Collection of scientific works Nanosystems, nanomaterials, nanotechnologies Year 2023 Volume 21, Issue 4
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Shaimaa Mazhar Mahdi and Majeed Ali Habeeb
Fabrication of Novel PEO–PVA/SrTiO3–CoO Nanostructures for Low-Cost Pressure Sensor and Gamma-Ray Shielding
803–816 (2023)

PACS numbers: 07.07.Df, 68.37.Hk, 77.84.Lf, 78.20.Ci, 81.05.Qk, 81.07.Pr, 82.35.Np

Nanocomposites (NCs) are used usually for different fields in an industrial application, which require minimal cost and weight. In this study, strontium–titanium trioxide (SrTiO3)/cobalt oxide (CoO) nanoparticles (NPs) are combined with polyethylene oxide (PEO)/polyvinyl alcohol (PVA) polymer blend to create NCs. The films are made using the casting process, and different weight percentages of SrTiO3/CoO NPs (of 0, 1, 2, 3 and 4 wt.%) are added to the polymer mixture. Scanning electron microscopy shows the surfaces of the PEO/PVA/SrTiO3/CoO NCs films with several randomly distributed aggregates or fragments on the top surface consistently and coherently. Images of optical microscope demonstrate that the blends’ additive distribution of NPs is homogeneous, and SrTiO3/CoO NPs form a continuous network inside the PEO/PVA blend at a concentration of 4 wt.%. The pressure-sensor application results with PEO/PVA/SrTiO3/CoO NCs show that the electrical capacitance (Cp) increases with rise in applied pressure; this behaviour make it suitable for many electronic and electrical applications. In addition, the NCs with high linear attenuation coefficients have gamma-ray source Cs-137. It is also used to protect against radiation. As the concentration of SrTiO3/CoO NPs increases, the transmissive radiation decreases and the attenuation coefficients increase. The results indicate that the PEO/PVA/SrTiO3/CoO NCs can be considered as excellent materials for pressure sensors and gamma-ray shielding.

Key words: nanocomposites, SrTiO3/CoO nanoparticles, pressure sensors, gamma-ray shielding.

https://doi.org/

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