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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Determination of Crystal Structures01:29

Determination of Crystal Structures

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...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
X-ray Imaging01:24

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 X-rays, and by 1900, X-ray was widely...

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Related Experiment Video

Updated: Jun 28, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
06:28

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

Deciphering Core Geometry for the Rational Design of Copper(I) Iodide Cluster Scintillators Toward Computed

Pengyu Zhang1, Zhuoer Cai2, Haowei Wang1

  • 1College of Materials Science and Engineering, College of Physics and Optoelectronics Engineering, Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing, P. R. China.

Angewandte Chemie (International Ed. in English)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

We introduce "coordination-saturation isomerism" to tune copper-iodide scintillators. This molecular design strategy optimizes luminescence and stability for advanced radiation detection and medical imaging applications.

Keywords:
CT imagingall‐in‐onecoordination‐saturation isomerismcopper‐iodide clustersscintillation

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Synthesis of In37P20(O2CR)51 Clusters and Their Conversion to InP Quantum Dots

Published on: May 7, 2019

Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Scintillators are vital for radiation detection and medical imaging but face challenges in optimizing luminescence, stability, and device compatibility through molecular design.
  • Current molecular design strategies often struggle to achieve simultaneous improvements in these critical properties.

Purpose of the Study:

  • To introduce and demonstrate a novel molecular design paradigm, "coordination-saturation isomerism," for systematically tuning the luminescence and scintillation properties of copper-iodide clusters.
  • To explore how modulating the protonation state of an A-site cation influences the structural modes and optical properties of copper-iodide clusters.

Main Methods:

  • Systematic structural and optical characterization of copper-iodide clusters synthesized via coordination-saturation isomerism.
  • Modulation of the protonation state of N-methylpiperazine to achieve distinct structural modes (1D chain, 0D cluster).
  • Evaluation of luminescence efficiency (photoluminescence quantum yield) and scintillation performance (light yield).

Main Results:

  • Three distinct structural modes were achieved: an ionic 1D chain with excitation-dependent dual emission, a rigid 0D coordination-type cluster (Cu4I4L4) with high photoluminescence quantum yield (86%) and light yield (53,000 ph·MeV-1), and a hybrid-type 0D cluster with red-shifted emission.
  • The coordination-type Cu4I4L4 cluster demonstrated outstanding scintillation performance.
  • A flexible scintillation film based on Cu4I4L4 enabled high-resolution CT imaging.

Conclusions:

  • Coordination-saturation isomerism offers a powerful molecular blueprint for precise design and performance regulation of metal-halide optoelectronic materials.
  • Structural evolution from ionic to covalent bonding and saturation dictates excited-state properties and device performance.
  • This material system shows significant potential for flexible X-ray detection and imaging applications, including medical imaging.