Fabrication of patterned TiO2 thin film by a wet process |
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Authors: | Jin-Ho Kim Mi Jai Lee Seiki Kim Jonghee Hwang Tae-Young Lim Sae-Hoon Kim |
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Affiliation: | 1. Korea Institute of Ceramic Engineering and Technology, Seoul, 153-801, Korea 2. Department of Ceramic Engineering, Gangneung-Wonju National University, Kangwon, 210-702, Korea
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Abstract: | Hydrophobic/hydrophilic patterned TiO2 thin film was successfully fabricated on a glass substrate by a wet process. A micro-nano complex structure with a high roughness was fabricated by a layer-by-layer selfassembly and liquid phase deposition (LPD) method. To fabricate superhydrophobic TiO2 thin films, TiO2 nanoparticles were deposited on the surface of (PAH/PAA) thin film by a LPD method and the surface of TiO2 was modified by a hydrophobic treatment using fluoroalkyltrimethoxysilane. The RMS roughness and water contact angle of the prepared TiO2 thin film were ca. 65.6 nm and ca. 155°. The superhydrophobic surface exposed to UV light changed to a hydrophilic surface by the photocatalytic property of TiO2 to decompose a hydrophobic group. Finally, hydrophobic/hydrophilic patterned TiO2 thin film with a 300 ??m dot size was fabricated. The surface morphology, transmittance, surface roughness and water contact angle of the prepared thin films were measured by a field emission scanning electron microscope, an atomic force microscope, a UV-Vis spectrophotometer and a contact angle meter. |
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