Preparation and Characterization of Nanocrystalline TiO2 Thin Films Prepared By Sol-Gel Spin Coating Method

Titanium dioxide(TiO 2 )thin films were synthesized via sol-gel spin coating method using titanium tetra isopropoxide (TTIP) as starting material.TTIP is dissolved in ethanol stabilized by glacial acetic acid.TiO 2 thin films were prepared for different proportions of acetic acid.The prepared samples were dried at 250°C for 5minutes then annealed at 500°C for 1hr.The structural properties were investigated by using X-ray diffraction technique and grain size was calculated.Elemental analysis and surface morphology were studied using EDX spectrum and SEM micrograph.Absorbance spectra were measured by using UV-Vis spectrophotometer and the optical band gap was calculated.The crystalline size of TiO 2 thin films obtained is ~19.67nm.