| Revista: | Revista mexicana de física |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000438878 |
| ISSN: | 0035-001X |
| Autors: | Luna Cervantes, M1 Hernández Torres, J1 Zamora Peredo, L1 |
| Institucions: | 1Universidad Veracruzana, Centro de Investigación en Micro y Nanotecnología, Boca del Río, Veracruz. México |
| Any: | 2019 |
| Període: | Sep-Oct |
| Volum: | 65 |
| Número: | 5 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, teórico |
| Resumen en inglés | TiO2 nanotubes were prepared by the anodization process of a set of titanium foils in order to study the influence of time and voltage on the morphology of them under a 1.2 wt % NH4F salt concentration, taking advantage of this percent and remarking the great importance of the oxide growth-dissolution speed with this electrolyte concentration. The anodization process consists of an organic media of ethylene glycol, a voltage from 5 to 30 V for a time period from 1 to 6 hours, a constant potential of 30 V for a time lapse from 10 to 360 minutes and 5 to 480 seconds. All anodized samples are rinsed and annealed to 400 ° C for 3 hours to obtain an anatase crystalline structure. The morphological characterization was carried out by Field Emission Scanning Electron Microscopy (FESEM) to verify the presence of the main nanostructures: nanopores, nanotubes, and nanograss. Raman spectroscopy was used for optical characterization in order to identify the changes in the signal of the E g (v6) vibrational mode. It was observed the Raman E g (v6) vibrational mode suffers a redshift at the initial anodization stage with the contribution of the stress between the substrate-oxide layer and the stoichiometry defects. The diameter and tube length have a strong correlation with the oxide thickness (ascendant slope), moreover, this oxide is compared and related to the Raman intensity of the E g (v6) mode, from this fact, it is easy to define some time periods and a voltage range for each titania nanostructures observed |
| Disciplines | Física y astronomía |
| Paraules clau: | Física de materia condensada, Titanio, Nanoporosidad, Nanotubos, Nanograss, Espectroscopía, Raman |
| Keyword: | Condensed matter physics, Titania, Nanoporosity, Nanotubes, Nanograss, Raman spectroscopy |
| Text complet: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
