Imaging columns of the light elements carbon, nitrogen and oxygen with sub Angstrom resolution
| Autor: | Michael A. O'Keefe, Andreas Thust, C. J. D. Hetherington, R. Kilaas, Yang Wang, Christian Kisielowski |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Microscope business.industry Image processing Iterative reconstruction Electron Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Field emission microscopy Field electron emission Spherical aberration Optics law business Instrumentation Image resolution |
| Popis: | It is reported that lattice imaging with a 300 kV field emission microscope in combination with numerical reconstruction procedures can be used to reach an interpretable resolution of about 80 pm for the first time. A retrieval of the electron exit wave from focal series allows for the resolution of single atomic columns of the light elements carbon, nitrogen, and oxygen at a projected nearest neighbor spacing down to 85 pm. Lens aberrations are corrected on-line during the experiment and by hardware such that resulting image distortions are below 80 pm. Consequently, the imaging can be aberration-free to this extent. The resolution enhancement results from increased electrical and mechanical stability's of the instrument coupled with a low spherical aberration coefficient of 0.595 + 0.005 mm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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