Egan, CK;
Jacques, SD;
Wilson, MD;
Veale, MC;
Seller, P;
Beale, AM;
Pattrick, RA;
... Cernik, RJ; + view all
(2015)
3D chemical imaging in the laboratory by hyperspectral X-ray computed tomography.
Scientific Reports
, 5
, Article 15979. 10.1038/srep15979.
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Abstract
We report the development of laboratory based hyperspectral X-ray computed tomography which allows the internal elemental chemistry of an object to be reconstructed and visualised in three dimensions. The method employs a spectroscopic X-ray imaging detector with sufficient energy resolution to distinguish individual elemental absorption edges. Elemental distributions can then be made by K-edge subtraction, or alternatively by voxel-wise spectral fitting to give relative atomic concentrations. We demonstrate its application to two material systems: studying the distribution of catalyst material on porous substrates for industrial scale chemical processing; and mapping of minerals and inclusion phases inside a mineralised ore sample. The method makes use of a standard laboratory X-ray source with measurement times similar to that required for conventional computed tomography.
| Type: | Article |
|---|---|
| Title: | 3D chemical imaging in the laboratory by hyperspectral X-ray computed tomography. |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/srep15979 |
| Publisher version: | http://dx.doi.org/10.1038/srep15979 |
| Language: | English |
| Additional information: | © 2016 Macmillan Publishers Limited. All Rights Reserved. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1473184 |
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