The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy
The effect of chromatic aberration (CC) on the spatial resolution in transmission electron microscopy (TEM) was studied in thick specimens in which the sample becomes the limiting factor in the resolution. The sample influences the energy spread of the electron beam, allows only a limited electron d...
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sg-ntu-dr.10356-1655392023-03-29T05:45:36Z The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy Ortega, Eduardo Boothroyd, Chris de Jonge, Niels School of Materials Science and Engineering Facility for Analysis, Characterisation, Testing and Simulation Engineering::Materials Chromatic Aberration Electron Scattering The effect of chromatic aberration (CC) on the spatial resolution in transmission electron microscopy (TEM) was studied in thick specimens in which the sample becomes the limiting factor in the resolution. The sample influences the energy spread of the electron beam, allows only a limited electron dose, and modulates electron scattering events. The experimental set-up consisted of a thin silicon nitride membrane and a silicon wedge containing gold nanoparticles. The resolution was measured as a function of electron dose and sample thickness for different sample configurations and for different microscopy modalities including regular TEM, energy filtered TEM (EFTEM) and CC-corrected TEM. Comparison with an analytical model aided the understanding of the experimental data applied over varied conditions. The general trend for all microscopy modalities was a transition from a noise-limited resolution at low electron dose to a CC-limited resolution at high-dose in the absence of beam blurring. EFTEM required an accurate energy slit offset and an optimal energy spread to energy-slit width ratio to surpass regular TEM. The key advantage of CC correction appeared to be the best possible resolution for larger sample thickness at low electron dose outperforming EFTEM by about fifty percent. Several hypothetical sample configurations relevant to liquid phase electron microscopy were evaluated as well to demonstrate the capabilities of the analytical model and to determine the most optimal microscopy modality for this type of experiment. The analytical model included an automated optimization of the EFTEM settings and may aid in optimizing the sample-limited resolution for experimental analysis and planning. The research was funded by the Deutsche Forschungsgemeinschaft project TFS-STEM 2023-03-29T05:45:36Z 2023-03-29T05:45:36Z 2021 Journal Article Ortega, E., Boothroyd, C. & de Jonge, N. (2021). The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy. Ultramicroscopy, 230, 113383-. https://dx.doi.org/10.1016/j.ultramic.2021.113383 0304-3991 https://hdl.handle.net/10356/165539 10.1016/j.ultramic.2021.113383 34450389 2-s2.0-85113319368 230 113383 en Ultramicroscopy © 2021 Elsevier B.V. All rights reserved. |
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Engineering::Materials Chromatic Aberration Electron Scattering Ortega, Eduardo Boothroyd, Chris de Jonge, Niels The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
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The effect of chromatic aberration (CC) on the spatial resolution in transmission electron microscopy (TEM) was studied in thick specimens in which the sample becomes the limiting factor in the resolution. The sample influences the energy spread of the electron beam, allows only a limited electron dose, and modulates electron scattering events. The experimental set-up consisted of a thin silicon nitride membrane and a silicon wedge containing gold nanoparticles. The resolution was measured as a function of electron dose and sample thickness for different sample configurations and for different microscopy modalities including regular TEM, energy filtered TEM (EFTEM) and CC-corrected TEM. Comparison with an analytical model aided the understanding of the experimental data applied over varied conditions. The general trend for all microscopy modalities was a transition from a noise-limited resolution at low electron dose to a CC-limited resolution at high-dose in the absence of beam blurring. EFTEM required an accurate energy slit offset and an optimal energy spread to energy-slit width ratio to surpass regular TEM. The key advantage of CC correction appeared to be the best possible resolution for larger sample thickness at low electron dose outperforming EFTEM by about fifty percent. Several hypothetical sample configurations relevant to liquid phase electron microscopy were evaluated as well to demonstrate the capabilities of the analytical model and to determine the most optimal microscopy modality for this type of experiment. The analytical model included an automated optimization of the EFTEM settings and may aid in optimizing the sample-limited resolution for experimental analysis and planning. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Ortega, Eduardo Boothroyd, Chris de Jonge, Niels |
format |
Article |
author |
Ortega, Eduardo Boothroyd, Chris de Jonge, Niels |
author_sort |
Ortega, Eduardo |
title |
The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
title_short |
The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
title_full |
The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
title_fullStr |
The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
title_full_unstemmed |
The influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
title_sort |
influence of chromatic aberration on the dose-limited spatial resolution of transmission electron microscopy |
publishDate |
2023 |
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https://hdl.handle.net/10356/165539 |
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1762031114889723904 |