Doping-induced dielectric and transport properties of Ni1−xZnxO

Giri, N.; Mondal, A.; Sarkar, Samrat; Ray, Rajat

doi:10.1007/s10854-020-03813-w

Cited by 4 publications

(1 citation statement)

References 55 publications

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“…The dielectric loss, otherwise referred to as tangent loss is a statistical measure of how much field is dissipated as heat in the process of polarization of a material by an applied field. The dielectric loss certainly decreases with frequency, and at higher frequencies, the loss angle is approximately the same because at higher frequency range nanoparticles expose a dispersive nature generated by multiple polarization effects [60]. In polar dielectrics, the orientations of molecules along the path of the applied electric field necessitate the utilization of sufficient electric energy to counteract the forces of internal friction.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Revealing the Substitution of Zn2+ on Nano-Structural, Magneto-Electrical, Antibacterial and Antifungal Attributes of Nickel Oxide Nanoparticles via Sol-Gel Strategy

Aslinjensipriya¹,

R²,

Ragu³

et al. 2022

Preprint

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Transition metal oxides have gathered momentum among the scientific community on account of their peculiar procession in physico-chemical, opto-electronic, magnetic, electrochemical, and biological attributes resulting from anisotropic charge distribution of partly filled d-orbitals, non-stoichiometric behaviour, and diverse oxidation states of the cations. The current work emphasize on the systematic synthesis and characterization of pure and zinc (Zn) incorporated nickel oxide (NiO) nanoparticles in varying concentrations ZnxNi1−xO (x = 0, 0.1, 0.2, and 0.3) via a scalable sol-gel approach assisting citric acid (C6H8O7) as a congealing factor. A series of extensive analyses were executed to investigate the structural, opto-electrical, and magnetic characteristics of prepared nanoparticles. X-Ray Diffraction (XRD) studies confirmed the face-centered cubic structure of as-synthesized samples and the corresponding crystallite size is found to decrease with an increasing dopant concentration as estimated from the Scherrer method. Scanning electron microscopy studies portrayed the spherical structure and porous nature of NiO nanoparticles. Particle size calculated from SEM shows the decreasing trend with dopant discrepancy which is in accordance with crystallite size measured from XRD results. Energy Dispersive X-ray (EDX) spectra revealed the presence of estimated molecular assembly in synthesized samples. The cubic configuration and the presence of functional groups existing in synthesized nanoparticles were endorsed from Fourier Transform Infra-Red (FTIR) spectra. The optical absorption spectrum examined from UltraViolet-visible (UV-vis) spectroscopy evaluates the energy bandgap and it is noticed to increase from 2.48 to 2.87 eV affirming the Burstein Moss shift. The energy dispersion of optical parameters plays a crucial contribution in optical materials pursuant to its prominence in optical communications and in fabricating novel devices for spectral dispersion. Optical and energy dispersion parameters evaluated from Wemple-DiDomenico (WDD) model and non-linear optical parameters were deliberated from optical studies. Urbach energy and another pivotal optical criterion highly correlated with the bandgap energy anchored in the fabrication of optoelectronic devices were assessed. The electrical characteristics such as dielectric constant, loss, and conductivity exhibited by pure and Zn doped nickel oxide nanoparticles were reported. Molecular electronic polarizability assessed through elementary solid-state parameters is in better concurrence with diverse relations like Clausius-Mossotti, Lorentz-Lorent, bulk modulus, optical electronegativity, energy band gap. The pore size distribution of substance matrix and the associated surface area were elucidated from Brunauer-Emmett-Teller (BET) analysis. Dispersive magnetic properties and two pivotal parameters were derived from the Law of Approach to Saturation (LAS) operandi. Further, microbial cell mechanism was illustrated through nano-architecture design, and the antibacterial and antifungal activity encountered by undoped and zinc doped NiO nanoparticles against different microbial strains were deeply discussed for pilot production of antimicrobial agents.

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Section: Dielectric Studiesmentioning

confidence: 99%

Revealing the Substitution of Zn2+ on Nano-Structural, Magneto-Electrical, Antibacterial and Antifungal Attributes of Nickel Oxide Nanoparticles via Sol-Gel Strategy

Aslinjensipriya¹,

R²,

Ragu³

et al. 2022

Preprint

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Emergence of Dielectric Properties by Doping of Semi‐Transition Metal in Semiconductor Complex Perovskite Oxide

Shankar

Prajapati

Verma

et al. 2023

Cryst. Res. Technol.

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The effect of zinc substitution at the Cu 2+ site and germanium substitution at the Ti 4+ site in bismuth copper titanate, Bi 2/3 Cu 3 Ti 4 O 12 , is investigated. Composition with x = 0.05 is synthesized by semi-wet route in the system Bi 2/3 Cu 3 Ti 4−x Ge x O 12 (BCTGO) and Bi 2/3 Cu 3−x Zn x Ti 4−x Ge x O 12 (BCZTGO) that are sintered at 1123 K for 8 h. Crystal structure has remained cubic. The phase formations of these ceramics are confirmed by the X-ray diffraction. The microstructural analysis of the samples is done by scanning electron microscopy and tunneling electron microscopy. Elemental analysis is performed by energy dispersive X-ray spectroscopy. X-ray photoelectron spectroscopy suggests that all elements present in these ceramics are in proper oxidation states. The dielectric constant is found high for BCTGO-0.05 ceramic. The specific capacitances of BCTGO-0.05 and BCZTGO-0.05 are found to be 13.05 and 15.7 F g −1 , respectively. Optical band gap values (E g ) of BCTGO-0.05 and BCZTGO-0.05 ceramics are found as 1.77 and 1.91 eV.

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Manipulating dielectric relaxation via anisotropic field deviations in perovskite titanate grain–grain boundary heterostructure: a joint experimental and theoretical venture

et al. 2022

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Doping-induced dielectric and transport properties of Ni1−xZnxO

Cited by 4 publications

References 55 publications

Revealing the Substitution of Zn2+ on Nano-Structural, Magneto-Electrical, Antibacterial and Antifungal Attributes of Nickel Oxide Nanoparticles via Sol-Gel Strategy

Revealing the Substitution of Zn2+ on Nano-Structural, Magneto-Electrical, Antibacterial and Antifungal Attributes of Nickel Oxide Nanoparticles via Sol-Gel Strategy

Emergence of Dielectric Properties by Doping of Semi‐Transition Metal in Semiconductor Complex Perovskite Oxide

Manipulating dielectric relaxation via anisotropic field deviations in perovskite titanate grain–grain boundary heterostructure: a joint experimental and theoretical venture

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