Epitaxially Constrained Grain Boundary Structures in an Oxide Honeycomb Monolayer - Oxydes en basses dimensions Accéder directement au contenu
Article Dans Une Revue Advanced Materials Interfaces Année : 2022

Epitaxially Constrained Grain Boundary Structures in an Oxide Honeycomb Monolayer

Shuqiu Wang
Xiao Hu
  • Fonction : Auteur
Jacek Goniakowski
Claudine Noguera

Résumé

Grain boundaries (GBs) are ubiquitous in solids. Their description is critical for understanding polycrystalline materials and explaining their mechanical and electrical properties. A GB in a 2D material can be described as a line defect and its atomic structures have been intensively studied in materials such as graphene. These GBs accommodate the relative rotation of two neighboring grains by incorporating periodic units consisting of nonhexagonal rings along the boundary. Zero-degree GBs, called domain boundaries (DBs), where there is only a lattice offset between two grains without any rotation, are rare in 2D van-der-Waals (vdW) bonded materials where the grains can easily move. However, this movement is not possible in 2D materials that have a strong epitaxial relationship with their substrate such as the M2O3 (2 × 2) honeycomb monolayers on noble metal (111) supports. Involving experimental and theoretical investigations, four main DBs are observed here in a monolayer of Ti2O3 supported on Au(111) and their atomic structures are solved. The DB formation energies explain why some DBs are more frequently observed than others. The strong epitaxial constraint from the Au(111) substrate stabilizes some unique Ti2O3 monolayer DB structures that are not observed in vdW-bonded 2D materials.
Fichier principal
Vignette du fichier
manuscript.pdf (2.55 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03797143 , version 1 (21-10-2022)

Identifiants

Citer

Shuqiu Wang, Xiao Hu, Jacek Goniakowski, Claudine Noguera, Martin Castell. Epitaxially Constrained Grain Boundary Structures in an Oxide Honeycomb Monolayer. Advanced Materials Interfaces, 2022, 9 (14), pp.2102213. ⟨10.1002/admi.202102213⟩. ⟨hal-03797143⟩
41 Consultations
12 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More