Composition-driven transition from amorphous to crystalline films enables bottom-up design of functional surfaces - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Surface Science Année : 2021

Composition-driven transition from amorphous to crystalline films enables bottom-up design of functional surfaces

S. Bruyère
S. Migot
D. Pilloud
David Horwat

Résumé

Composition-driven transition to the crystalline state is characteristic of amorphous metal alloys and is widely observed in thin film. However, the transition zone (compositional range between single-phase amorphous and crystalline films) remains unexplored. Here, we demonstrate that this transition offers an excellent scenario for the fabrication of hybrid crystalline-amorphous architectures. The peculiar morphology of these nano(micro)structured films provides a simple bottom-up route, applicable to a broad range of alloys, for obtaining adjustable multifunctional surfaces. In particular, we prove the feasibility of this approach as a one-step process for a precise control of specular and diffuse reflectance over the visible spectrum. Further, the growth kinetics of the formed two-phase nanostructures is demonstrated equivalent to a 2-dimensional amorphous-to-crystalline phase transformation. Using Zr-W alloys as a model system, fundamental parameters of the growth process and the corresponding metastable thickness-composition phase diagram are extracted. It evidences 2 that the two-phase nanostructures, despite occurring in a wide range of compositions, can be easily hidden experimentally by growth kinetics and nucleation delay. These results open a new avenue on the surface morphology and related functional properties control in thin films.
Fichier principal
Vignette du fichier
Transition from MG to NC films (unmarked).pdf (1 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03278460 , version 1 (05-07-2021)

Identifiants

Citer

A. Borroto, A.C. C García-Wong, S. Bruyère, S. Migot, D. Pilloud, et al.. Composition-driven transition from amorphous to crystalline films enables bottom-up design of functional surfaces. Applied Surface Science, 2021, 538, pp.148133. ⟨10.1016/j.apsusc.2020.148133⟩. ⟨hal-03278460⟩
16 Consultations
32 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More