Structural and electrical properties of sol–gel grown (1 − x) (ZnO) + (x) (SnO2) (x = 0, 0.25, 0.5) nanocomposites

Zankat, Alpa; Gadani, Keval; Rajyaguru, Bhargav; Shrimali, V.G.; Joseph, Joyce; Makwana, Harshida; Trivedi, Rashmi; Solanki, P.S.; Shah, N.A.; Pandya, D.D.

doi:10.1007/s10971-021-05544-8

Cited by 7 publications

(3 citation statements)

References 57 publications

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“…44 In the case of nanomaterials the addition of smaller-sized NiO nanoparticles within the matrix of larger-sized ZnO nanoparticles supports the interfacial polarization and the dielectric constant should be raised. 45 This study leads to the conclusion that adding NiO nanoparticles to the ZnO nanostructured matrix enhances the number of defects, oxygen vacancies, and structural disorders. Consequently, charge carrier density increases and leakage occurs when making any electrical tests.…”

Section: Resultsmentioning

confidence: 91%

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Vala,

Pashvan,

Solanki

et al. 2023

ECS J. Solid State Sci. Technol.

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We present the environment-friendly facile production of ZnO nanoparticles and ZnO: NiO nanocomposites by a completely green synthesis method using Phyllanthus emblica fruit extract as solvent as well as reducing agent. The existence of ZnO and NiO phases in the nanocomposites is confirmed by XRD analysis. Rietveld Refinement was performed to calculate the corresponding structural parameters. The average crystallite size is found in between 18 nm to 22 nm for the different phases present in all the samples. The microstructures of ZnO nanoparticles and ZnO:NiO nanocomposites were investigated by FE-SEM, displaying mixed morphology having a combination of quasi-spherical and hexagonal shape and the particle size varying from 20 nm to 120 nm. The existence of vibrational modes corresponding to ZnO and NiO phases is shown by Raman spectroscopy. Dielectric characteristics were examined as a function of applied electric field frequency, revealing a decrease in dielectric constant with NiO addition, which was ascribed to the creation of ZnO:NiO interfaces in the composites. Complex impedance analysis was used to confirm the effect of grain and grain boundary resistance on dielectric characteristics. Complex impedance analysis, which supports the predominance of grain boundaries in the conduction process, was used to confirm the effect of grain and grain boundary resistance on the dielectric characteristics.

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Section: Resultsmentioning

confidence: 91%

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Vala,

Pashvan,

Solanki

et al. 2023

ECS J. Solid State Sci. Technol.

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“…To know the conduction mechanism, all σ ac versus frequency curves have been fitted using power law [18]:…”

Section: Ac Conductivity Characteristicsmentioning

confidence: 99%

“…Vikas Kumar et al [10] reported that the parameters of SnO 2 /TiO 2 thin films irradiated with Ar + ions on an ITO substrate were modified. RF magnetron sputtering [11,12], chemical vapor deposition [13], vacuum evaporation [14], electron beam deposition [15], spray pyrolysis [16], sol-gel [17,18], chemical bath deposition (CBD) [19], and spin coating [20] were used to produce thin films of SnO 2 and TiO 2 . Pulsed laser deposition (PLD) is a one-of-a-kind technique for depositing thin films with controlled stoichiometry and epitaxial growth at low temperatures on a desired substrate.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical, and dielectric characteristics of pulsed laser deposited SnO₂-TiO₂ composite thin films

et al. 2023

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Pulsed laser deposition was used to fabricate the thin films of SnO2 and SnO2-TiO2 composites on FTO substrates and these films were characterized to understand the effect of TiO2 on the structural, optical, and electrical properties of SnO2. The crystalline nature, phase purity, and optical bandgap were determined using X-ray diffraction and UV-Vis measurements, respectively. The Tauc plots confirm that the composite films have a higher band gap energy than SnO2. EDX spectra demonstrate that the thin films contain Ti, Sn, and O ions. The photoluminescence (PL) spectra indicate three blue emission bands at wavelengths of 410, 435, and 460 nm and these are due to the oxygen vacancies or interstitial oxygen ions and defect related states formed during the thin-film deposition of SnO2 and composites. These films are n-type semiconductors as verified by the Hall Effect measurements. At the interface of the film, the frequency dependence of the dielectric at room temperature reveals that as the frequency increases, the dielectric constant and dielectric losses decrease. SnO2 film has a significantly higher a.c. conductivity than the SnO2-TiO2 composite films. The correlated barrier hopping (CBH) mechanism is responsible for the conduction behaviour and obeys Johncher's power law (n<1). Both films exhibit a frequency-dependent increase in impedance. The addition of TiO2 in SnO2 affects the structural, optical, dielectric, and ac conductivity of films at room temperature. These optical and n-type semiconducting nature supports the potential application in microelectronics, optoelectronics, and sensor applications.

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Electrochemical performance and large positive–negative magnetodielectric coupling in iron chromite spinels

Naeem

Younus

Awan

et al. 2022

Arabian Journal of Chemistry

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Structural and electrical properties of sol–gel grown (1 − x) (ZnO) + (x) (SnO2) (x = 0, 0.25, 0.5) nanocomposites

Cited by 7 publications

References 57 publications

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Structural, optical, and dielectric characteristics of pulsed laser deposited SnO₂-TiO₂ composite thin films

Electrochemical performance and large positive–negative magnetodielectric coupling in iron chromite spinels

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Structural and electrical properties of sol–gel grown (1 − x) (ZnO) + (x) (SnO2) (x = 0, 0.25, 0.5) nanocomposites

Cited by 7 publications

References 57 publications

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Synthesis and Characterization of ZnO:NiO Nanocomposites Prepared by Phyllanthus Emblica Fruit Extract Assisted Green Method

Structural, optical, and dielectric characteristics of pulsed laser deposited SnO2-TiO2 composite thin films

Electrochemical performance and large positive–negative magnetodielectric coupling in iron chromite spinels

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Product

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Structural, optical, and dielectric characteristics of pulsed laser deposited SnO₂-TiO₂ composite thin films