β-MnO2 nanorods investigation of dielectric properties for electronic applications

OKUTAN M., Doğan N., Öztürk M., Yalçın O.

Journal of Molecular Structure, vol.1241, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1241
  • Publication Date: 2021
  • Doi Number: 10.1016/j.molstruc.2021.130516
  • Journal Name: Journal of Molecular Structure
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Keywords: beta-MnO2 nanorods, Hydrothermal, Dielectric, Conductivity, Cole-Cole, Smith chart, HYDROTHERMAL SYNTHESIS, AC CONDUCTIVITY, IMPEDANCE, LIMN2O4, NANOCOMPOSITE, SPECTROSCOPY, ABSORPTION, CONSTANT, MODULUS, CATHODE
  • Yıldız Technical University Affiliated: Yes

Abstract

© 2021In 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.