Dense and high-hydrophobic rutile TiO2 nanorod arrays |
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Authors: | X. Peng A. Chen |
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Affiliation: | (1) Department of Chemistry, Lakehead University, Thunder Bay, Ontario, P7B 5E1, Canada |
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Abstract: | Dense and well-oriented rutile TiO2 nanorod arrays were synthesized on a titanium substrate using the organic compound dibutyltin dilaurate as the oxygen source in the oxidation of Ti at 850 °C. The influence of temperature on the nanostructured TiO2 formation and the effect of the TiO2 structures on their wettability were also investigated. Polycrystalline TiO2 grains were formed at 800 °C; in contrast, TiO2 micro-whiskers were grown on the Ti substrate at 900 °C. The measurement of the water contact angle shows that the wetting property of the TiO2 films strongly depends on their surface structure. The surface of the dense well-oriented nanorod arrays is highly hydrophobic with a water contact angle of 130 °C. This study has demonstrated that the direct oxidation of Ti substrate using an organic oxygen source is a promising method for fabrication of large scale, uniform and well-aligned TiO2 nanorod arrays on titanium substrates. PACS 81.16.-Be; 81.20.ka; 82.4c.Cc; 68.37.Hk |
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