Esposito, M;
Buchanan, I;
Massimi, L;
Ferrara, JD;
Shearing, PR;
Olivo, A;
Endrizzi, M;
(2023)
Laboratory-based x-ray dark-field microscopy.
Physical Review Applied
, 20
(6)
, Article 064039. 10.1103/PhysRevApplied.20.064039.
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Abstract
We demonstrate the capability of laboratory-based x-ray microscopes, using intensity-modulation masks, to access the submicron length scale in the dark-field contrast channel while maintaining micron resolution in the resolved (refraction and attenuation) channels. The dark-field contrast channel reveals the presence of ensembles of samples' features below the system resolution. Resolved refraction and attenuation channels provide multimodal high-resolution imaging down to the micron scale. We investigate the regimes of modulated and unmodulated dark field as well as refraction, quantifying their dependence on the relationship between feature size in the imaged object and aperture size in the intensity-modulation mask. We propose an analytical model to link the measured signal with the sample's microscopic properties. Finally, we demonstrate the relevance of the microscopic dark-field contrast channel in applications from both the life and physical sciences, providing proof-of-concept results for imaging collagen bundles in cartilage and dendritic growth in lithium batteries.
| Type: | Article |
|---|---|
| Title: | Laboratory-based x-ray dark-field microscopy |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevApplied.20.064039 |
| Publisher version: | https://doi.org/10.1103/PhysRevApplied.20.064039 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10184871 |
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