β-MnO2 nanorods investigation of dielectric properties for electronic applications


Okutan M. , Bingölbali N. D. , Öztürk M., Yalçın O.

JOURNAL OF MOLECULAR STRUCTURE, vol.1241, pp.1-8, 2021 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 1241
  • Publication Date: 2021
  • Doi Number: 10.1016/j.molstruc.2021.130516
  • Title of Journal : JOURNAL OF MOLECULAR STRUCTURE
  • Page Numbers: pp.1-8

Abstract

In this study, β−Mn O2 nanorods (NRs) were produced by hydrothermal method to describe the dielec- tric response of electronics and human health monitor applications. The structural properties of synthe- sized β−Mn O2 NRs were identified using X-ray diffraction. Frequency variation of dielectric properties for β−Mn O2 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−Mn O2 NRs were attributed to Kroop’s theory, Maxwell-Wagner approach, viscoelastic mechanism and Brownian motion in the high frequency regime. The complex electric modu- lus based on Cole-Cole plots associated with equivalent RC circuit and their adapted to the Smith-Chart diagram is investigated for β−Mn O2 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 con- ductivity model for β−Mn O2 NRs.