Characterization, Optical and Conductivity Study of Nickel Oxide Based Nanocomposites of Polystyrene

Different concentrations of nickel oxide (NiO) nanoparticles were successfully inserted into polystyrene (PS) polymer matrix using the solution casting method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), High-resolution scanning electron microscope (HRSEM), and UV-Vis techniques are used to characterize the nanocomposites. XRD, HRSEM, and FT-IR results indicate that PS and NiO nanoparticles have a good interaction and a high degree of complexity. Using UV-Vis technique, the absorbance of nanocomposites is improved by increasing the nanofiller content. Both the Urbach energy (EU) and the optical energy gap (Eg) were calculated using the Urbach relation and the Tauc model. Refractive indices values of nanocomposites display raising trend with NiO content which promote PS/NiO nanocomposites for use in photonic applications and designing optical devices. Electrical conductivity of nanocomposites were also investigated. The electrical conductivity of the nanocomposites has increased significantly due to the uniform dispersion of NiO nanoparticles and by increasing its content. Conduction is achieved by correlated barrier hopping (CBH).

Automated summary

In this study, different concentrations of nickel oxide (NiO) nanoparticles were successfully incorporated into a polystyrene (PS) polymer matrix using the solution casting method. Various characterization techniques were used to analyze the nanocomposites, revealing a strong interaction between PS and NiO nanoparticles. Increasing the nanofiller content improved the absorbance of the nanocomposites and raised the refractive index values, indicating potential applications in photonic devices and optical design. Moreover, the electrical conductivity of the nanocomposites was significantly enhanced due to the uniform dispersion of NiO nanoparticles and increasing content, achieving conduction through correlated barrier hopping (CBH).