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Aberration correction results in the IBM STEM instrument.
1IBM Research, Yorktown Heights, NY 10598, USA. batson@watson.ibm.com
Ultramicroscopy
|July 23, 2003
Summary
Aberration correction in a scanning transmission electron microscope (STEM) achieved a sub-angstrom probe size of 0.078 nm. Practicality remains limited by stringent stability requirements, despite demonstrated potential.
Area of Science:
- Materials Science
- Electron Microscopy
- Physics
Background:
- Aberration correction is crucial for enhancing resolution in electron microscopy.
- Achieving sub-angstrom probe sizes is a key goal for advanced materials characterization.
Purpose of the Study:
- To report the successful installation and results of aberration correction in a 120 kV STEM.
- To demonstrate the achievement of a sub-angstrom probe size.
Main Methods:
- Installation and operation of aberration correctors in a 120 kV STEM instrument.
- Utilizing post-experiment processing techniques to verify probe size.
Main Results:
- A sub-angstrom probe size of approximately 0.078 nm was achieved.
- The experimental results validate the effectiveness of aberration correction.
Conclusions:
- Aberration correction in STEM has successfully demonstrated the potential for sub-angstrom probe sizes.
- The practical application of this technology is currently limited by demanding stability requirements.