title: Growth behavior of titanium dioxide thin films at different precursor temperatures.
abstract: The hydrophilic TiO2 films were successfully deposited on slide glass substrates using titanium tetraisopropoxide as a single precursor without carriers or bubbling gases by a metal-organic chemical vapor deposition method. The TiO2 films were employed by scanning electron microscopy, Fourier transform infrared spectrometry, UV-Visible [UV-Vis] spectroscopy, X-ray diffraction, contact angle measurement, and atomic force microscopy. The temperature of the substrate was 500°C, and the temperatures of the precursor were kept at 75°C (sample A) and 60°C (sample B) during the TiO2 film growth. The TiO2 films were characterized by contact angle measurement and UV-Vis spectroscopy. Sample B has a very low contact angle of almost zero due to a superhydrophilic TiO2 surface, and transmittance is 76.85% at the range of 400 to 700 nm, so this condition is very optimal for hydrophilic TiO2 film deposition. However, when the temperature of the precursor is lower than 50°C or higher than 75°C, TiO2 could not be deposited on the substrate and a cloudy TiO2 film was formed due to the increase of surface roughness, respectively.
authors.affiliation: Department of Chemistry and Institute of Basic Science, Sungkyunkwan University, Suwon, 440-746, South Korea. askaever@skku.edu.
authors.forename: Sang-Hun
authors.initials: SH
authors.lastname: Nam
authors.forename: Sang-Jin
authors.initials: SJ
authors.lastname: Cho
authors.forename: Jin-Hyo
authors.initials: JH
authors.lastname: Boo