Bottom-up approach for the low-cost synthesis of graphene-alumina nanosheet interfaces using bimetallic alloys

Luca Omiciuolo, Eduardo R. Hernández, Elisa Miniussi, Fabrizio Orlando, Paolo Lacovig, Silvano Lizzit, Tevfik Onur Menteş, Andrea Locatelli, Rosanna Larciprete, Marco Bianchi, Søren Ulstrup, Philip Hofmann, Dario Alfè and Alessandro Baraldi ()
Additional contact information
Luca Omiciuolo: University of Trieste
Eduardo R. Hernández: Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Campus de Cantoblanco
Elisa Miniussi: University of Trieste
Fabrizio Orlando: University of Trieste
Paolo Lacovig: Elettra-Sincrotrone Trieste S.C.p.A.
Silvano Lizzit: Elettra-Sincrotrone Trieste S.C.p.A.
Tevfik Onur Menteş: Elettra-Sincrotrone Trieste S.C.p.A.
Andrea Locatelli: Elettra-Sincrotrone Trieste S.C.p.A.
Rosanna Larciprete: CNR, Institute for Complex Systems
Marco Bianchi: Interdisciplinary Nanoscience Center, Aarhus University
Søren Ulstrup: Interdisciplinary Nanoscience Center, Aarhus University
Philip Hofmann: Interdisciplinary Nanoscience Center, Aarhus University
Dario Alfè: TYC@UCL, and London Centre for Nanotechnology, University College London
Alessandro Baraldi: University of Trieste

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract The production of high-quality graphene-oxide interfaces is normally achieved by graphene growth via chemical vapour deposition on a metallic surface, followed by transfer of the C layer onto the oxide, by atomic layer and physical vapour deposition of the oxide on graphene or by carbon deposition on top of oxide surfaces. These methods, however, come with a series of issues: they are complex, costly and can easily result in damage to the carbon network, with detrimental effects on the carrier mobility. Here we show that the growth of a graphene layer on a bimetallic Ni3Al alloy and its subsequent exposure to oxygen at 520 K result in the formation of a 1.5 nm thick alumina nanosheet underneath graphene. This new, simple and low-cost strategy based on the use of alloys opens a promising route to the direct synthesis of a wide range of interfaces formed by graphene and high-κ dielectrics.

Date: 2014
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DOI: 10.1038/ncomms6062

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