Abstract
Recent research aims to study the structural, optical, mechanical, and dielectric characteristics of polyvinyl alcohol (PVA) filled with Cu2+/Zn2+ doped-PVA polymeric composite films. Cu2+/Zn2+/PVA films were prepared by the solution casting method and examined by different techniques such as XRD, UV-Vis, tensile testing, and dielectric measurements. PVA's crystallinity is affected by the interaction of the PVA's main chain and metal ions doping. The Cu2+-ions codoped Zn/PVA composite films reveal the absorbance spectrums in the visible region due to the surface plasmonic resonance (SPR) phenomenon for Cu-particles. It is found that the mechanical characteristics were improved, where the strength, Young's modulus, and ductility were increased through the increase of Cu2+-ions content in Zn/PVA composite films. The dielectric measurement of the as-prepared polymeric composite films has investigated and demonstrated a highly attractive dielectric constant for the polymeric dielectric media. The obtained dielectric behaviors, alternating-current conductivity, and dielectric modulus depended on the Cu2+-ions content. The power output is reduced by increasing Cu2+-ions content, and therefore, the optical limiting of polymeric films becomes better. Finally, Cu2+-ions doped Zn/PVA composite films showed unique properties to be used as flexible electronic and optoelectronic devices, especially in dielectric media, CUT-OFF laser filters for biomedical laser applications.
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