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相关概念视频

Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Transmission Electron Microscopy01:15

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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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相关实验视频

Updated: Jun 28, 2025

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments
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使用大角收光束电子 difraktion 的应变可视化.

Fumihiko Uesugi1, Chiaki Tanii2, Naoyuki Sugiyama2

  • 1National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.

Ultramicroscopy
|April 14, 2024
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概括
此摘要是机器生成的。

大角收束电子衍射 (LACBED) 提供了一种高效的应变可视化方法. 与扫描传输电子显微镜-纳米束电子衍射 (STEM-NBD) 相比,这种技术需要更少的数据和计算资源.

关键词:
这是一个有趣的 LACBED.这是NBD的NBD.应变分析 应变分析

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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.
  • 电子显微镜电子显微镜

背景情况:

  • 应变映射对于理解材料变形至关重要.
  • 像STEM-NBD这样的现有方法提供精度,但计算密集.
  • 需要更高效的应变可视化技术.

研究的目的:

  • 通过使用LACBED引入和评估一种新的菌株可视化方法.
  • 为了比较LACBED与STEM-NBD的疗效和资源需求.
  • 为了证明LACBED在捕捉应变诱导的晶体结构变化的能力.

主要方法:

  • 使用大角收束电子衍射 (LACBED) 进行应变可视化.
  • 分析LACBED模式传输磁盘中的缺陷线.
  • 通过调整标本-缺陷线相对位置来获取真实空间图像.
  • 将LACBED的结果与STEM-NBD的菌株图进行比较.

主要成果:

  • 通过观察缺陷线的运动和变化,LACBED有效地可视化了应变.
  • 拟议的LACBED方法比STEM-NBD需要的数据和PC资源要少得多.
  • LACBED可以识别出缺陷线曲线,移动或消失的巨大扭曲.
  • 在LACBED缺陷线行为和NBD结果之间观察到质量一致.

结论:

  • LACBED是一种有效的应变可视化技术,特别是在定量值不至关重要的情况下.
  • 该方法为STEM-NBD提供了一个计算效率高的替代方案,用于广泛的菌株映射.
  • 结合LACBED和NBD可以为材料分析提供全面的菌株信息.