β-MnO₂ nanorods investigation of dielectric properties for electronic applications

In this study, β−MnO₂ nanorods (NRs) were produced by hydrothermal method to describe the dielectric response of electronics and human health monitor applications. The structural properties of synthesized β−MnO₂ NRs were identified using X-ray diffraction. Frequency variation of dielectric properties for β−MnO₂ NRs was characterized by impedance spectroscopy technique. The frequency evolution of the dielectric properties for sample is associated with electrode polarization in the low frequency region. Transmission properties of β−MnO₂ NRs were attributed to Kroop's theory, Maxwell-Wagner approach, viscoelastic mechanism and Brownian motion in the high frequency regime. The complex electric modulus based on Cole-Cole plots associated with equivalent RC circuit and their adapted to the Smith-Chart diagram is investigated for β−MnO₂ NRs in detail. Absorption coefficient (α) and relaxation times (τ) values for the sample were recorded 0.21 and 5.1766 × 10⁻⁵ in succession. Frequency exponent (s), which is a characteristic of conductivity, was found to be compatible with the Correlated Barrier Hoping conductivity model for β−MnO₂ NRs.