Graphene coatings: an efficient protection from oxidation
buir.contributor.author | Çıracı, Salim | |
buir.contributor.orcid | Çıracı, Salim|0000-0001-8023-9860 | |
dc.citation.epage | 155445-7 | en_US |
dc.citation.issueNumber | 15 | en_US |
dc.citation.spage | 155445-1 | en_US |
dc.citation.volumeNumber | 85 | en_US |
dc.contributor.author | Topsakal, M. | en_US |
dc.contributor.author | Şahin, H. | en_US |
dc.contributor.author | Çıracı, Salim | en_US |
dc.date.accessioned | 2016-02-08T09:47:15Z | |
dc.date.available | 2016-02-08T09:47:15Z | |
dc.date.issued | 2012 | en_US |
dc.department | Institute of Materials Science and Nanotechnology (UNAM) | en_US |
dc.department | Department of Physics | en_US |
dc.description.abstract | We 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.provenance | Made 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: 2012 | en |
dc.identifier.doi | 10.1103/PhysRevB.85.155445 | en_US |
dc.identifier.eissn | 2469-9969 | |
dc.identifier.issn | 2469-9950 | |
dc.identifier.uri | http://hdl.handle.net/11693/21501 | |
dc.language.iso | English | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevB.85.155445 | en_US |
dc.source.title | Physical Review B - Condensed Matter and Materials Physics | en_US |
dc.subject | 81.16.Pr | en_US |
dc.subject | 68.65.Pq | en_US |
dc.subject | 66.30.Pa | en_US |
dc.subject | 81.05.ue | en_US |
dc.title | Graphene coatings: an efficient protection from oxidation | en_US |
dc.type | Article | en_US |
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