dc and ac characterizations of electrical conducting nanoporous carbon structures based on resorcinol-formaldehyde

Najeh, I.; Mansour, N. Ben; Dahman, H.; Alyamani, Ahmed Y.; Mır, L. El

doi:10.1016/j.jpcs.2011.12.007

Cited by 15 publications

(6 citation statements)

References 55 publications

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“…For each temperature there is a critical frequency ω p beyond which a power law is followed. Kilbride et al [64,65] proposed an experimental definition of the critical frequency by the following formula: σ(ω p ) = 1.1σ DC . The value of σ DC can be estimated from the plateau of σ(ω) for each sample at the studied temperature range.…”

Section: Ac Conductivity Scalingmentioning

confidence: 99%

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Ladhar

Arous

Kaddami

et al. 2015

Journal of Molecular Liquids

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Section: Ac Conductivity Scalingmentioning

confidence: 99%

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Ladhar

Arous

Kaddami

et al. 2015

Journal of Molecular Liquids

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“…Their morphology is a key consideration for their potential capabilities to be fully assessed and utilized. There are various kinds of carbon morphologies, described often as nanoporous materials [13], powders [14], microspheres [15], etc. Each morphology has special merits and demerits; and thus should be chosen carefully to suit the targeted applications [16,17].…”

Section: Introductionmentioning

confidence: 99%

Nanofeatures of resorcinol–formaldehyde carbon microspheres

Awadallah‐F

Al‐Muhtaseb

2012

Materials Letters

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“…The impedance spectrum is characterized by the appearance of semicircle arcs whose pattern changes, but not their shapes, when the temperature increases. Such pattern tells us about the electrical processes occurring within the sample and their correlation with the sample microstructure when modeled in terms of an electrical equivalent circuit [37][38][39][40]. Z-view software has been used to fit the experimental data.…”

Section: Resultsmentioning

confidence: 99%

Silicon carbide/carbon nanocomposite for negatronic applications

Gouadria

Dahman

Najeh

et al. 2015

J Mater Sci: Mater Electron

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Silicon carbide (SiC) has been synthesized by sol-gel technique by mixing 30 % mass ratio of silica nanoparticles with 70 % of resorcinol-formaldehyde the carbon precursor solution. After a drying phase, the sample was heated during two hours at different pyrolysis temperatures until 1400°C in tubular furnace under open argon atmosphere. The obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy, current-voltage (I-V) and alternating current (ac) techniques in the temperature range between 80 and 300 K. Observations from the XRD for the sample prepared at 1400°C, show three pronounced lines at 36°, 60°a nd 72°corresponding respectively to (111), (200) and (311) cubic b-SiC phase characteristic orientations. The temperature-dependence conductivities of the obtained structures show a semiconducting behavior and the I(V) characteristics present a negative differential resistance for all measurement temperatures between 80 and 300 K. The ac investigation was carried out for a wide range of frequency from 40 Hz to 110 MHz. The impedance plane plots show semicircle arcs at different temperatures. An electrical equivalent circuit has been proposed to explain the impedance results and the fundamental parameters of the circuit are determined at different temperatures in order to identify the contributions of the grains and boundary grains to the conductivity.

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dc and ac characterizations of electrical conducting nanoporous carbon structures based on resorcinol-formaldehyde

Cited by 15 publications

References 55 publications

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Nanofeatures of resorcinol–formaldehyde carbon microspheres

Silicon carbide/carbon nanocomposite for negatronic applications

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