characterization of MOF radioluminescence and energy transfer mechanisms.
  • Integration of MOFs into flexible polymer matrices for detector development.
  • Evaluation of detector performance, including detection limit and imaging resolution.

Main Results:

  • Demonstrated high-resolution X-ray imaging with MOF-based microscale scintillators.
  • Achieved a detection limit of 23 nGy/s, significantly lower than medical diagnostic doses.
  • Developed flexible X-ray detectors with imaging resolution exceeding 16.6 line pairs/mm.
  • Showcased color-tunable radioluminescence by controlling Tb³⁺ and Eu³⁺ ion ratios.

Conclusions:

  • Lanthanide-based MOFs are promising for developing efficient, flexible X-ray detectors.
  • The crystalline nature of MOFs facilitates charge carrier trapping and energy transfer for enhanced scintillation.
  • These findings pave the way for novel hybrid scintillators in optoelectronics and advanced imaging.