Influence of MnO2 Nanoparticles Addition on Structural, Optical and Dielectric Characteristics of PVA/PVP for Pressure Sensors
DOI:
https://doi.org/10.15330/pcss.23.2.353-360Keywords:
MnO2, pressure sensors, energy gap, dielectric constant, conductivityAbstract
Films of PVA/PVP/MnO2 nanostructures were fabricated for pressure sensors fields with lightweight, flexible and low cost compare with other sensors. The structure, dielectric and optical characteristics of PVA/PVP/MnO2 nanostructures have been studied. The results showed that the dielectric constant, dielectric loss and A.C electrical conductivity of PVA/PVP blend are enhanced with the increase in MnO2 NPs content. The dielectric constant and dielectric loss decrease while the A.C electrical conductivity increases with the increase in frequency. The optical characteristics of PVA/PVP/MnO2 nanostructures showed that the absorbance was rise with increasing of the MnO2 NPs content. The indirect energy gap of PVA/PVP blend was reduced with increase in MnO2 NPs content. The optical constants of blend are changed with the increase in MnO2 NPs content. The pressure sensor application results of PVA/PVP/MnO2 nanostructures showed that the electrical capacitance (Cp) increases with the rise in applied pressure.
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