Imperial College London
Portrait Picture

Professor David W. McComb

Faculty of Engineering, Department of Materials

Adjunct Professor
 
 
 
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Contact

 

+44 (0)20 7594 6750d.mccomb Website

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2023:10.1016/j.ultramic.2022.113665,
author = {Wang, B and McComb, DW},
doi = {10.1016/j.ultramic.2022.113665},
journal = {Ultramicroscopy},
title = {Phase imaging in scanning transmission electron microscopy using bright-field balanced divergency method.},
url = {http://dx.doi.org/10.1016/j.ultramic.2022.113665},
volume = {245},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We introduce a phase imaging mechanism for scanning transmission electron microscopy that exploits the complementary intensity changes of transmitted disks at different scattering angles. For scanning transmission electron microscopy, this method provides a straightforward, dose-efficient, and noise-robust phase imaging, from atomic resolution to intermediate length scales, as a function of scattering angles and probe defocus. At atomic resolution, we demonstrate that the phase imaging using the method can detect both light and heavy atomic columns. Furthermore, we experimentally apply the method to the imaging of nanoscale magnetic phases in FeGe samples. Compared with conventional methods, phase retrieval using the new method has higher effective spatial resolution and robustness to non-phase background contrast. Our method complements traditional phase imaging modalities in electron microscopy and has the potential to be extended to other scanning transmission techniques and to characterize many emerging material systems.
AU  - Wang,B
AU  - McComb,DW
DO  - 10.1016/j.ultramic.2022.113665
PY  - 2023///
TI  - Phase imaging in scanning transmission electron microscopy using bright-field balanced divergency method.
T2  - Ultramicroscopy
UR  - http://dx.doi.org/10.1016/j.ultramic.2022.113665
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36571903
VL  - 245
ER  -
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