FeAu mixing for high-temperature control of light scattering at the nanometer scale.
Fiche publication
Date publication
janvier 2024
Journal
Nanoscale
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BELMONTE Thierry
Tous les auteurs :
Nominé AV, Gunina EV, Bachinin SV, Solomonov AI, Rybin MV, Shipilovskikh SA, Benrazzouq SE, Ghanbaja J, Gries T, Bruyère S, Nominé A, Belmonte T, Milichko VA
Lien Pubmed
Résumé
Control of the optical properties of a nanoparticle (NP) through its structural changes underlies optical data processing, dynamic coloring, and smart sensing at the nanometer scale. Here, we report on the concept of controlling the light scattering by a NP through mixing of weakly miscible chemical elements (Fe and Au), supporting a thermal-induced phase transformation. The transformation corresponds to the transition from a homogeneous metastable solid solution phase of the (Fe,Au) NP towards an equilibrium biphasic Janus-type NP. We demonstrate that the phase transformation is thermally activated by laser heating up to a threshold of 800 °C (for NPs with a size of hundreds of nm), leading to the associated changes in the light scattering and color of the NP. The results thereby pave the way for the implementation of optical sensors triggered by a high temperature at the nanometer scale NPs based on metal alloys.
Référence
Nanoscale. 2024 01 2;: