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Updated: Jul 9, 2026
10:25
Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope
Published on: September 14, 2018
Seeing atoms with aberration-corrected sub-Angström electron microscopy
1Materials Science Division, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720-8197, USA. sub-Angstrom@comcast.net
Ultramicroscopy
|December 7, 2007
Summary
High-resolution electron microscopy now achieves sub-Angström resolution, surpassing the "one-Angström barrier" for atomic-level material characterization. Further improvements aim for deep sub-Angström imaging, approaching atomic size limits.
Area of Science:
- Materials Science
- Physics
- Electron Microscopy
Background:
- High-resolution electron microscopy (HREM) enables atomic-level material characterization in simple orientations.
- Complex orientations require enhanced instrumental resolution to resolve projected atomic positions.
Purpose of the Study:
- To detail advancements in electron microscopy resolution.
- To discuss the implications of achieving sub-Angström resolution for materials science.
Main Methods:
- Software and hardware aberration correction in transmission electron microscopes.
- Electron holography techniques.
- Advancements in objective lens aberration correction.
Main Results:
- Sub-Angström resolution has been achieved, surpassing the previous "one-Angström barrier".
- Current aberration correction allows imaging at the sub-0.8Å level, with progress towards 0.5Å.
- Sub-Rayleigh resolution imaging necessitates careful calibration for accurate atom position determination.
Conclusions:
- Electron microscopy resolution has advanced significantly, enabling unprecedented atomic-scale imaging.
- Future resolution limits may be dictated by atomic size rather than instrumental capabilities.
- Optimized imaging conditions can improve the resolution of individual atom peaks.
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