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Título: | Exfoliation and characterization of a two-dimensional serpentine-based material. |
Autor(es): | Santos, Joyce Cristina da Cruz Barboza, Ana Paula Moreira Matos, Matheus Josué de Souza Barcelos, Ingrid David Fernandes, Thales Fernando Damasceno Soares, Edmar Avellar Moreira, Roberto Luiz Neves, Bernardo Ruegger Almeida |
Palavras-chave: | Antigorite Mechanical exfoliation Scanning probe microscopy |
Data do documento: | 2019 |
Referência: | SANTOS, 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. |
Resumo: | We 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. |
URI: | http://www.repositorio.ufop.br/handle/123456789/12584 |
Link para o artigo: | https://iopscience.iop.org/article/10.1088/1361-6528/ab3732 |
DOI: | https://doi.org/10.1088/1361-6528/ab3732 |
ISSN: | 1361-6528 |
Aparece nas coleções: | DEFIS - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_ExfoliationCharacterizationTwo.pdf Restricted Access | 1,31 MB | Adobe PDF | Visualizar/Abrir |
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