Structural, dielectric and optical investigation of chemically synthesized Ag-doped ZnO nanoparticles composites

Sagadevan, Suresh; Pal, Kaushik; Chowdhury, Zaira Zaman; Hoque, Enamul

doi:10.1007/s10971-017-4418-8

Cited by 89 publications

(29 citation statements)

References 27 publications

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“…In contrast, other studies reported that the dielectric constant increases with an increase in the size of nanoparticles [20]. The dielectric constant of pure ZnO NPs can be varied depending on the experimental conditions; for example, it was measured to be around ~10 at high frequency region (for particles size of 20 to 35 nm at 30 °C) [21]. The calculated dielectric constant in the current study could be slightly different from the real value.…”

Section: Resultscontrasting

confidence: 75%

Electrically Insulating Plasma Polymer/ZnO Composite Films

et al. 2019

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In this report, the electrical properties of plasma polymer films functionalized with ZnO nanoparticles were investigated with respect to their potential applications in biomaterials and microelectronics fields. The nanocomposite films were produced using a single-step method that combines simultaneous plasma polymerization of renewable geranium essential oil with thermal decomposition of zinc acetylacetonate Zn(acac)2. The input power used for the deposition of composites were 10 W and 50 W, and the resulting composite structures were abbreviated as Zn/Ge 10 W and Zn/Ge 50 W, respectively. The electrical properties of pristine polymers and Zn/polymer composite films were studied in metal–insulator–metal structures. At a quantity of ZnO of around ~1%, it was found that ZnO had a small influence on the capacitance and dielectric constants of thus-fabricated films. The dielectric constant of films with smaller-sized nanoparticles exhibited the highest value, whereas, with the increase in ZnO particle size, the dielectric constant decreases. The conductivity of the composites was calculated to be in the in the range of 10−14–10−15 Ω−1 m−1, significantly greater than that for the pristine polymer, the latter estimated to be in the range of 10−16–10−17 Ω−1 m−1.

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Section: Resultscontrasting

confidence: 75%

Electrically Insulating Plasma Polymer/ZnO Composite Films

et al. 2019

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“…The synthesis process for the preparation of nanoparticles was carried out at the room temperature under ambient condition. In brief, pure ZnO was synthesized by using Deionized water and ethanol, which were taken in equal proportions as solvent for mixing the precursor materials Zinc acetate dihydrate [Zn (CH 3 COO) 2 ] was used as a precipitating agent to maintain the pH (6-7) level of the sol. Finally, the precipitate ZnO sol was added to Citric acid using magnetic stirring at 60°C for 2 h, which gives white milky precipitates.…”

Section: Preparation Methods Of Pure Zno Nps and Ag-doped Zno Nps: Solmentioning

confidence: 99%

“…The material is widely applied in piezoelectric transducers, optoelectronic devices, space detectors, sensor, solar cell windows, etc. ZnO nanoparticles have a II-VI compound semiconducting material and wide bandgap (3.36 eV at room temperature) with substantial Excitonic binding energy (60Ev) [2]. The luminescence properties of these nanostructures also depend on their morphology, growth technique, synthesis method, synthesis conditions and imperfections.…”

Section: Introductionmentioning

confidence: 99%

Structure, morphology and luminescence properties of sol-gel method synthesized pure and Ag-doped ZnO nanoparticles

Chitradevi

Lenus

Jaya

2019

Mater. Res. Express

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Highly Crystalline pure and Ag-doped ZnO nanoparticles were prepared using the inexpensive sol-gel synthesis method with the stimulation of transition metal ion surfactant. The prepared pure and Agdoped (Silver doped) ZnO nanoparticles were characterised by various sophisticated techniques like x-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Dynamic Light scattering (DLS), Fourier Transform Infrared Spectroscopy (FTIR), UV-visible absorption, Photoluminescence (PL) and Zeta potential. The result indicates that the average grain size of the prepared nanoparticles was found to be a minuscule 24 nm with a commendable bandgap of 3.21 eV and 1.73 eV respectively. The hexagonal wurzite structures of pure and Ag-doped ZnO at room temperature confirmed the luminescence characteristics of the nanoparticles.

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“…Such dielectric behavior of the ZnO nanodiscs may be attributed to contribution from different kinds of polarization such as electronic, ionic, dipolar, orientation and space-charge polarization. [42][43][44][45] The dielectric loss tangent (tan d) of the ZnO nanodisc ( Fig. 7b) also shows a similar trend to that of the dielectric constant and reached a low value of 0.005 at 2 MHz.…”

Section: Resultsmentioning

confidence: 90%