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Fine tuning of graphene-metal adhesion by surface alloying

Alfe, D; Pozzo, M; Miniussi, E; Guenther, S; Lacovig, P; Lizzit, S; Larciprete, R; ... Baraldi, A; + view all (2013) Fine tuning of graphene-metal adhesion by surface alloying. Scientific Reports , 3 , Article 2430. 10.1038/srep02430. Green open access

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Abstract

We show that bimetallic surface alloying provides a viable route for governing the interaction between graphene and metal through the selective choice of the elemental composition of the surface alloy. This concept is illustrated by an experimental and theoretical characterization of the properties of graphene on a model PtRu surface alloy on Ru(0001), with a concentration of Pt atoms in the first layer between 0 and 50%. The progressive increase of the Pt content determines the gradual detachment of graphene from the substrate, which results from the modification of the carbon orbital hybridization promoted by Pt. Alloying is also found to affect the morphology of graphene, which is strongly corrugated on bare Ru, but becomes flat at a Pt coverage of 50%. The method here proposed can be readily extended to several supports, thus opening the way to the conformal growth of graphene on metals and to a full tunability of the graphene-substrate interaction.

Type: Article
Title: Fine tuning of graphene-metal adhesion by surface alloying
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/srep02430
Publisher version: http://dx.doi.org/10.1038/srep02430
Language: English
Additional information: This work is licensed under a Creative Commons Attribution- NonCommercial-NoDerivs 3.0 Unported license. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0.PubMed ID: 23938361
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1405299
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