STM-electroluminescence from clustered C3N4 nanodomains synthesized via green chemistry process

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dc.creatorEverton Pereira de Andrade
dc.creatorBarbara Brenda de Almeida Costa
dc.creatorC. R. Chaves
dc.creatorAna Maria de Paula
dc.creatorLuiz Alberto Cury
dc.creatorÂngelo Malachias de Souza
dc.creatorGustavo de Almeida Magalhães Sáfar
dc.date.accessioned2023-10-31T12:03:23Z
dc.date.accessioned2025-09-08T23:21:03Z
dc.date.available2023-10-31T12:03:23Z
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.identifier.doihttps://doi.org/10.1016/j.ultsonch.2017.08.021
dc.identifier.issn1350-4177
dc.identifier.urihttps://hdl.handle.net/1843/60301
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofUltrasonics Sonochemistry
dc.rightsAcesso Restrito
dc.subjectEletroluminescência
dc.subjectDifração
dc.subjectRaios X
dc.subjectScanning tunneling microscopy
dc.subjectQuímica verde
dc.subject.otherSTM-electroluminescence
dc.subject.otherGraphitic carbon nitride
dc.subject.otherGreen process
dc.subject.otherX-ray diffraction
dc.subject.otherSTM/STS
dc.subject.otherSonication
dc.titleSTM-electroluminescence from clustered C3N4 nanodomains synthesized via green chemistry process
dc.typeArtigo de periódico
local.citation.epage747
local.citation.issuePart A
local.citation.spage742
local.citation.volume40
local.description.resumoA Scanning Tunneling Microscopy/Spectroscopy (STM/STS) and synchrotron X-ray diffraction study on clus- tered C3N 4 nanoparticles (nanoflakes) is conducted on green-chemistry synthesized samples obtained from chitosan through high power sonication. Morphological aspects and the electronic characteristics are in- vestigated. The observed bandgap of the nanoflakes reveals the presence of different phases in the material. Combining STM morphology, STS spectra and X-ray diffraction (XRD) results one finds that the most abundant phase is graphitic C3 N4. A high density of defects is inferred from the XRD measurements. Additionally, STM- electroluminescence (STMEL) is detected in C3 N4 nanoflakes deposited on a gold substrate. The tunneling current creates photons that are three times more energetic than the tunneling electrons of the STM sample. We ponder about the two most probable models to explain the observed photon emission energy: either a nonlinear optical phenomenon or a localized state emission.
local.identifier.orcidhttps://orcid.org/0000-0002-3686-2732
local.identifier.orcidhttps://orcid.org/0000-0002-8551-5948
local.identifier.orcidhttps://orcid.org/0000-0002-0763-4431
local.identifier.orcidhttps://orcid.org/0000-0002-8703-4283
local.identifier.orcidhttps://orcid.org/0000-0003-1354-3138
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S1350417717303759?via%3Dihub

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