Study the Thermal, Electrical, and Optical Properties for Nano Composite of PVA/PVP Blend Incorporated by Gold and Silver Nanoparticles via Laser Ablation
نویسندگان
1 Department of Physics, College of Science, University of Diyala, Diyala, Iraq
2 Department of Physics, College of Science, University of Diyala, Diyala, Iraq
3 Department of Physics, College of Science, University of Diyala, Diyala, Iraq
4 Ministry of Higher Education and Scientific Research Al Iraqia University, Iraq
5 Department of Physics, College of Science, University of Diyala, Diyala, Iraq
doi
10.22052/JNS.2026.03.033چکیده
This analytical study of the functional properties of a PVA/PVP polymer blend incorporated with gold (Au) and silver (Ag) nanoparticles prepared via laser ablation technique revealed significant quantitative improvements in thermal, electrical, and optical properties. Thermally, thermal conductivity measurements showed a clear increase in samples containing nanoparticles. Sample silver with polymer blend (AgNPs/(PVA/PVP)) recorded the highest value of approximately 1.25×10-2 W/m·oK compared to the Sample pure polymer blend (PVA/PVP), which had a value of about 7.5×10-3 W/m·oK. Electrically, the results showed a substantial increase in the dielectric constant of the composite samples (Au, Ag and Au/Ag NPs with PVA/PVP polymer blend) at low frequencies. The electrical conductivity of the composite samples with polymer blend also increased with increased the applied field frequency, exceeding 2.4×10-4 S/m at high frequencies (5×106 Hz) for sample Au/AgNPs/(PVA/PVP) and jumped from approximately 0.85×10-4 S/m for the pure polymer blend to about 2.5×10-4 S/m for sample AuNPs/(PVA/PVP, while it remained low for the pure sample. Optically, the optical transmittance of the composite samples decreased sharply in the visible region, dropping from about 90% for the pure sample to less than 10% at wavelengths around 240-340 nm for all samples. The absorption spectrum also showed a distinct absorption peak around 429 nm, indicating surface plasmon resonance. Furthermore, optical energy gap calculations showed a decrease from about 5.25 eV for the pure sample to approximately 4.5 eV for sample AgNPs/(PVA/PVP) and 4.95 eV for sample Au/AgNPs/(PVA/PVPSuch actual quantitative enhancements unequivocally illustrate the success of the laser process for producing advanced polymeric nanocomposites with enhanced capabilities, making them perfect candidates for use in flexible electronics, optical devices, and energy storage systems. Physical characteristics, PVA/PVP blend, Laser ablation technology, Gold and silver Nanoparticles, Nanocomposite films.
