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相关概念视频

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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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

Updated: Jan 15, 2026

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092
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Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092

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一种用于X射线衍射线形状分析的参考材料.

P Scardi1, M D'Incau1, M A Malagutti1

  • 1Department of Civil, Environmental and Mechanical Engineering University of Trento via Mesiano 77 38123Trento Italy.

Journal of applied crystallography
|October 9, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了低成本的纳米晶体Fe-1.8%Cr钢粉作为粉末衍射的多功能参考材料. 它的精确定义的特性使各种衍射分析方法的可靠测试成为可能.

关键词:
瑞特维尔德方法 瑞特维尔德方法威廉姆森霍尔的方法在X射线中,X射线的衍射效果是不同的.扩散散的散射是一种分散的散射.线形状分析线形状分析配对分布函数的配对分布函数参考材料是参考材料的参考材料.钢铁,钢铁,钢铁,钢铁,钢铁,钢铁,钢铁,钢铁,钢铁.整个粉末图案建模的建模.

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X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects
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X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects

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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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科学领域:

  • 材料科学 材料科学 材料科学
  • 晶体学 晶体学是指结晶学.
  • 纳米技术纳米技术

背景情况:

  • 纳米晶体材料具有独特的特性,但需要精确的表征.
  • 标准化的参考材料对于验证先进的分析技术至关重要.

研究的目的:

  • 开发和描述一个具有成本效益的纳米晶体Fe-1.8%Cr钢粉用于粉末衍射.
  • 评估其作为多种仪器和分析方法的参考材料的适用性.

主要方法:

  • 高能行星研磨以实现控制的纳米晶体域大小.
  • 使用多个粉末衍射仪器 (实验室和同步仪) 进行表征.
  • 应用各种数据分析技术,包括威廉姆森-霍尔,整个粉末模式建模和瑞特维尔德精细化.

主要成果:

  • 均的纳米晶体域大小为10(2) nm,大小分散为5(1) nm.
  • 高位移密度大约为2.90(2) ×10^16 m^-2. 这种高位移密度大约是2.90(2) ×10^16 m^-2.
  • 已证明适用于模拟衍射峰值配置和分析扩散散射.

结论:

  • 开发的Fe-1.8%Cr钢粉是一种稳定,易于处理和具有成本效益的参考材料.
  • 它对于测试和验证各种粉末衍射数据分析方法非常有效.
  • 该材料作为一种有价值的工具,用于推进定量阶段分析和材料表征.