A menu of electron probes for optimising information from scanning transmission electron microscopy.
Ultramicroscopy
; 184(Pt A): 143-155, 2018 01.
Article
em En
| MEDLINE
| ID: mdl-28889084
ABSTRACT
We assess a selection of electron probes in terms of the spatial resolution with which information can be derived about the structure of a specimen, as opposed to the nominal image resolution. Using Ge [001] as a study case, we investigate the scattering dynamics of these probes and determine their relative merits in terms of two qualitative criteria interaction volume and interpretability. This analysis provides a 'menu of probes' from which an optimum probe for tackling a given materials science question can be selected. Hollow cone, vortex and spherical wave fronts are considered, from unit cell to Ångstrom size, and for different defocus and specimen orientations.
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MEDLINE
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En
Ano de publicação:
2018
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Article