فهرست نشریات علمی دسترسی آزاد ایران

Thin films were successfully prepared from a liquid composite of polyvinyl alcohol (PVA), polyethylene glycol (PEG), and a mixture of PVA/PEG using the spin-coating technique, resulting in a uniform film thickness of approximately 132 nm. The structural properties were analyzed using X-ray diffraction (XRD), and the results indicated that the doping process contributed to a notable increase in grain size (G/S) along with a corresponding decrease in the full width at half maximum (FWHM), as expected due to their inverse relationship. Additionally, Miller indices and inter-planar distances were calculated to further understand the crystal structure. Surface morphology analysis revealed that the doping process led to the formation of homogeneous films with a significant number of pores or holes, suggesting their potential suitability for gas sensing applications. Furthermore, optical characterization showed an enhancement in absorbance, accompanied by a reduction in both transmittance and optical bandgap values, further supporting their utility in optoelectronic and sensing devices.