相关实验视频

Updated: Jun 11, 2025

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

使用实验室的X射线源确定薄膜的对分布函数

Johan Bylin¹, Vassilios Kapaklis¹, Gunnar K Pálsson¹

¹Division of Materials Physics, Department of Physics and Astronomy, Uppsala University, Box 516, 75 121Uppsala, Sweden.

Journal of applied crystallography

|October 10, 2024

概括

对薄无形薄膜 (低至80 nm) 的精确对分布函数可以使用单个X射线衍射扫描来获得. 这种方法最大限度地减少了基板和空气的散射,使纳米级材料的精确结构分析成为可能.

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:

精确的薄形态薄膜的结构特征对于理解它们的特性至关重要.
传统的X射线衍射方法经常与薄膜的弱散射信号和基板的干扰作斗争.

研究的目的:

展示一种可行的方法,以获得薄无形薄膜的准确对分布函数 (PDF).
为了使纳米级结构分析使用随时可用的实验室X射线源.

主要方法:

利用现代化基于实验室的X射线源进行衍射.
采用单一衍射扫描方法,避免单独的基板或空气扫描.
使用带有斜散射几何形状的晶体基板来最大限度地减少布拉格散射.
应用一个有区别的能量过器来减少康普顿散射.
系统的像素选择和3D打印的样本持有器,以最大限度地减少外部散射.
结合一个理论工具来考虑X射线的光学效应和强度比.

主要成果:

精确的对分布函数获得了薄无形薄膜到80nm厚度.
基板布拉格散射通过使用斜散射几何学有效地减少.
使用能量过器,从基板中分散的康普顿散射被显著减少.
通过优化的实验设计,从样本持有器和空气中分散的传播被最小化.

结论:

展示的方法是可行的准确的结构分析薄无形薄膜使用实验室X射线源.
这种技术简化了实验过程,只需要进行一次衍射扫描.
该方法为纳米级材料的表征和研究提供了一个强大的工具.

关键词:

实验室的X射线管道.配对分布函数的配对分布函数薄膜是一种薄膜.

更多相关视频

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$ 10:12

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

Published on: June 19, 2018

Achieving Efficient Fragment Screening at XChem Facility at Diamond Light Source

Achieving Efficient Fragment Screening at XChem Facility at Diamond Light Source

Published on: May 29, 2021

相关概念视频

$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

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...

X-ray Crystallography

X-ray Crystallography

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...