Anatase TiO2 films crystallized on SnO2:F substrates in an aqueous solution

Anatase TiO2 films were fabricated on SnO2:F substrates in an aqueous solution. The films were constructed of assemblies of nano-TiO2. Surface of the films showed large roughness due to nano/micro-asperity of the assemblies. The thickness was increased to 260 nm, 360 nm, 600 nm and 760 nm with the deposition time of 2 h, 5 h, 25 h and 48 h, respectively. The films showed strong intensity of 004 X-ray diffraction possibly because the needles, i.e., nano-TiO2, elongated along the c-axis. Low-temperature synthesis of crystalline anatase TiO2 films has a great deal of potential in the development of electronic devices, optical devices, dye-sensitized solar cells, photocatalytic devices and biomolecule sensors.