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Is atomic resolution transmission electron microscopy able to resolve and refine amorphous structures?
D Van Dyck1, S Van Aert, A J den Dekker
1Department of Physics, University of Antwerp (RUCA), Groenenborgerlaan 171, 2020 Antwerp, Belgium. dvd@ruca.ua.ac.be
Ultramicroscopy
|November 12, 2003
Summary
Atomic resolution transmission electron microscopy can refine amorphous structures at the atomic level for thin samples. For thicker materials, electron tomography is necessary for atomic-level resolution and refinement.
Area of Science:
- Materials Science
- Microscopy
Background:
- Atomic resolution transmission electron microscopy (ARTEM) faces limitations in resolving amorphous structures.
- Aberration-free microscopes enhance resolution but are constrained by sample thickness.
Purpose of the Study:
- To explore the capabilities and limitations of ARTEM for amorphous structure analysis.
- To identify alternative methods for resolving thicker amorphous materials.
Main Methods:
- Utilizing aberration-free atomic resolution transmission electron microscopy.
- Investigating the impact of foil thickness on structural resolution.
- Applying electron tomography for thicker samples.
Main Results:
- High precision (0.01 Å) is achievable for very thin amorphous foils.
- Extended recording times are necessary, particularly for light atoms.
- Electron tomography is essential for resolving thicker amorphous structures.
Conclusions:
- ARTEM is effective for thin amorphous samples, requiring significant time for light elements.
- Electron tomography provides a viable solution for atomic-level analysis of thicker amorphous materials.