Metal-graphene heterojunction modulation via H2 interaction

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dc.creatorAlisson Ronieri Cadore
dc.creatorEdrian Mania
dc.creatorEvandro Augusto de Morais
dc.creatorKenji Watanabe
dc.creatorTaniguchi Takashi
dc.creatorRodrigo Gribel Lacerda
dc.creatorLeonardo Cristiano Campos
dc.date.accessioned2025-02-24T19:17:37Z
dc.date.accessioned2025-09-09T00:21:06Z
dc.date.available2025-02-24T19:17:37Z
dc.date.issued2016
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/10.1063/1.4959560
dc.identifier.issn1077-3118
dc.identifier.urihttps://hdl.handle.net/1843/80380
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofApplied Physics Letters
dc.rightsAcesso Restrito
dc.subjectGrafeno
dc.subjectTransporte eletrônico
dc.subjectHeteroestruturas
dc.subjectMetais de transição
dc.subjectElementos químicos
dc.subjectForças intermoleculares
dc.subject.otherGraphene
dc.subject.otherSelective sensor
dc.subject.otherHeterojunction
dc.subject.otherPN junction
dc.subject.otherElectronic transport
dc.subject.otherContact impedance
dc.subject.otherHeterostructures
dc.subject.otherCarbon based materials
dc.subject.otherTransition metals
dc.subject.otherChemical elements
dc.subject.otherIntermolecular forces
dc.subject.otherMaxwell-Boltzmann distribution
dc.titleMetal-graphene heterojunction modulation via H2 interaction
dc.typeArtigo de periódico
local.citation.issue3
local.citation.volume109
local.description.resumoCombining experiment and theory, we investigate how a naturally created heterojunction (pn junction) at a graphene and metallic contact interface is modulated via interaction with molecular hydrogen (H2). Due to an electrostatic interaction, metallic electrodes induce pn junctions in graphene, leading to an asymmetrical resistance in electronic transport for electrons and holes. We report that the asymmetry in the resistance can be tuned in a reversible manner by exposing graphene devices to H2. The interaction between the H2 and graphene occurs solely at the graphene-contact pn junction and induces a modification on the electrostatic interaction between graphene and metallic contacts. We explain the experimental data with theory providing information concerning the length of the heterojunction and how it changes as a function of H2 adsorption. Our results are valuable for understanding the nature of the metal-graphene interfaces and have potential application for selective sensors of molecular hydrogen.
local.identifier.orcidhttps://orcid.org/0000-0003-1081-0915
local.identifier.orcidhttps://orcid.org/0000-0001-9927-7656
local.identifier.orcidhttps://orcid.org/0000-0003-3701-8119
local.identifier.orcidhttps://orcid.org/0000-0003-4777-7370
local.identifier.orcidhttps://orcid.org/0000-0001-6792-7554
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.aip.org/aip/apl/article-abstract/109/3/033109/1078294/Metal-graphene-heterojunction-modulation-via-H2?redirectedFrom=fulltext

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