Article Dans Une Revue Journal of Materials Research and Technology Année : 2025

Effect of purification method on the physico-chemical and optical properties of aqueous carbon dot dispersions analysed using generalised additive models

Résumé

We investigated the impact of purification method (dialysis versus ethanol precipitation) on the physico-chemical, optical, and rheological properties of glucose-derived carbon dots (CD) synthesised by ultrasonic treatment by combining a comprehensive experimental methodology and the utilisation of machine learning tools within the Artificial intelligence (AI) framework. Supervised learning techniques such as nonparametric and semiparametric Generalised additive models (GAM) enabled to extract from optical spectra maximum intensity, wavelength of maximum intensity or full width at half maximum of absorbance or fluorescence revealing nonlinear CD dependence of these key parameters for dialysis and linear one for ethanol. The results demonstrated a more pronounced enhancement of an increase of maximum intensity, redshift and widening of both absorption and fluorescence optical peaks as well as viscosity for dialysed CD in comparison to the use of ethanol, which was associated to an improvement of purity and negative surface charge. Structural and morphological analysis confirmed that dialysed CD exhibit a multi-layered structure with low crystallinity.

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hal-05325724 , version 1 (22-10-2025)

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Enrique Manso, Christian Perruchot, Javier Tarrío-Saavedra, Salvador Naya, Alain Ponton. Effect of purification method on the physico-chemical and optical properties of aqueous carbon dot dispersions analysed using generalised additive models. Journal of Materials Research and Technology, 2025, 39, pp.1627-1637. ⟨10.1016/j.jmrt.2025.09.064⟩. ⟨hal-05325724⟩
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