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相关概念视频

X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

3.9K
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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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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相关实验视频

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Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
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在现场中子衍射用于分析复杂的粗粒度功能材料.

Manuel Hinterstein1,2, Lucas Lemos da Silva1,2, Michael Knapp2

  • 1Fraunhofer IWM, Freiburg, Germany.

Journal of applied crystallography
|August 9, 2023
PubMed
概括
此摘要是机器生成的。

中子衍射使复杂的功能材料的现场调查成为可能,揭示了酸中电场诱导的相变. 这种方法阐明了与粒度大小和域动态相关的应变机制和应力相互作用.

关键词:
应用电场应用电场.酸泰坦酸是一种酸.同时存在的阶段.复杂的功能材料复杂的功能材料.谷粒大小 谷粒大小 谷粒大小在现场 (in situ) 进行.微观结构就是微观结构.中子 difraktion 中子 difraktion 中子 difraktion 在中子 difraktion 中.应变机制 应变机制

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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

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Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures
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相关实验视频

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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 复杂的功能材料对于能源应用至关重要.
  • 调查它们的结构机制是具有挑战性的,因为共存的阶段和微观结构.
  • 样本体积的同步子限制使对微观结构特征 (如粒径) 的研究变得复杂.

研究的目的:

  • 为了证明中子衍射在复杂的功能材料的现场研究中的实用性.
  • 揭示材料中具有高度相关的共存相的结构机制.
  • 分析关于谷粒大小和频率的酸中电场诱导的相变.

主要方法:

  • 在现场中子衍射实验.
  • 将电场应用于酸样本.
  • 结构阶段转换和应变机制的分析.

主要成果:

  • 中子衍射在in situ条件下成功研究了复杂的功能材料.
  • 细节介绍了酸中电场诱导的相变,根据颗粒大小和频率而有所不同.
  • 发现了应变机制和应力与粒度大小,域壁密度和移动性的相互作用.

结论:

  • 在现场中子衍射是研究复杂的功能材料,特别是具有大粒度的材料的有价值的方法.
  • 这项研究提供了关于酸在电场下的表现的见解.
  • 了解这些机制对于优化能源相关应用中的材料至关重要.