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相关概念视频

X-ray Diffraction of Biological Samples01:10

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...
3.8K
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...
23.9K

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相关实验视频

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On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
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开放式X射线衍光仪用于结晶学,压缩,收缩和具有可变温度功能的结构相位过渡.

Khan Alam1,2

  • 1IRC for Sustainable Energy Systems, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.

MethodsX
|April 25, 2024
PubMed
概括

研究人员开发了一种新的可变温度X射线衍射仪,用于开放式加热和冷却研究. 这种新设置有效地分析了材料结构相变,比如化薄膜中的相变.

关键词:
生物工程是生物工程.生物样本 生物样本分子光束的表达力 (epitaxy).开放式X射线衍光仪具有可变温度能力.阶段变化材料的变相材料.结构性阶段过渡结构性阶段过渡在可变温度的X射线衍射射线上.

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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相关实验视频

Last Updated: Jun 27, 2025

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
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On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Synthesis and Microdiffraction at Extreme Pressures and Temperatures

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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.
  • 物理化学 物理化学

背景情况:

  • 材料由于温度变化而表现出热膨胀/收缩,影响原子距离.
  • 在材料晶体结构分析中,X射线衍射 (XRD) 是至关重要的.
  • 对于可变温度研究的传统XRD设置通常是昂贵的,需要真空或专门的控制器.

研究的目的:

  • 引入一个具有成本效益的,可变温度的X射线衍光仪设计.
  • 在户外采样加热和冷却过程中实现XRD数据采集.
  • 为了研究在变化温度下材料的结构相变.

主要方法:

  • 设计和制造一种新的可变温度X射线衍射仪.
  • 双模式运行:在户外环境中加热和冷却.
  • 微光度计用于研究化 (CrN) 薄膜的应用.

主要成果:

  • 拟议的衍射仪在露天加热和冷却模式下成功获取了XRD数据.
  • 该研究证明了新设置用于可变温度分析的有效性.
  • 成功地研究了化薄膜中的结构相位过渡.

结论:

  • 开发的可变温度X射线衍光仪是有效和多功能.
  • 这种设置有助于更好地理解在不同温度下复杂的材料行为.
  • 这种设计为可变温度XRD研究提供了更容易获得的方法.