Abstract: A TiO2 reverse micelle solution was prepared by mixing water-Triton X-100-cyclohexane reverse micelle with a mixture of titanium isobutoxide and isopentanol, and then three TiO2 films supported on glass have been made by dip-coating in the reverse micelle solution under different performance. Film A was dipped once immediately in the as-prepared reverse micelle solution, film B was dipped ten times in the as-prepared reverse solution, film C was dipped in the reverse micelle solution which had been aged six hours. The morphology of the films was studied by XRD, SEM, and AFM. The results showed that on the film A TiO2 nanometer particles distributed homogenously, but on film B and C the nano-particles were aggregated in different fashions, and formed second particles like island, the surface roughness of the film surface increased obviously, especially film C was the most rough one. According to the fractal geometry analysis, all films surface structural morphology has properties of fractal structural morphology with estimated dimension 2.22, 2.20, and 2.34, respectively.

Key words: TiO₂ porous films, Surface structural morphology, Atomic force microscope