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Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

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Published on: July 12, 2022

A practical solution for eliminating artificial image contrast in aberration-corrected TEM.

Jun Yamasaki¹, Tomoyuki Kawai, Yushi Kondo

¹EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan. p47304a@nucc.cc.nagoya-u.ac.jp

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

|January 5, 2008

Summary

We developed a practical method using image subtraction and deconvolution to accurately reveal atomic structures in transmission electron microscopy (TEM) images. This technique removes artificial contrast, enabling clearer interpretation of materials like gold and silicon.

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Area of Science:

Materials Science
Microscopy
Physics

Background:

Aberration-corrected transmission electron microscopy (TEM) offers high-resolution imaging of atomic structures.
Artificial contrast in TEM images can obscure direct interpretation of atomic arrangements.
Nonlinear components and nonflat phase contrast transfer functions (CTF) are key challenges.

Purpose of the Study:

To present a simple and practical solution for removing artificial contrast in TEM images.
To enable direct and accurate interpretation of atomic arrangements.
To improve the fidelity of atomic structure visualization.

Main Methods:

A combination of "image subtraction" to eliminate nonlinear image components.
Newly improved "image deconvolution" for compensating nonflat phase contrast transfer functions.
Application to experimental and simulation data of gold, silicon, and magnesium oxide.

Main Results:

Demonstrated effective removal of artificial contrast in TEM images.
Achieved clearer visualization of atomic arrangements in various materials.
Simulated potential improvements from future TEM instrumentation.

Conclusions:

The proposed method, combining image subtraction and deconvolution, accurately reveals atomic structures.
This approach facilitates direct interpretation of atomic arrangements in aberration-corrected TEM.
The technique is applicable to current and potentially future TEM instruments.