Preparation and multifaceted characterization and optoelectronic potential of Cu/CuO/Cu₂O nanoplates in a PVC/PE matrix

In this study, we thoroughly investigate the physicochemical properties of Cu/CuO/Cu₂O nanoplates synthesized in distinct plate-like structures. These nanoplates were incorporated into a polymer matrix (PVC/PE) at varying concentrations (0, 1, 2, and 3%). Employing various analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), optical absorption, and alternating current (AC) conductivity measurements, we unravel the structural, morphological, molecular, optical, and electrical characteristics of these nanostructures. The results showcase the potential of these nanocomposites for optoelectronic device applications by exhibiting tunable optical bandgaps and frequency-dependent dielectric properties. In particular, the observed redshift in the absorption spectrum and modulation of the direct bandgap with increasing nanoplate content underscores their application in spectral selectivity and light harvesting. Furthermore, the transition from insulating to conducting behavior upon percolation signifies their utility in transparent conductive coatings. This study provides fundamental insights into the structure–property relationships of Cu/CuO/Cu₂O nanoplate polymer nanocomposites for tailored optoelectronic applications.