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相关概念视频

Hybridization of Atomic Orbitals I03:24

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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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sp3d and sp3d 2 Hybridization
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The method to achieve α-brominated carboxylic acids using a mixture of phosphorus tribromide and bromine is known as the Hell–Volhard–Zelinski reaction. The reaction is catalyzed by phosphorus tribromide, which can be used directly or produced in situ from red phosphorus and bromine. The mechanism comprises PBr3 catalyzed conversion of acid to acid bromide and hydrogen bromide. The acid bromide enolizes to its enol form in the presence of HBr. The nucleophilic enol attacks the...
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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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高性能工业级的 CsPbBrBr 是一个高性能工业级的 CsPbBr.

Qihao Sun1, Bangzhi Ge1, Bao Xiao1

  • 1State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, MIIT, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 7, 2023
PubMed
概括
此摘要是机器生成的。

大型化 (CsPbBr3) 晶体通过优化晶体生长来实现室温马射线检测的高性能. 这一突破使得实用应用的成本效益高,高效的马射线探测器成为可能.

关键词:
在CsPbBr3Br3中.一个单晶的水晶.γ-射线检测检测器

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科学领域:

  • 材料科学 材料科学 材料科学
  • 固态物理 固态物理
  • 核仪器仪表 核仪器仪表 核仪器仪表

背景情况:

  • 全无机金属化物罗夫斯基特CsPbBr3晶体对室温马射线检测具有前景.
  • 现有的大型CsPbBr3晶体的检测效率较低,原因是二次相内含物捕获电荷载体.

研究的目的:

  • 设计CsPbBr3的晶体生长,以克服大晶体性能方面的局限性.
  • 为了获得高质量,大直径的CsPbBr3晶体,适合于实际的马射线检测.

主要方法:

  • 通过控制温度梯度和生长速度,优化了晶体生长过程中的固体-液体接口.
  • 在晶体结构中最小化了二次相的形成.
  • 制造的工业级CsPbBr3晶体,直径为30毫米.

主要成果:

  • 在大型CsPbBr3晶体中实现了35.4cm2V-1s-1的高载体流动性.
  • 证明了卓越的马射线检测性能,在662 keV的137Cs峰值下以9.91%的能量分辨率解决.
  • 获得了迄今为止大型CsPbBr3晶体报告的最高性能指标.

结论:

  • 工程结晶生长成功地抑制了大型CsPbBr3晶体的二次相形成.
  • 开发出的大型CsPbBr3晶体表现出卓越的载体移动性和玛射线检测分辨率.
  • 这一进步为具有成本效益的,可部署的室温马射线探测器铺平了道路.