Back to Search
Start Over
Seed-assisted growth of epitaxial ZnO nanorod arrays with self-organized periodicity and directional alignment
- Source :
-
Applied Surface Science . Oct2011, Vol. 258 Issue 1, p556-564. 9p. - Publication Year :
- 2011
-
Abstract
- Abstract: In this article we report the seed-assisted growth of epitaxial ZnO nanorod (NR) arrays on (0001) plane sapphire substrates at low temperatures in aqueous solutions. The self-organized periodic ZnO NR rows with a fairly constant separation were directly grown on bare sapphire surfaces, without the need for any complicated lithography or use of pre-patterned catalysts. The spatial ordering of the ZnO NRs was significantly influenced by the seed growth conditions and by the presence of a self-organized step structure on the annealed sapphire surface. In addition, the effect of the conditions employed to prepare the seeds, including growth parameters and post-growth annealing treatment, on the epitaxial relationship between the ZnO NRs and the sapphire substrate was systematically investigated by X-ray diffraction (XRD) measurements and transmission electron microscopy (TEM) observations. Post-growth annealing of the ZnO seeds changed the morphologies and crystallographic alignment of the generated ZnO nanostructures significantly, as a result of the formation of epitaxial spinel ZnAl2O4 interlayers, facilitated by zinc cation diffusion and solid state reactions at high temperature. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 258
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 66660879
- Full Text :
- https://doi.org/10.1016/j.apsusc.2011.08.069