被双离子编织的超分子框架驱动的辐射敏感分层混合双矿,用于X射线断层扫描
Xieming Xu1,2, Hao Lu2, Xiong Zhang2
1Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, China.
Angewandte Chemie (International ed. in English)
|November 28, 2024
概括
新的层状混合双矿 (LHDPs) 具有增强的层间电荷传输,提高了X射线检测的灵敏度. 这一突破为开发稳定和灵敏的闪光半导体探测器提供了一种新的战略.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 纳米技术 纳米技术
背景情况:
- 层状混合双矿 (LHDPs) 由于其稳定性,对X射线检测非常有希望.
- 然而,由于层间电荷传输不佳,它们的灵敏度往往受到限制.
研究的目的:
- 为改进X射线检测而改进层间电荷传输的LHDP设计.
- 探索一种使用乙二胺 (EDA) 链的新型层间调制策略.
主要方法:
- 使用EDA合成新的迪昂-雅各布森 (DJ) 阶段LHDPs, (EDABr) 4AgBiBr8和 (EDABr) 4CuBiBr8,使用EDA.
- 结构特征和理论计算以阐明层间相互作用和电荷传输机制.
- 制造和测试类似RP的基于LHDP的X射线探测器设备.
主要成果:
- 实现了以LHDP为基础的X射线探测器5250μC/Gyair cm−2的创纪录的高灵敏度.
- 显示了91 nGyair s-1的低检测极限和出色的抗辐射能力 (50 Gyair).
- 开发了一种用于高性能X射线断层扫描的定向膜装置.
结论:
- 开发出的类似RP的中间层,由超分子框架和键调节,显著增强了电荷传输.
- 这种层间调制策略为创建高度敏感和稳定的X射线检测材料提供了新的途径.
- 这些发现为先进的闪光半导体应用铺平了道路.
相关概念视频
Electron Microscope Tomography and Single-particle Reconstruction
2.4K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.4K
X-ray Imaging
5.4K
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...
5.4K
X-ray Diffraction of Biological Samples
3.8K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
3.8K
Computed Tomography
4.3K
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...
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...
4.3K
X-ray Crystallography
23.8K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
23.8K


