Dielectric, AС Conductivity and Optical Characterizations of (PVA-PEG) Doped SrO Hybrid Nanocomposites

Abstract

Strontium Oxide (SrO) nanoparticles have a specific structure, and excellent optical, mechanical, and thermal properties, within direct bandgap semiconductors applications. SrO impact on the optical and electrical properties of newly (PVA-PEG/ SrO) nanocomposite were investigated. The electrical properties were measured at 100 Hz – 6 MHz frequencies. An increase in frequency caused a reduction in the dielectric loss (δ) and dielectric constant (ɛ). ɛ value revealed an improvement with an increased loading ratio of SrO. The optical properties of the (PVA-PEG/SrO) nanocomposite showed a reduction in the energy gap values. In contrast, the absorption, extinction coefficient, absorption coefficient, optical conductivity, refractive index, and dielectric constant (imaginary, real) increased with the increased concentration of SrO NPs.

Examination the antibacterial activity for the TiO2 nanoparticles which is prepared by hydrothermal method and mixed with plant and animal extracts (Onion peels and Chitosan peels)

“…As the number of Ni2O3 NPs goes up, as shown in the figure ,so the dielectric constant of NCs increases. This behavior can be explained by the polarization of the interfaces between the NCs when an alternating electric field is applied and the rise in charge carriers [21]. Figure 11 shows that as the frequency goes up, the space charge polarization as a percentage of the total polarization goes down.…”

Effect of Loading Corn Starch Nanoparticles on the Morphological, Optical, and Dielectric Behaviors of PVA/PMMA/PAAm Polymer Blend for Optoelectronic and Antibacterial Applications

“…A linear relationship between (αhν) 2 and hν indicates that starch has a direct energy band gap. The optical absorption edge was analyzed by the Tauc relationship [39]: where B is constant, n values are 1/2 and 2 for direct and indirect allowed transitions, respectively. We can see that as the weight percentages of CSNPs increase, the values of the energy gap decrease.…”