Oxidation state, local structure distortion, and defect structure analysis of Cu doped α-MnO2 correlated to conductivity and dielectric properties
Erna Hastuti, Achmad Subhan, Penphitcha Amonpattaratkit, Mochamad Zainuri, T. Triwikantoro, S. Suasmoro
Abstract
A C T Cu-doped MnO 2 with the composition of Mn 1-x Cu x O 2 (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 -MnO 2 type structures performing (2 2) and
Topics & Concepts
X-ray absorption spectroscopyOxidation stateDopantAnalytical Chemistry (journal)Materials scienceOctahedronDielectricManganeseConductivityElectrical resistivity and conductivityDielectric spectroscopyNanorodDopingAbsorption spectroscopyIonic conductivityCrystallographyCrystal structureChemistryPhysical chemistryMetalElectrochemistryNanotechnologyElectrodeMetallurgyEngineeringChromatographyElectrical engineeringPhysicsElectrolyteOptoelectronicsQuantum mechanicsSupercapacitor Materials and FabricationConducting polymers and applicationsZnO doping and properties