期刊
THIN SOLID FILMS
卷 531, 期 -, 页码 255-260出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2012.12.039
关键词
Titanium dioxide; Nanorods; Wettability; Hydrophobicity; Triethoxyoctylsilane; Hydrothermal deposition
类别
资金
- National Natural Science Foundation of China [11074314, 50942021]
- Fundamental Research Funds for the Central Universities [CDJXS10102207]
- Visiting Scholarship of State Key Laboratory of Power Transmission Equipment & System Security and New Technology [2007DA10512711403]
Nanostructured TiO2 arrays were prepared through a facile and environmentally friendly hydrothermal method on fluorine-doped tin oxide coated glass substrates with tunable surface morphologies without using any catalysts, seeds or templates. Their crystal structure, surface morphology, compositions and wettability were investigated by X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectroscope and contact angle measurements, respectively. It is found that the concentration of hydrochloric acid has a great influence on the morphology and wettability of TiO2 nanorod films. Typically, the film prepared with 7.0 M HCl exhibits a high water contact angle of 157.3 +/- 1.5 degrees with an advancing contact angle of 154.2 +/- 1.3 degrees and a receding contact angle of 161.2 +/- 1.3 degrees and a small sliding angle of 7 degrees after hydrophobic treatment. The Cassie theory was used to analyze the hydrophobic phenomenon of the as-prepared film, and it reveals that only about 9% of the water surface is contacted with the TiO2 film and the remaining 91% is contacted with the air cushion, which is reasonable for the hydrophobicity of a TiO2 nanorod film. (C) 2012 Elsevier B.V. All rights reserved.
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