Phase transition and electronic structure investigation of MoS2-reduced graphene oxide nanocomposite decorated with Au nanoparticles

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Autor(es): dc.contributorUNILA-
Autor(es): dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)-
Autor(es): dc.contributorMackenzie Presbyterian University-
Autor(es): dc.contributorSENAI Innovation Institute for Virtual Production Systems-
Autor(es): dc.contributorBrazilian Center for Research in Energy and Materials (CNPEM)-
Autor(es): dc.contributorUniversidad Privada Del Norte-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorGarcia-Basabe, Yunier-
Autor(es): dc.creatorPeixoto, Gabriela F.-
Autor(es): dc.creatorGrasseschi, Daniel-
Autor(es): dc.creatorRomani, Eric C.-
Autor(es): dc.creatorVicentin, Flávio C.-
Autor(es): dc.creatorVillegas, Cesar E. P.-
Autor(es): dc.creatorRocha, Alexandre R. [UNESP]-
Autor(es): dc.creatorLarrude, Dunieskys G.-
Data de aceite: dc.date.accessioned2022-02-22T00:27:39Z-
Data de disponibilização: dc.date.available2022-02-22T00:27:39Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-09-09-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1088/1361-6528/ab3c91-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199541-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199541-
Descrição: dc.descriptionIn this work a simple approach to transform MoS2 from its metallic (1T′ to semiconductor 2H) character via gold nanoparticle surface decoration of a MoS2 reduced graphene oxide (rGO) nanocomposite is proposed. The possible mechanism to this phase transformation was investigated using different spectroscopy techniques, and supported by density functional theory theoretical calculations. A mixture of the 1T′- and 2H-MoS2 phases was observed from the Raman and Mo 3d high resolution x-ray photoelectron spectra analysis in the MoS2-rGO nanocomposite. After surface decoration with gold nanoparticles the concentration of the 1T′ phase decreases making evident a phase transformation. According to Raman and valence band spectra analyzes, the Au nanoparticles (NPs) induce a p-type doping in MoS2-rGO nanocomposite. We proposed as a main mechanism to the MoS2 phase transformation the electron transfer from Mo 4dxy,xz,yz in 1T′ phase to AuNPs conduction band. At the same time, the unoccupied electronic structure was investigated from S K-edge near edge x-ray absorption fine structure spectroscopy. Finally, the electronic coupling between unoccupied electronic states was investigated by the core hole clock approach using resonant Auger spectroscopy, showing that AuNPs affect mainly the MoS2 electronic states close to Fermi level.-
Descrição: dc.descriptionUniversidade Federal da Integracao Latino-Americana UNILA-
Descrição: dc.descriptionInorganic Chemistry Department Chemistry Institute Federal University of Rio de Janeiro (UFRJ)-
Descrição: dc.descriptionMackGraphe-Graphene and Nanomaterial Research Center Mackenzie Presbyterian University-
Descrição: dc.descriptionSENAI Innovation Institute for Virtual Production Systems-
Descrição: dc.descriptionBrazilian Synchrotron Light Laboratory (LNLS) Brazilian Center for Research in Energy and Materials (CNPEM)-
Descrição: dc.descriptionDepartamento de Ciencias Universidad Privada Del Norte, Av. Andrés Belaunde Cdra. 10 s/n, Comas-
Descrição: dc.descriptionInstituto de Física Teórica State University of Sao Paulo (UNESP)-
Descrição: dc.descriptionInstituto de Física Teórica State University of Sao Paulo (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationNanotechnology-
???dc.source???: dc.sourceScopus-
Título: dc.titlePhase transition and electronic structure investigation of MoS2-reduced graphene oxide nanocomposite decorated with Au nanoparticles-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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