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http://hdl.handle.net/1843/58325| Type: | Artigo de Periódico |
| Title: | Exfoliation and characterization of a two-dimensional serpentine-based material |
| Authors: | Joyce Cristina da Cruz Santos Ana Paula Moreira Barboza Matheus Josué de Souza Matos Ingrid David Barcelos Thales Fernando Damasceno Fernandes Edmar Avellar Soares Roberto Luiz Moreira Bernardo Ruegger Almeida Neves |
| Abstract: | 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. |
| Subject: | Serpentina (Mineralogia) Scanning probe microscopy |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1088/1361-6528/ab3732 |
| URI: | http://hdl.handle.net/1843/58325 |
| Issue Date: | 2019 |
| metadata.dc.url.externa: | https://iopscience.iop.org/article/10.1088/1361-6528/ab3732 |
| metadata.dc.relation.ispartof: | Nanotechnology |
| Appears in Collections: | Artigo de Periódico |
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