Multifunctional Applications of a Novel Ru-Metal Mixed PVAL Flexible Composite for Limiting Absorption and Varistor: Syn
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Multifunctional Applications of a Novel Ru‑Metal Mixed PVAL Flexible Composite for Limiting Absorption and Varistor: Synthesis, Optical, and Electrical Characterization H. Elhosiny Ali1,2,3 · M. M. Abdel‑Aziz1,4 · H. Algarni1 · I. S. Yahia1,3,5 · Yasmin Khairy2 Received: 19 August 2020 / Accepted: 11 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Composite films with vital multifunctional properties for optoelectronic and varistor applications were prepared via casting procedures. Herein, the present novel composites are based on semi-crystalline polyvinyl alcohol, PVAL, mixed with different contents of Ruthenium-metal. The structure of the films has been fully identified through Fourier Transform (FT-IR), diffraction analysis of X-ray (XRD), and microscopy of scanning electron (SEM). They confirm significant interactions between Ru-metal and PVAL, which leads to a decrease in polymer crystallinity. Ru-metal’s impact on the optical performance has been studied using spectroscopy of UV–Vis–NIR, whereas the applicability of these films for varistor devices was investigated by measuring the electrical conductivity and I–V curves. The crystallite length (D), the spacing of interplanar (d), dislocation density (δ), internal strain (ε), and separation of interchain (R) parameters were calculated from the measurement of XRD. The active absorption band in FTIR spectra shows a significant interaction of Ru-metal with the PVAL via OH groups. The cluster of metal on the composite surface increases with the doping concentration, as illustrated via SEM. Optical bandgaps (Egi & Egd) are estimated from Tauc and absorption fitting (ASF) are nearly equal and reduced with ruthenium addition. Limiting optical absorption (LOA) performance tested using two laser sources showing the reduction of optical transmission via high doping concentration films. With rising Ru-metal content and frequency, the dielectric and AC conductivity tends to be enhanced. Also, the I-V characteristic was improved, and the conductivity follows the fitting of Jonscher. The collected result reflects the consideration of flexible Ru/PVAL as a promising polymeric film in varistor, micro-optics, optical fibers, and CUT-OFF laser applications. Keywords Ru-metal doped PVAL film · XRD analysis · Gaussian fitting · FT-IR spectroscopy · SEM · EDX · Limiting optical absorption · Electrical performance
1 Introduction * Yasmin Khairy [email protected]; [email protected] 1
Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
2
Physics Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
3
Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
4
Department of Physics, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
5
Nanoscience Laboratory for Environmental and Biomedical Applications (NLEBA), Se
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