Self-assembled triangular graphene nanostructures: evidence of dual electronic response

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dc.creatorThaís Chagas Peixoto Silva
dc.creatorÂngelo Malachias de Souza
dc.creatorMarta Pelc
dc.creatorPedro Henrique Rezende Gonçalves
dc.creatorIgor de Souza Lana Antoniazzi
dc.creatorJhon Wilfer González Salazar
dc.creatorAndrés Ayuela Fernández
dc.creatorJoão Marcelo Jordão Lopes
dc.creatorMyriano Henriques de Oliveira Junior
dc.creatorRogério Magalhães Paniago
dc.date.accessioned2023-04-04T13:11:34Z
dc.date.accessioned2025-09-09T01:30:25Z
dc.date.available2023-04-04T13:11:34Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.identifier.doihttps://doi.org/10.1016/j.carbon.2018.10.059
dc.identifier.issn1873-3891
dc.identifier.urihttps://hdl.handle.net/1843/51537
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofCarbon
dc.rightsAcesso Restrito
dc.subjectGrafeno
dc.subjectMicroscopia de tunelamento de varredura
dc.subjectAnálise espectral
dc.subject.otherGraphene
dc.subject.otherScanning tunneling microscopy
dc.subject.otherSpectroscopy
dc.titleSelf-assembled triangular graphene nanostructures: evidence of dual electronic response
dc.typeArtigo de periódico
local.citation.epage591
local.citation.spage580
local.citation.volume142
local.description.resumoStructural and electronic properties of bilayer graphene films and nanostructures obtained through the graphitization of SiC(0001) were investigated in this work using scanning tunneling microscopy and spectroscopy. We report on the observation of triangular nanostructures which result from extended stacking faults in the SiC substrate and their effects on graphene layers that are formed on top of them. Spectroscopic measurements revealed distinct electronic responses as a function of the local hydrogen intercalation. Spectroscopic signatures ranging from single- to double-layer graphene, as well as intermediate states were observed as a consequence of the (in)complete hydrogen intercalation process. High resolution topographic scanning tunneling microscopy images at resonant bias voltages inside triangular nanostructures reveal that the bottom layer of the bilayer graphene film is still bonded to the substrate. Therefore, the triangular nanostructures present edges and facets with the coexistence of carbon atoms in sp3 and sp2 hybridizations. Using atomistic calculations we have modeled the local density of states of these objects reproducing their electronic response. The generation of regions with distinct electronic responses is potentially interesting for high-density data storage with hidden bit capabilities.
local.identifier.orcidhttps://orcid.org/0000-0001-5688-5985
local.identifier.orcidhttps://orcid.org/0000-0002-8703-4283
local.identifier.orcidhttps://orcid.org/0000-0002-0671-4990
local.identifier.orcidhttps://orcid.org/0000-0001-6773-8921
local.identifier.orcidhttps://orcid.org/0000-0002-0803-6011
local.identifier.orcidhttps://orcid.org/0000-0003-2238-5522
local.identifier.orcidhttps://orcid.org/0000-0001-9611-9556
local.identifier.orcidhttps://orcid.org/0000-0001-5268-1862
local.identifier.orcidhttps://orcid.org/0000-0002-2404-3879
local.identifier.orcidhttps://orcid.org/0000-0002-5203-0944
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0008622318309746

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