High optical transmittance of nanostructured TiO2 thin film using dip coating method

Titanium dioxide (TiO
₂
) is an universal oxide material used in many applications such as optical sensing. TiO2 thin films have been investigated under various molarities concentration by dip coating technique. The characterization of the thin films at different molarities of concentrations were varied at 0.01M, 0.05M, 0.10M and 0.50M by Ultraviolet Visible Spectrometer (UV-VIS), Field Emission Scanning Electron Microscopy (FESEM), Atomic Force Microscopy (AFM) and Surface Profiler (SP). From this study, the optical sensing response depends on different concentrations of solution. The optical transmittance was in the range of 35.32% of 0.01M and 21.38% of 0.50M. The optical transmittance was found that increased as the molarities concentration decreased. The surface structural and the surface roughness of the thin films are also discussed.