title: Bottom-up approach for the low-cost synthesis of graphene-alumina nanosheet interfaces using bimetallic alloys.
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.
authors.affiliation: Department of Physics, University of Trieste, Via Valerio 2, 34127 Trieste, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Omiciuolo
authors.affiliation: Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Campus de Cantoblanco, 28049 Madrid, Spain.
authors.forename: Eduardo R
authors.initials: ER
authors.lastname: Hernández
authors.affiliation: Department of Physics, University of Trieste, Via Valerio 2, 34127 Trieste, Italy.
authors.forename: Elisa
authors.initials: E
authors.lastname: Miniussi
authors.affiliation: Department of Physics, University of Trieste, Via Valerio 2, 34127 Trieste, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Orlando
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14, Km 163.5, 34149 Trieste, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Lacovig
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14, Km 163.5, 34149 Trieste, Italy.
authors.forename: Silvano
authors.initials: S
authors.lastname: Lizzit
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14, Km 163.5, 34149 Trieste, Italy.
authors.forename: Tevfik Onur
authors.initials: TO
authors.lastname: Menteş
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14, Km 163.5, 34149 Trieste, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Locatelli
authors.affiliation: CNR, Institute for Complex Systems, Via Fosso del Cavaliere 100, 00133 Roma, Italy.
authors.forename: Rosanna
authors.initials: R
authors.lastname: Larciprete
authors.affiliation: Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark.
authors.forename: Marco
authors.initials: M
authors.lastname: Bianchi
authors.affiliation: Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark.
authors.forename: Søren
authors.initials: S
authors.lastname: Ulstrup
authors.affiliation: Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark.
authors.forename: Philip
authors.initials: P
authors.lastname: Hofmann
authors.affiliation: 1] Department of Earth Sciences, TYC@UCL, and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK [2] Department of Physics and Astronomy, TYC@UCL, and London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK [3] IOM-CNR, DEMOCRITOS National Simulation Centre, I-34100 Trieste, Italy.
authors.forename: Dario
authors.initials: D
authors.lastname: Alfè
authors.affiliation: 1] Department of Physics, University of Trieste, Via Valerio 2, 34127 Trieste, Italy [2] Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14, Km 163.5, 34149 Trieste, Italy [3] IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, I-34149 Trieste, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Baraldi