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

AuthorsOmiciuolo, Luca; Hernández, Eduardo R. ; Miniussi, Elisa; Orlando, Fabrizio; Lacovig, Paolo; Lizzit, Silvano; Menteş, Tevfik Onur; Locatelli, Andrea; Larciprete, Rosanna; Bianchi, Marco; Ulstrup, Soren; Hofmann, Philip; Alfè, Dario; Baraldi, Alessandro
Issue Date29-Sep-2014
PublisherSpringer Nature
CitationNature Communications 5: 5062 (2014)
AbstractAll rights reserved. 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.
Publisher version (URL)http://doi.org/10.1038/ncomms6062
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