Investigation on dielectric properties of iron oxide nanoparticles-embedded binary transition metals-doped polyaniline-m
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Investigation on dielectric properties of iron oxide nanoparticles-embedded binary transition metalsdoped polyaniline-metal hybrid nanocomposites C. Anju1 and Shiny Palatty2,* 1 2
Department of Basic Sciences & Humanities, Rajagiri School of Engineering & Technology, Ernakulam 682039, Kerala, India Department of Chemistry, Bharata Mata College, Ernakulam 682021, Kerala, India
Received: 23 September 2020
ABSTRACT
Accepted: 12 November 2020
Dielectric material based on hybrid PANI-metal nanocomposites always gained an immense research interest due to its unique properties. Herein, we have synthesized iron oxide nanoparticles embedded two different binary transition metal doped PANI nanocomposites via simple in situ rapid mixing chemical oxidative polymerization method. Morphological, structural, electronic and chemical composition of the composites were systematically studied. The influence of dopant concentration in tuning PANI surface from flake like to spherical bead like morphology was analysed by high resolution transmission electron microscopy. Moreover, dielectric parameters as function of frequency have been investigated at room temperature in a frequency range 100Hz–2MHz and the result showed that the as prepared flake like nanocomposites - 0.3 M Cu-Fe-PANI and 0.7 M Mn-Fe-PANI systems are promising dielectric materials.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction The development of polymer based superior dielectric composite materials has of late got huge consideration among modern energy storage devices due to their easy fabrication process, excellent dielectric properties, mechanical stability and high breakdown voltage [1–5]. Among them, high dielectric metal organic complexes made an exceptional benefaction to the electronic industry owing to their strong intermolecular interactions reinforced with long range polaron hopping mechanisms [3]. PANI conducting polymer composites have several beneficial
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https://doi.org/10.1007/s10854-020-04883-6
characteristics like reversible doping–dedoping chemistry, easy synthesis, tunable electrical properties, high electrochemical and thermal stabilities, good pseudocapacitance, and charge storage capacity throughout the entire volume, and developing since the early 1960s, today these are the most intriguing materials for use in energy applications [6–8]. The synergistic effect achieved through incorporating transition metals in the highly conductive matrix of conducting polymers can effectively improve the defects like low dielectric constant values of the polymers, which is still a stringent requirement for their commercialization [9, 10]. With
J Mater Sci: Mater Electron
regard to electrode potentiality of metal ions, covalent or metallic bonding occurs in such architectures via imine, amine or both nitrogen atoms of the PANI matrix, thus facilitating electronic and ionic transport [7, 11]. Although various transition metals like Fe, Cu, Ni, Mn, Co etc. hav
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