FT-IR spectrum confirms the presence of carbonyl and hydroxyl groups in the molecular structure of anthocyanin dye which can be bound with the surface of TiO2 porous film. Fig. 4 shows the SEM
image of thin film of TiO2 nanoparticles fabricated using the doctor-blade technique. The TiO2 nanoparticles had an average particle size of approximately 20 nm.