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Non-resonant inelastic X-ray scattering for discrimination of pigments

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  • Non-resonant inelastic X-ray scattering for discrimination of pigments
Author
Lauren Dalecky
Francesco Sottile
Linda Hung
Laure Cazals
Agnès Desolneux
Aurelia Chevalier
Jean-Pascal Rueff
Loic Bertrand
Keywords
paper
Abstract

Inelastic X-ray scattering (IXS) spectroscopy has been used in many fields of solid-state physics and theoretical chemistry as an accurate and quantitative probe of elementary excitations. We show that non-resonant IXS spectra in the energy loss range below 100 eV exhibit a strong contrast across a wide range of commercially available pigments, opening new routes for their discrimination. These signatures combine plasmonic transitions, collective excitations and low energy absorption edges. We have performed IXS to discriminate different artists\textquoteright pigments within complex mixtures and to quantitatively determine rutile and anatase polymorphs of TiO2. The integration of experimental data on pigment powders with suitable ab initio simulations shows a precise fit of the spectroscopic data both in the position of the resonances and in their relative intensity.

Year of Publication
2024
Journal
Phys. Chem. Chem. Phys.
Volume
26
Number of Pages
4363-4371
URL
http://dx.doi.org/10.1039/D3CP04753A
DOI
10.1039/D3CP04753A
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