Zinc oxide incorporating iron nanoparticles with improved conductance and capacitance properties

Ajala, F.; Khelil, M.; Lachheb, Hinda; Khirouni, K.; Houas, Ammar; Azzouz, Abdelkrim

doi:10.1007/s10854-016-5235-5

Cited by 13 publications

(3 citation statements)

References 29 publications

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“…This proportionality is due to the thermal activation of charge hopping between the sides of the potential. 15,36 Similar observations have also been found for various other inorganic 13,37,38 as well as organic materials. 7,10,15,23,27,29 In general, the activation energy can be calculated by using the Arrhenius equation 23 :…”

Section: Ac Conductivitysupporting

confidence: 82%

Dielectric Properties and AC Conductivity of Organic Films of Copper(II) 2,9,16,23-Tetra-tert-butyl-29H,31H- phthalocyanine

Darwish

Alharbi

Hawamdeh

et al. 2019

Journal of Elec Materi

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Copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (CuTTBPc) thin films have been obtained using a physical vapor deposition technique. X-ray diffraction analysis confirmed their amorphous nature. The dielectric constant and electrical conductivity were measured over the frequency range from 50 Hz to 8 MHz and temperature range from 293 K to 393 K. The dependence of the dielectric relaxation spectra on frequency at different temperatures was measured and discussed. In addition, the spectral dynamics of both the real and imaginary parts of the complex electric modulus over a wide temperature range is explained. The activation energy of the relaxation process (DE M) was estimated to be 0.26 eV. Moreover, the dependence of the alternating current conductivity on both temperature and frequency was investigated. Additionally, the exponent (s) of the power law of conductivity versus temperature confirmed that the correlated barrier hopping (CBH) model is a successful and appropriate mechanism to explain the charge transportation inside CuTTBPc films. According to this model, the density of localized states N(E F) at room temperature and frequency of 500 kHz was evaluated to be 4.11 9 10 23 eV À1 cm À3. This high density of electron states indicates that CuTTBPc can be recommended as a candidate material for use in solar cells.

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Section: Ac Conductivitysupporting

confidence: 82%

Dielectric Properties and AC Conductivity of Organic Films of Copper(II) 2,9,16,23-Tetra-tert-butyl-29H,31H- phthalocyanine

Darwish

Alharbi

Hawamdeh

et al. 2019

Journal of Elec Materi

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“…Hexamethylenediamine (HMDA) grafted and Fe nanoparticles incorporation into SnO 2 nanostructures exhibited strong surface affinity of 8.5 µmol/m 2 for H 2 , as an important aspect of green energy storage applications at ambient temperature and pressure conditions [30]. ZnO powders doped with Fe nanoparticles through an in situ dispersion method showed improved conductivity and capacitance as compared to undoped ZnO nanoparticles [31]. HMDA grafted and Fe nanoparticles doped ZnO nanoparticles showed excellent conductivity which was attributed to the formation of effective proton-conductivity on the surface of the ZnO as well as proton transfer between Fe nanoparticles [32].…”

Section: Introductionmentioning

confidence: 99%

Iron-Doped Titanium Dioxide Nanoparticles As Potential Scaffold for Hydrazine Chemical Sensor Applications

et al. 2020

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Herein, we report the fabrication of a modified glassy carbon electrode (GCE) with high-performance hydrazine sensor based on Fe-doped TiO 2 nanoparticles prepared via a facile and low-cost hydrothermal method. The structural morphology, crystalline, crystallite size, vibrational and scattering properties were examined through different characterization techniques, including FESEM, XRD, FTIR, UV-Vis, Raman and photoluminescence spectroscopy. FESEM analysis revealed the high-density synthesis of Fe-doped TiO 2 nanoparticles with the average diameter of 25 ± 5 nm. The average crystallite size of the synthesized nanoparticles was found to be around 14 nm. As-fabricated hydrazine chemical sensors exhibited 1.44 µA µM −1 cm −2 and 0.236 µM sensitivity and limit of detection (LOD), respectively. Linear dynamic ranged from 0.2 to 30 µM concentrations. Furthermore, the Fe-doped TiO 2 modified GCE showed a negligible inference behavior towards ascorbic acid, uric acid, glucose, SO 4 2− , NO 3 − , Pb 2+ and Ca 2+ ions on the hydrazine sensing performance. Thus, Fe-doped TiO 2 modified GCE can be efficiently used as an economical, easy to fabricate and selective sensing of hydrazine and its derivatives.

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“…The decreasing in capacitance at higher frequencies represents that the charges at the interface can not follow the applied conductivity signal. 44,47 In addition, the decrease in the capacitance value between 400 K-450 K for ZnO in Fig. 16a can be explained by the conductivity mechanism that changes at this temperature, as will be given in the conductivity section.…”

Section: Whmentioning

confidence: 89%

Impedance Spectroscopy and Structural Characterization of Nanostructured ZnO and Hf-Doped ZnO Ceramics

Seçkin¹,

Koralay²,

Çavdar³

et al. 2022

ECS J. Solid State Sci. Technol.

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Nanostructured zinc oxide (ZnO) and hafnium-doped zinc oxide ceramic samples were prepared by the sol-gel technique. ZnO and %0.5 hafnium-doped ZnO (HZO) nanostructures and their surface morphologies were studied by X-ray diffraction and field-emission scanning electron microscopy. AC electrical properties (capacitance, conductance, and complex impedance) of ZnO and HZO were studied by impedance analyzer with the frequency range from 20 Hz to 1.5 MHz and temperature range from 300 to 500 K. General analysis of AC electrical measurements showed that both samples had different equivalent circuit diagrams. The best-fitted equivalent circuit diagram for ZnO was "R(RC)(RC)" at all temperatures. The circuit diagram for HZO was "R(RCPE)" at 300, 350, and 400 K temperatures and "R(RCPE)(RCPE)" at 450 and 500 K temperatures. Negative temperature coefficient of resistance (NTCR), non-Debye behavior, and multiple relaxation times were observed.

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Zinc oxide incorporating iron nanoparticles with improved conductance and capacitance properties

Cited by 13 publications

References 29 publications

Dielectric Properties and AC Conductivity of Organic Films of Copper(II) 2,9,16,23-Tetra-tert-butyl-29H,31H- phthalocyanine

Dielectric Properties and AC Conductivity of Organic Films of Copper(II) 2,9,16,23-Tetra-tert-butyl-29H,31H- phthalocyanine

Iron-Doped Titanium Dioxide Nanoparticles As Potential Scaffold for Hydrazine Chemical Sensor Applications

Impedance Spectroscopy and Structural Characterization of Nanostructured ZnO and Hf-Doped ZnO Ceramics

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