Zinc Oxide Nanostructures Synthesized by Thermal Oxidation of Zinc Powder on Si Substrate

Abstract:

ZnO nanowhiskers were formed by a simple oxidation of metallic zinc powder 99.9% at different temperatures from 400-900 °C for 2 hours on the silicon substrate. The result can be obtained after the thermal oxidation process, the ZnO nanowhiskers with different morphologies at different temperatures in which these morphologies and composition of ZnO nanostructures were characterized by scanning electron microscope, (SEM) and X-ray diffraction, XRD. It was found that the products were nanowhiskers, the structure are triangular shapes with average width of 10-50 nm at the root, 10-30 nm at the tip and length in the range of 1-3 μm was observed by SEM. Temperature in the range of 600-700 °C was suitable for the preparation of ZnO nanowhiskers. At higher temperature of 800 °C, the concentrations of ZnO structures become lower and stronger. At the oxidized temperature of 900 °C, ZnO nanowhiskers were not found and surface morphology become to porous. These results indicate that the oxidation rate is faster than the diffusion rate of Zn vapor on the surface of ZnO nuclei.

• Periodical: Applied Mechanics and Materials (Volume 328)
• Pages: 710-714
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.328.710
• Online since: June 2013
• Authors: Suttinart Noothongkaew, Supakorn Pukird, Worasak Sukkabot, Bualoy Kasemporn, Prayoon Songsiririttikul, Ki Seok An
• Keywords: Nano-Whiskers, Thermal Oxidation, Zinc Oxide (ZnO)

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