عنوان مقاله [English]
Today, tungsten oxide is widely used in various medical and industrial applications. Polyethylene glycol can be used as a suitable agent to control the properties of nanoparticles. Therefore, in this paper, the effect of different concentrations of polyethylene glycol on synthesized tungsten oxide nanostructures using sol-gel method is investigated. The results confirm that the pegylation significantly affect the optical and structural properties of tungsten oxide nanostructures. The results of XRD analysis show that pegylation reduces the crystalline quality of this nanostructure and the crystalline structure changes from single-phase (orthorombic) to multi-phase. Morphological investigations declare that pegylation of tungsten oxide with lower concentrations of polyethylene glycol results in smaller particles than the non-polygylated structure of WO3, while larger plates appear at higher concentrations of polyethylene glycol. Also, optical analysis shows that pegilation increases the light reflection of nanostructures. Furthermore, blue shift of absorption edge and energy bandgap occurs by pegylation of tungsten oxide nanostructures. Also, characteristic tungsten oxide peaks are observed in the FTIR spectra of all polygylated and non-polygylated structure of WO3.