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Date publication
octobre 2025
Journal
Faraday discussions
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BELMONTE Thierry
Tous les auteurs :
Nominé A, Solomonov AI, Polanšek J, Vergès M, Battie Y, Bruyère S, Ghanbaja J, Pierson JF, Zavašnik J, Feuerbacher M, Cvelbar U, Belmonte T, Milichko V
Lien Pubmed
Résumé
High-entropy alloys (HEAs) combine five or more elements in near-equiatomic ratios, opening an immense compositional space whose optical behaviour is still largely unknown. Phase-modulated ellipsometry on bulk CrMnFeCoNi (Cantor) shows that its intrinsic optical constants, , , and , deviate strongly from the arithmetic means of the constituent elements-by up to a factor of two beyond 1 μm-yet the derived functional responses, reflectance and absorption coefficient , are reproduced to within ∼20%. Cantor nanoparticles have been produced by nanosecond electric discharges in liquid nitrogen. Dark-field spectroscopy and Mie calculations reveal a dominant scattering mode near 100 nm that red-shifts and broadens with increasing size; the steady-state photothermal rise calculated from the absorption cross-section falls between those of the constituent pure metals. Generalising the averaging rule, we compute proxy values of and for 10 994 density-functional-theory-predicted HEAs. Successive optical, thermal and resource filters condense the space to 58 candidates at 355 nm and eight refractory alloys at 1064 nm, illustrating a "sustainable-by-design" route for future HEA photonics.
Référence
Faraday Discuss. 2025 10 30;:
