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Electron Microscope Tomography and Single-particle Reconstruction

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...

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Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy

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顺序倾斜的4D-STEM用于改进的动量分辨率的STEM场地图.

Christoph Flathmann^1,2,3, Ulrich Ross¹, Jürgen Belz⁴

¹4th Institute of Physics -Solids and Nanostructures, Georg-August-University Goettingen, Friedrich-Hund-Platz 1, Göttingen 37077, Germany.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

|October 17, 2025

概括

此摘要是机器生成的。

动量解析扫描传输电子显微镜 (MRSTEM) 提供了绘制磁场和电场的新方法. 一种新的顺序光束倾斜方法可以提高数据质量和现场测量精度,而无需改变硬件.

关键词:

在4D-STEM中,动量分辨率扫描传输电子显微镜前置电子衍射的偏移电子衍射.

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Last Updated: Jun 22, 2026

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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
电子显微镜电子显微镜

背景情况:

动量解析扫描传输电子显微镜 (MRSTEM) 对于绘制纳米磁场和电场至关重要,这对设备的功能至关重要.
测量这些场是具有挑战性的,因为与原子场相比,它们的大小很小,使得MRSTEM信号对衍射条件敏感.

研究的目的:

为MRSTEM提出一种替代数据采集方法,以提高现场测量的准确性和数据质量.
展示一种无硬件的方法,允许优化光束倾斜模式和访问额外的衍射信息.

主要方法:

发生电子束的顺序倾斜,在每个倾斜和空间位置记录完整的衍射图案.
从获取的数据生成虚拟大角收束电子衍射模式.
应用先进的数据分析方法,超越简单的平均值,以改进现场测量.

主要成果:

顺序光束倾斜方法提供了访问额外的信息,使虚拟大角收光束电子衍射模式的创建.
这种方法可以对MRSTEM数据质量进行可靠的评估.
提高了纳米尺度横向磁场和电场测量的精度.

结论:

呈现的顺序光束倾斜技术是MRSTEM的一种多功能,独立于硬件的进步.
它增强了数据分析能力和现场测量精度.
数据采集概念广泛适用于其他4D-STEM技术.