Graphene coatings: an efficient protection from oxidation

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buir.contributor.authorÇıracı, Salim
buir.contributor.orcidÇıracı, Salim|0000-0001-8023-9860
dc.citation.epage155445-7en_US
dc.citation.issueNumber15en_US
dc.citation.spage155445-1en_US
dc.citation.volumeNumber85en_US
dc.contributor.authorTopsakal, M.en_US
dc.contributor.authorŞahin, H.en_US
dc.contributor.authorÇıracı, Salimen_US
dc.date.accessioned2016-02-08T09:47:15Z
dc.date.available2016-02-08T09:47:15Z
dc.date.issued2012en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe demonstrate that graphene coating can provide efficient protection from oxidation by posing a high-energy barrier to the path of oxygen atom, which could have penetrated from the top of the graphene to the reactive surface underneath. A graphene bilayer, which blocks the diffusion of oxygen with a relatively higher energy barrier, provides even better protection from oxidation. While an oxygen molecule is weakly bound to a bare graphene surface and hence becomes rather inactive, it can easily dissociate into two oxygen atoms adsorbed to low-coordinated carbon atoms at the edges of a vacancy. For these oxygen atoms the oxidation barrier is reduced and hence the protection from oxidation provided by graphene coatings is weakened. Our predictions obtained from the state-of-the-art first-principles calculations of the electronic structure, phonon density of states, and reaction path will unravel how graphene can be used as a corrosion-resistant coating and guide further studies aimed at developing more efficient nanocoatings. © 2012 American Physical Society.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T09:47:15Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2012en
dc.identifier.doi10.1103/PhysRevB.85.155445en_US
dc.identifier.eissn2469-9969
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/11693/21501
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.85.155445en_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.subject81.16.Pren_US
dc.subject68.65.Pqen_US
dc.subject66.30.Paen_US
dc.subject81.05.ueen_US
dc.titleGraphene coatings: an efficient protection from oxidationen_US
dc.typeArticleen_US

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