Low-temperature oxidation effects on the morphological and structural properties of hexagonal Zn nanodisks
Ambient-atmosphere oxidation in the temperature range of 90-450 ◦ C was performed over Zn films composed by well-faceted hexagonal nanodisks, which were deposited by thermal evaporation. Morphological and structural properties of oxidized Zn nanodisks were studied by scanning electron microscopy, tr...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Institución: | Universidad Autónoma del Estado de México |
| Repositorio: | Redalyc-UAEMEX |
| OAI Identifier: | oai:redalyc.org:57050930002 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57050930002 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Zn nanodisks ZnO nanoneedles thermal oxidation |
| Sumario: | Ambient-atmosphere oxidation in the temperature range of 90-450 ◦ C was performed over Zn films composed by well-faceted hexagonal nanodisks, which were deposited by thermal evaporation. Morphological and structural properties of oxidized Zn nanodisks were studied by scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and Raman scattering measurements. It was found that Zn nanodisks keep its original shape only when they are annealed at 90 or 150 ◦ C. Smooth oxidation ocurred only on the rectangular faces of Zn nandodisks heated at 150 ◦ C. Thermal oxidation at 250 ◦ C favored growth of ZnO nanoneedles over the surface of the Zn nanodisks. Hexagonal-shape of Zn nanodisks was transformed completely into a complex morphology composed by different shaped particles, with further increase in oxidation temperature to 450 ◦ C. |
|---|