Resolving few-layer antimonene/graphene heterostructures

Author(s)
Tushar Gupta, Kenan Elibol, Stefan Hummel, Michael Stöger-Pollach, Clemens Mangler, Gerlinde Habler, Jannik C. Meyer, Dominik Eder, Bernhard C. Bayer
Abstract

Two-dimensional (2D) antimony (Sb, "antimonene") is of interest in electronics and batteries. Sb however exhibits a large allotropic structural diversity, which is also influenced by its support. Thus, Sb heterostructure formation is key in 2D Sb integration. Particularly, 2D Sb/graphene interfaces are important. We thus study here few-layered 2D Sb/graphene heterostructures with atomic resolution (scanning) transmission electron microscopy. We find two Sb morphologies to coexist: first, a 2D morphology of layered beta-Sb with beta-Sb(001)parallel to graphene(001) texture. Second, one-dimensional Sb nanowires which can be matched to beta-Sb[2-21]perpendicular to graphene(001) and are closely related to cubic Sb(001)parallel to graphene(001). Importantly, both Sb morphologies show rotational van-der-Waals epitaxy with graphene. Both are resilient against oxidation, although superficial Sb-oxide formation merits consideration, including epitaxial Sb2O3(111)/beta-Sb(001) heterostructures. Exact Sb growth behavior depends on processing and substrate properties including, notably, the support underneath the graphene. Our work elucidates the rich phase and epitaxy landscape in 2D Sb and 2D Sb/graphene heterostructures.

Organisation(s)
Physics of Nanostructured Materials, Department of Lithospheric Research
External organisation(s)
GETec Microscopy GmbH, Technische Universität Wien
Journal
npj 2D Materials and Applications
Volume
5
No. of pages
11
ISSN
2397-7132
DOI
https://doi.org/10.1038/s41699-021-00230-3
Publication date
05-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103042 Electron microscopy, 103018 Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/resolving-fewlayer-antimonenegraphene-heterostructures(d4806d24-317d-4fbe-a3ed-dcfefdb004c2).html