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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

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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...
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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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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...
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相关实验视频

Updated: Jun 28, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

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位半环中的X射线衍射在表轴膜中的X射线衍射.

Vladimir M Kaganer1

  • 1Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany.

Journal of applied crystallography
|April 10, 2024
PubMed
概括

蒙特卡洛模拟揭示了如何由异位半循环的X射线衍射模式是由不合适和线程段的比率所塑造的. 这提供了对表皮膜缺陷结构的洞察.

科学领域:

  • 材料科学 材料科学 材料科学
  • 固态物理 固态物理
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 脱位半环,包括不合适和线程段,是表轴膜中的关键缺陷.
  • 了解它们对X射线衍射的影响对于材料的表征至关重要.

研究的目的:

  • 用蒙特卡洛法计算从位移半循环中X射线衍射.
  • 为了研究失位半循环的几何如何影响衍射配置和相互空间地图.

主要方法:

  • 蒙特卡洛模拟被用来建模X射线衍射.
  • 分析的重点是衍射形状和相互空间图.

主要成果:

  • 不合适与线程段长度的比率显著控制了衍射特征.
  • 随着表轴膜厚度的增加,观察到衍射模式的连续转变.
  • 我们比较了边缘型和螺杆型线程臂对衍射的贡献.

结论:

  • 这项研究提供了一种方法,通过X射线衍射来分析表轴膜中的脱位结构.
  • 这些发现将宏观衍射特征与微观缺陷几何联系起来.
关键词:
经轴的电影是指表轴的电影.不适合的移位 不适合的移位 不适合的移位应力放松 应力放松线程排序 排序 排序 排序 排序

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