Oxidation state, local structure distortion, and defect structure analysis of Cu doped α-MnO₂ correlated to conductivity and dielectric properties.

ABSTRACT: Cu-doped MnO₂ with the composition of Mn_1-xCu_xO₂ (x = 0-0.15) was synthesized and characterized. The synthesis was carried out by hydrothermal method at 140 °C for 5 h of reaction dwell time. The characterizations include X-Ray Diffraction (XRD), Microscopy, X-ray Absorption Spectroscopy (XAS), and Impedance complex analysis. It was revealed that all samples have nanorod morphology. Their size increases with the increasing dopant. Additionally, K ions are detected by EDX. All samples pose α-MnO₂ type structures performing (2 × 2) and (1 × 1) tunnels permitting large ions incorporated and oxygen deficiency. The octahedron was distorted to elongate up to x = 0.10, then compressed for x = 0.15, inducing the Jan Teller effect. Oxidation st

SUBMITTER: Hastuti E 

PROVIDER: S-EPMC9660732 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature