Synthesis and Ameliorating the Morphological, Structural and Linear/Nonlinear Optical Features of PVA/SnO2-SiC Nanostructures for Optoelectronics and Radiation Shielding Applications
نویسندگان
1 Department of Physics, College of Education for Pure Sciences, University of Babylon, Iraq
2 Department of Physics, College of Education for Pure Sciences, University of Babylon, Iraq
doi
10.22052/JNS.2025.04.078چکیده
Owing to their potent antibacterial properties and nanoscale dimensions, nanoparticles have emerged as a viable alternative for various medical and technological applications. This research involved fabricating polymer nanocomposite samples via the solution casting method. The test samples used polyvinyl alcohol (PVA) polymer as the host matrix. Different concentrations of tin dioxide (SnO2) and silicon carbide (SiC) nanoparticles were introduced into the samples at various weight ratios (0%, 2%, 4%, 6%, and 8%) wt.%. The (PVA/SnO2-SiC) nanostructures demonstrate exceptional characteristics, including cost-effectiveness, advantageous optical properties, and reduced weight relative to other nanosystems. This study investigated the structural, optical (linear/nonlinear), morphological and radiation attenuation properties of the (PVA/SnO2-SiC) nanostructures. It was discovered that polyvinyl alcohol (PVA) is amorphous, and with the increase of (SnO2-SiC) nanoparticles in the polymer samples, the rate of crystallite increases through (XRD). The microstructure of the materials was characterized, and the elements of the (SnO2-SiC) nanoparticles were detected through (EDS). Optical microscope pictures revealed that the nanoparticle dispersion within the mixture had a homogenous pattern, creating a coherent network throughout the polymer matrix. The experimental findings on the optical characteristics of (PVA/SnO2-SiC) nanocomposites indicated that the recorded absorption values, absorption coefficient (α), extinction coefficient (k), refractive index (n), real (ε1) and imaginary (ε2) dielectric constants, and optical conductivity (σop), dispersion factors, nonlinear refractive index (n2), linear susceptibility (χ(1)), Urbach tail energy (Eu), nonlinear susceptibility (χ(3)), average oscillator coefficient (λ0), n0, which stands for zero-frequency refractive index, and ε0, which stands for zero-frequency dielectric constant of pure polyvinyl alcohol (PVA) increased with higher concentrations of (SnO2-SiC) nanoparticles.
