Growth temperature dependent properties of ZnO nanorod arrays on glass substrate prepared by wet chemical method
| Autor: | Si Nae Heo, Bon Heun Koo, Faheem Ahmed |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Photoluminescence
Materials science Process Chemistry and Technology Exciton Analytical chemistry Nanotechnology Substrate (electronics) Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake Crystallinity Materials Chemistry Ceramics and Composites symbols Light emission Nanorod Raman spectroscopy Wurtzite crystal structure |
| Zdroj: | Ceramics International. 40:5467-5471 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2013.10.134 |
| Popis: | In this work, ZnO nanorod arrays were grown on glass substrate by the wet chemical method, and the effect of synthesis temperature on the properties was investigated. The grown nanorods were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Raman and Photoluminescence (PL) measurements. XRD pattern showed that nanorod prepared at 80 °C and 90 °C has high crystallinity with wurtzite structure and orientated along the c -axis. However, nanorods were not formed at 60 °C and 70 °C due to less energy supply for the growth of the ZnO. FE-SEM results showed that the morphology and the size of ZnO can be effectively controlled. In particular, as the temperature increased, diameter of the nanorod was increased while length decreased. Raman scattering spectra of ZnO nanorod arrays revealed the characteristic E 2 high mode that is related to the vibration of oxygen atoms in the wurtzite ZnO. Room-temperature PL spectra of the ZnO nanorods revealed a near-band-edge (NBE) emission peak. The NBE (UV light emission) band at ~383 nm might be attributed to the recombination of free exciton. The narrow full-width at half-maximum (FWHM) of the UV emission indicated that ZnO nanorods had high crystallinity. |
| Databáze: | OpenAIRE |
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