Chemistry below graphene: Decoupling epitaxial graphene from metals by potential-controlled electrochemical oxidation
Entity
UAM. Departamento de Química Física AplicadaPublisher
Elsevier Ltd.Date
2018-04-01Citation
10.1016/j.carbon.2017.12.104
Carbon 129 (2018): 837-846
ISSN
0008-6223DOI
10.1016/j.carbon.2017.12.104Funded by
We acknowledge funding from the Spanish MINECO (Grants MAT2014-54231-C4-1-P, MAT2014-54231-C4-4-P, MAT2013- 47898-C2-2-R and MAT2017-85089-C2-1-R), the EU via the ERCSynergy Program (Grant ERC-2013-SYG-610256 NANOCOSMOS), the innovation program under grant agreement No. 696656 (GrapheneCore1- Graphene-based disruptive technologies), the Comunidad Aut_onoma de Madrid (CAM) MAD2D-CM Program (S2013/ MIT-3007) and computing resources from CTI-CSIC. GOI acknowledges financial support from FCT, Ministry of Science and Technology, Portugal (Grant No. PTDC/CTM-NAN/121108/2010 and IF/ 01054/2015). EL acknowledges funding from Spanish “Consolider” project CSD2010-00024. JIM acknowledges the financial support by the “Ramón y Cajal” Program of MINECO (Grant RYC-2015-17730) and NANOCOSMOSProject
Gobierno de España. MAT2014-54231-C4-1-P; Gobierno de España. MAT2014-54231-C4-4-P; Gobierno de España. MAT2013- 47898-C2-2-R; Gobierno de España. MAT2017-85089-C2-1-R; info:eu-repo/grantAgreement/EC/FP/696656; Comunidad de Madrid. S2013/ MIT-3007/MAD2DEditor's Version
https://doi.org/10.1016/j.carbon.2017.12.104Subjects
Decoupling; Electrochemistry; Graphene; Intercalation; Metals; Física; QuímicaRights
© 2018 The AuthorsEsta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
While high-quality defect-free epitaxial graphene can be efficiently grown on metal substrates, strong interaction with the supporting metal quenches its outstanding properties. Thus, protocols to transfer graphene to insulating substrates are obligatory, and these often severely impair graphene properties by the introduction of structural or chemical defects. Here we describe a simple and easily scalable general methodology to structurally and electronically decouple epitaxial graphene from Pt(111) and Ir(111) metal surfaces. A multi-technique characterization combined with ab-initio calculations was employed to fully explain the different steps involved in the process. It was shown that, after a controlled electrochemical oxidation process, a single-atom thick metal-hydroxide layer intercalates below graphene, decoupling it from the metal substrate. This decoupling process occurs without disrupting the morphology and electronic properties of graphene. The results suggest that suitably optimized electrochemical treatments may provide effective alternatives to current transfer protocols for graphene and other 2D materials on diverse metal surfaces
Files in this item
Google Scholar:Palacio, Irene
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Otero-Irurueta, Gonzalo
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Alonso, Concepción
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Martínez, José Ignacio
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López-Elvira, Elena
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Muñoz-Ochando, Isabel
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Salavagione, Horacio J.
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López, María F.
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García-Hernández, Mar
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Méndez, Javier
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Ellis, Gary J.
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Martín-Gago, José A.
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