Exfoliation and characterization of a two-dimensional serpentine-based material.

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dc.contributor.authorSantos, Joyce Cristina da Cruz
dc.contributor.authorBarboza, Ana Paula Moreira
dc.contributor.authorMatos, Matheus Josué de Souza
dc.contributor.authorBarcelos, Ingrid David
dc.contributor.authorFernandes, Thales Fernando Damasceno
dc.contributor.authorSoares, Edmar Avellar
dc.contributor.authorMoreira, Roberto Luiz
dc.contributor.authorNeves, Bernardo Ruegger Almeida
dc.date.accessioned2020-08-13T14:28:22Z
dc.date.available2020-08-13T14:28:22Z
dc.date.issued2019
dc.description.abstractWe report on an experimental investigation of serpentine, an abundant phyllosilicate, as an alternative source of two-dimensional (2D) nanomaterials. We show, through scanning probe microscopy (SPM) measurements, that natural serpentine mineral can be mechanically exfoliated down to few-layer flakes, where monolayers can be easily resolved. The parent serpentine bulk material was initially characterized via conventional techniques like XRD, XPS, FTIR and Raman spectroscopies and the results show that it is predominantly constituted by the antigorite mineral. From ab initio calculations using density functional theory, we also determine the geometry and electronic structure of antigorite, the observed structural form of serpentine. Additionally, we further characterized electrical and mechanical properties of the obtained 2D material flakes using SPM and broadband synchrotron infrared nanospectroscopy. Wavelength tuning of the serpentine vibrational resonances, assigned to in- and out-of-plane molecular vibrations, are observed and compared with the FTIR characterization of the parent bulk material. They show that there is no degradation of serpentine's structural properties during its mechanical exfoliation down to nanometer-thin sheets. Therefore, our results introduce the serpentine mineral as an attractive low-cost candidate in 2D materials applications.pt_BR
dc.identifier.citationSANTOS, J. C. da C. et al. Exfoliation and characterization of a two-dimensional serpentine-based material. Nanotechnology, v. 30, n. 445705, ago. 2019. Disponível em: <https://iopscience.iop.org/article/10.1088/1361-6528/ab3732>. Acesso em: 03 jul. 2020.pt_BR
dc.identifier.doihttps://doi.org/10.1088/1361-6528/ab3732pt_BR
dc.identifier.issn1361-6528
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12584
dc.identifier.uri2https://iopscience.iop.org/article/10.1088/1361-6528/ab3732pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectAntigoritept_BR
dc.subjectMechanical exfoliationpt_BR
dc.subjectScanning probe microscopypt_BR
dc.titleExfoliation and characterization of a two-dimensional serpentine-based material.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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