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Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

Published on: March 19, 2021

Optimization of three-dimensional electron diffuse scattering data acquisition.

Romy Poppe¹, Joke Hadermann¹

¹University of Antwerp, Department of Physics, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.

Ultramicroscopy

|August 10, 2024

Summary

This summary is machine-generated.

Quantitative analysis of diffuse scattering in three-dimensional electron diffraction (3D ED) reveals optimal acquisition parameters. This technique offers X-ray diffraction-comparable quality for small crystals, enabling local structure investigation.

Keywords:

3D electron diffraction Single-crystal diffuse scattering

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Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Published on: May 10, 2021

Area of Science:

Materials Science
Crystallography
Electron Microscopy

Background:

Crystalline materials with local order exhibit Bragg reflections and diffuse scattering in diffraction patterns.
Diffuse scattering contains valuable information about local atomic arrangements.

Purpose of the Study:

To quantitatively assess the influence of acquisition parameters on diffuse scattering in 3D ED data.
To establish optimal conditions for acquiring high-quality diffuse scattering data.
To compare the quality of diffuse scattering from 3D ED with X-ray diffraction.

Main Methods:

Investigated the impact of data acquisition mode (e.g., selected area electron diffraction - SAED), detector type (e.g., CCD), and energy filtering on diffuse scattering.
Utilized 3D ED techniques for data collection and analysis.

Main Results:

Diffuse scattering data for quantitative analysis are best acquired in SAED mode using a CCD detector and an energy filter.
3D ED can yield diffuse scattering of quality comparable to single-crystal X-ray diffraction.
Optimized diffuse scattering acquisition enhances the study of local structure.

Conclusions:

Selected area electron diffraction (SAED) with a CCD and energy filter is preferred for quantitative diffuse scattering analysis in 3D ED.
3D ED provides a powerful alternative to X-ray diffraction for local structure determination in small crystals.
This advancement allows the study of materials previously inaccessible to single-crystal X-ray diffraction.