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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...
3.8K

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相关实验视频

Updated: Jun 10, 2025

Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
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Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

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动态X射线连贯衍射分析:弥合成像和光子相关谱之间的时间尺度.

Gerard N Hinsley1, Fabian Westermeier1, Bihan Wang1,2

  • 1Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, Hamburg 22607, Germany.

Nano letters
|October 18, 2024
PubMed
概括
此摘要是机器生成的。

同时使用连贯X射线衍射成像 (CXDI) 和X射线光子相关谱 (XPCS) 允许对纳米粒子布朗运动和聚合进行详细的实地研究. 这种综合方法实现了22 ms的时间分辨率,用于动态材料分析.

关键词:
在X射线光子相关性光谱学和X射线光子相关性光谱学.一致的X射线衍射成像.动力学 动力学 动力学纳米颗粒是一种纳米粒子.

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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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相关实验视频

Last Updated: Jun 10, 2025

Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
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Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

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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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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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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
  • 纳米技术纳米技术

背景情况:

  • 先进的X射线源和探测器使得 *in situ* 和 *operando* 材料研究成为可能.
  • 像CXDI和XPCS这样的连贯X射线衍射技术提供了互补的见解.
  • 由于信号对噪声限制,CXDI和XPCS的同时应用一直具有挑战性.

研究的目的:

  • 展示CXDI和XPCS同时应用的新策略.
  • 为了研究布朗运动和合金纳米颗粒的聚合 *in situ*.
  • 为了在综合的X射线衍射测量中实现高时间分辨率.

主要方法:

  • 使用了同时使用的CXDI和XPCS方法.
  • 在糖醇水混合物中研究了200nm的合金纳米粒子.
  • 为CXDI.DI实现了22毫秒的时间分辨率.

主要成果:

  • 成功可视化了金纳米颗粒的聚合过程.
  • 量化了使用组合技术可以获得的时空动态.
  • 证明了高时间分辨率CXDI的可行性.

结论:

  • 同时使用CXDI和XPCS是*in situ*材料动力学研究的可行策略.
  • 这种结合方法提供了对纳米粒子行为的更好的理解,包括聚合.
  • 展示的22毫秒的时间分辨率为动态*操作*调查开辟了新的途径.