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Resolving nanomaterial properties at better than 50nm resolution in raman spectroscopy

Abstract : A 2D hyperspectral Raman map (pixel size 20nm x 20nm) of polymer (PEDOT) nanowires (diameter 100nm) is decomposed into spectral sources and respective abundance maps using bounding hyperplane-based hyperspectral unmixing. The resulting abundance maps are independently deconvolved using an interior point least squares algorithm with a positivity constraint. Spectral changes along and across the wires, as well as differences between wires, can be resolved to better 50nm, a significantly better than the 400nm instrument resolution.
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https://hal.archives-ouvertes.fr/hal-02585957
Contributor : Saïd Moussaoui <>
Submitted on : Friday, May 15, 2020 - 7:42:18 AM
Last modification on : Tuesday, May 19, 2020 - 9:15:24 AM

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  • HAL Id : hal-02585957, version 1

Citation

D. Winterauer, Tim Batten, Saïd Moussaoui, Bernard Humbert, Daniel Funes. Resolving nanomaterial properties at better than 50nm resolution in raman spectroscopy. SIAM Conference on Imaging Science, Jun 2018, Bologne, Italy. ⟨hal-02585957⟩

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