Investigation of structural and electrical properties of novel CuO–PVA nanocomposite films

Abstract

The objective of this study was to investigate the effects of CuO nanoparticles on the structural, thermal and electrical properties of polyvinyl alcohol (PVA) thin films. The thin films were prepared by a solution casting technique with different weight percentages viz., 0.5, 1.0, 1.5 and 2.0 wt% of CuO nanoparticles in PVA matrix. The fabricated nanocomposite thin films were structurally characterised by Fourier transform infrared spectroscopy and X-ray diffraction, while differential scanning calorimetry indicated the effect of CuO nanoparticles on thermal properties of PVA. The surface morphology of the films was determined by scanning electron microscopy technique. Dielectric properties were analysed using high frequency LCR metre and were found to be dependent on frequency and CuO concentration. Dielectric constant decreased with increase in both frequency and CuO concentration. Dielectric loss increased with frequency increase and decreased with increase in CuO concentration. AC conductivity increased with increase in frequency. PVA-2.0 wt% CuO nanocomposite was found to possess desirable properties such as low dielectric constant and low dielectric loss which makes it a desirable material for use in microelectronics industry.

Anomalous behavior of the dielectric and electrical properties of polymeric nanodielectric poly(vinyl alcohol)–titanium dioxide films

“…The XRD pattern of the pure PVA film exhibited a broad but intense diffraction peak at 2θ = 19.59°; this corresponded to concurrent crystal reflections 101 and . This was in agreement with earlier results . Furthermore, the broad and intense characteristic of the peak revealed that the PVA matrix exhibited a semicrystalline structure with a predominantly amorphous phase.…”

“…Furthermore, the broad and intense characteristic of the peak revealed that the PVA matrix exhibited a semicrystalline structure with a predominantly amorphous phase. The crystalline phase in the pristine PVA matrix was formed because of intermolecular hydrogen bonding between the hydroxyl groups of the neighboring PVA chains . When 1, 3, and 5 wt % TiO 2 amounts were dispersed in the PVA matrix, these TiO 2 nanoparticles resulted in a small change in the PVA 2θ but a large decrease in the intensity value of the PVA peak.…”

“…PVA is a hydrophilic, nontoxic, and biocompatible polymer, and it is completely soluble in hot water. The aqueous solution‐cast film of PVA has a high optical transparency, good chemical resistance, and electrically insulating characteristics; these properties have established it as the most suitable binder, substrate, and insulator for the fabrication of various electronic devices and sensors and also for chemical engineering processes and pharmaceutical and biomedical applications . With respect to various kinds of inorganic nanoparticles, TiO 2 has gained more attention because of its low toxicity, excellent transparency for visible light, UV absorbance, and high chemical stability .…”

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

“…The alternating conductivity s ac of the sample results from the charge carrier's motion during it is evaluated by the equation [63][64][65].…”

Influence of cadmium sulfide nanoparticles on structural and electrical properties of polyvinyl alcohol films

“…In most of these cases, the nano -composites were further used in various applications in their thin-film form [1]. Composite materials consisting of metal nanoparticles embedded in transparent host matrix have attracted the attention of researchers as advanced technological materials for use in solar cells for photoelectric conversion, transistors for electronic switches [2][3][4][5][6] because of their unique optical, electronic [7], mechanical [8] and structural [9] properties. Large interfacial area between the nanofiller and polymer matrix is a key advantage of nanocomposites since the nanomaterials have high aspect ratio and high surface area.…”