Omiciuolo, L; Hernández, ER; Miniussi, E; Orlando, F; Lacovig, P; Lizzit, S; Menteş, TO; ... Baraldi, A; + view all Omiciuolo, L; Hernández, ER; Miniussi, E; Orlando, F; Lacovig, P; Lizzit, S; Menteş, TO; Locatelli, A; Larciprete, R; Bianchi, M; Ulstrup, S; Hofmann, P; Alfè, D; Baraldi, A; - view fewer (2014) Bottom-up approach for the low-cost synthesis of graphene-alumina nanosheet interfaces using bimetallic alloys. Nature Communications , 5 , Article 5062. 10.1038/ncomms6062.

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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.

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