عنوان	Structural, morphological, and optical properties of PVA polymer composites incorporated with various concentrations of GO: linear and nonlinear optoelectronic studies
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	PVA composite; Graphene Oxide; Optoelectronics
چکیده	In the current study graphene oxide (GO) as a novel approach was examined to reduce the optical bandgap of polyvinyl alcohol (PVA). The synthesis of PVA/GO nanocomposite films with varying GO concentrations was conducted using solution cast procedure. The PVA/GO composites were studied by XRD, FTIR and SEM to understand the structural and morphological appearance. A comprehensive optical characterization was performed using UV–Vis spectroscopy. Dispersion parameters were analyzed using the Wemple and DiDomenico (WDD) model, which showed that GO material had a major impact on the films' optical performance. The observed significant variations in the dispersion energy (), the high-frequency dielectric constant (), and the single-effective oscillator energy () are of great interest. Drude's theory was also used to investigate the dielectric characteristics; the results showed variations in the free carrier concentration and lattice dielectric constants (). The investigation also focused on nonlinear optical properties, emphasizing improvements in nonlinear susceptibilities ( and ) and nonlinear refractive indices () at higher concentrations of GO. The findings demonstrate that GO doping efficiently tailors the optical and dielectric properties of PVA-based materials, making them suitable for a variety of optoelectronic applications.
پژوهشگران	سیامند صالح خسرو (نفر اول)، دیاری ممند (نفر دوم)، صلاح رضا سعید (نفر سوم)، عبدالله حسن زاده (نفر چهارم)، امید عبدالله (نفر پنجم)، شجاع الدین عزیز (نفر ششم به بعد)