Epitaxial growth mechanisms of graphene and effects of substrates

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buir.contributor.authorÇıracı, Salim
buir.contributor.orcidÇıracı, Salim|0000-0001-8023-9860
dc.citation.epage235456-7en_US
dc.citation.issueNumber23en_US
dc.citation.spage235456-1en_US
dc.citation.volumeNumber85en_US
dc.contributor.authorÖzçelik, V. O.en_US
dc.contributor.authorCahangirov, S.en_US
dc.contributor.authorÇıracı, Salimen_US
dc.date.accessioned2016-02-08T09:46:08Z
dc.date.available2016-02-08T09:46:08Z
dc.date.issued2012en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThe growth process of single layer graphene with and without substrate is investigated using ab initio, finite temperature molecular dynamic calculations within density functional theory. An understanding of the epitaxial graphene growth mechanisms in the atomic level is provided by exploring the transient stages which occur at the growing edges of graphene. These stages are formation and collapse of large carbon rings together with the formation and healing of Stone-Wales like pentagon-heptagon defects. The activation barriers for the healing of these growth induced defects on various substrates are calculated using the climbing image nudge elastic band method and compared with that of the Stone-Wales defect. It is found that the healing of pentagon-heptagon defects occurring near the edge in the course of growth is much easier than that of Stone-Wales defect. The role of the substrate in the epitaxial growth and in the healing of defects are also investigated in detail, along with the effects of using carbon dimers as the building blocks of graphene growth. © 2012 American Physical Society.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T09:46:08Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2012en
dc.identifier.doi10.1103/PhysRevB.85.235456en_US
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/11693/21427
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.85.235456en_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleEpitaxial growth mechanisms of graphene and effects of substratesen_US
dc.typeArticleen_US

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