Journal article
Hexagonal metal oxide monolayers derived from the metal–gas interface
BY Zhang, K Xu, Q Yao, A Jannat, G Ren, MR Field, X Wen, C Zhou, A Zavabeti, JZ Ou
Nature Materials | Published : 2021
Abstract
Two-dimensional (2D) crystals are promising materials for developing future nano-enabled technologies1–6. The cleavage of weak, interlayer van der Waals bonds in layered bulk crystals enables the production of high-quality 2D, atomically thin monolayers7–10. Nonetheless, as earth-abundant compounds, metal oxides are rarely accessible as pure and fully stoichiometric monolayers owing to their ion-stabilized ‘lamellar’ bulk structure11–14. Here, we report the discovery of a layered planar hexagonal phase of oxides from elements across the transition metals, post-transition metals, lanthanides and metalloids, derived from strictly controlled oxidation at the metal–gas interface. The highly crys..
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Awarded by National Natural Science Foundation of China
Funding Acknowledgements
B.Z. and J.O. acknowledge the support received from the Australian Research Council (DE160100715). A.Z. acknowledges the financial support received through the McKenzie Fellowship programme. B.Z., A.Z. and J.O. acknowledge the support from ARC Future Low Energy Electronics Technologies (FLEET) centre of excellence (CE170100039). Q.Y. acknowledges the financial support of National Natural Science Foundation of China (11904026) and Beijing Natural Science Foundation (1194021). This work was performed in part at RMIT Micro Nano Research Facility (MNRF) in the Victorian Node of the Australian National Fabrication Facility (ANFF), and the facilities of RMIT Microscopy & Microanalysis Facility (RMMF). We thank P. Rummel, Z. Li, Y. Hu, Y. Cao, E. Mayes and N. Pillai for their technical support.