University of Kashan Journal of Nanostructures 2251-7871 15 1 2025 01 01 Influence of CuO Nanoparticles on the Structural, Optical and Thermal Properties of CMC-PVP Films 239 248 114794 10.22052/JNS.2025.01.023 EN Aws Shukur Hussien Department of Physics, College of Education for Pure Science, University of Tikrit, Iraq Adnan Raad Ahmed Department of Physics, College of Education for Pure Science, University of Tikrit, Iraq Journal Article 2024 09 23 Using the precipitation process, copper oxide nanoparticles (CuO NPs) were created at different calcination temperatures of (400, 600, and 800) °C. Polymeric films (CMC-PVP) incorporating (CuO NPs) were fabricated using the casting method with weight ratios of (3, 5, 7, and 9) %. The film’s thickness measured (45±1) µm. The FE-SEM measurements indicated the copper oxide phase is achieved at (400°C), and as the temperature rises, the crystallinity and particle size both increase at (600°C) and (800°C) calcination temperatures, and their propensity for agglomeration and irregular flake-like morphologies<span class="s1">. </span>The optical and thermal characteristics of films reinforced with CuO nanoparticles demonstrate their influence on optical transmittance over the (200-1100) nm wavelength range, alongside a decrease in energy band gap values from 4.90 eV to 4.35 eV and an increase in thermal conductivity (K) of the prepared films with escalating reinforcement ratios. https://jns.kashanu.ac.ir/article_114794_b2f8af8eac7f0ea72a3057482f02ffb6.pdf