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Towards the Automated Extraction of Structural Information from X-ray Absorption Spectra

Lookup NU author(s): Dr Tudur David, Kathryn Garside, Professor Thomas Penfold

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

X-ray absorption near-edge structure (XANES) spectroscopy is widely used across the natural sciences to obtain element specific atomic scale insight into the structure of matter. However, despite its increasing use owing to the proliferation of high-brilliance third- and fourth-generation light sources such as synchrotrons and X-ray free-electron lasers, decoding the wealth of information encoded within each spectra can sometimes be challenging and often requires detailed calculations. In this Article we introduce a supervised machine learning method which aims at directly extracting structural information from a XANES spectrum. Using a convolutional neural network, trained using theoretical data, our approach performs this direct translations of spectral information and achieves a median error in first coordination shell bond-lengths of 0.1 Å, when applied to experimental spectra. By combining this with the bootstrap resampling approach, our network is also able to quantify the uncertainty expected, providing non-experts with a metric for the reliability of each prediction. This work sets the foundation for future work in delivering techniques that can accurately quantify structural information directly from XANES spectra.


Publication metadata

Author(s): David T, Aznan N, Garside K, Penfold TJ

Publication type: Article

Publication status: Published

Journal: Digital Discovery

Year: 2023

Volume: 2

Issue: 5

Pages: 1461-1470

Online publication date: 29/08/2023

Acceptance date: 29/08/2023

Date deposited: 29/08/2023

ISSN (electronic): 2635-098X

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/D3DD00101F

DOI: 10.1039/D3DD00101F


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Funding

Funder referenceFunder name
EPSRC
EP/W008009/1
EP/X035514/1
Leverhulme Trust
RPG-2020-268

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