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X-ray Imaging

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...

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Related Experiment Video

Updated: Sep 2, 2025

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

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Published on: June 23, 2018

Micrometer-Resolution X-ray Imaging Enabled by a Flexible Perovskite Screen.

Ruijia Sun¹, Zhaofen Wang², Hanqiu Wang³

¹Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, Shandong, China.

ACS Applied Materials & Interfaces

|August 5, 2022

Summary

Researchers achieved micrometer spatial resolution using self-assembled perovskite nanosheets for X-ray imaging screens. This flexible screen offers high performance and enables clear visualization of fine structures and biological samples.

Keywords:

X-ray imaging micrometer resolution perovskite nanosheet scintillator self-assembly

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Last Updated: Sep 2, 2025

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Area of Science:

Materials Science
Scintillation Technology
Nanotechnology

Background:

Perovskite scintillators are under development for improved X-ray imaging.
Enhancing spatial resolution in perovskite-based scintillation is a key research goal.
Existing methods face limitations in resolution and substrate compatibility.

Purpose of the Study:

To achieve micrometer spatial resolution in perovskite-based X-ray imaging screens.
To develop flexible and stable perovskite scintillation screens.
To demonstrate the application of these screens in imaging micro- and biological structures.

Main Methods:

Fabrication of X-ray imaging screens using self-assembled perovskite nanosheets.
Utilizing polymer substrates for flexibility and reduced X-ray absorption.
Characterization of energy transfer via transient absorption and photoluminescence lifetime measurements.
Evaluation of spatial resolution using synchrotron-based X-ray imaging.

Main Results:

Achieved micrometer spatial resolution (approximately 2.0 μm).
Demonstrated applicability of nanosheet assembly on various substrates (glass, metal, polymer).
Developed flexible screens with robust bending stability using polymer substrates.
Observed efficient energy transfer between nanosheets.
Reported a large Stokes shift (approximately 316 meV), mitigating reabsorption.
Achieved light yield comparable to LYSO/Ce crystals.
Successfully visualized fine structures of 2D objects (e.g., microchips).
Enabled phase-contrast imaging of biological samples for 3D reconstruction.

Conclusions:

Self-assembled perovskite nanosheet screens offer state-of-the-art spatial resolution for perovskite scintillation.
Flexible perovskite screens provide a promising platform for advanced X-ray imaging applications.
The developed technology overcomes limitations of previous perovskite scintillation materials.