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Vol. 27, Special Issue, May 2014, pp. 285-289




Electrical Properties of Partial Carbonized Nanoporous Resin Based on Resorcinol-Formaldehyde

1 Imededdine NAJEH, 1 Nabil BEN MANSOUR, 1 Hassan DAHMAN, 2 Ahmed ALYAMANI, 1, 3 Lassaad EL MIR

1 Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Gabes University, Faculty of Sciences in Gabes, Gabes, Tunisia
2 National Nanotechnology Research Centre, KACST, Riyadh, Saudi Arabia
3Al Imam Mohammad Ibn Saud Islamic University (IMSIU), College of Sciences, Department of Physics, Riyadh 11623, Saudi Arabia
1 Tel.: +21697214485, fax: 75 392 421

1 E-mail: Imededdine.Najeh@yahoo.fr


Received: 31 December 2012 /Accepted: 10 August 2013 /Published: 26 May 2014

Digital Sensors and Sensor Sysstems


Abstract: Organic xerogel compounds were prepared by sol-gel method from resorcinol- formaldehyde mixtures in acetone using picric acid as catalyst. The electrical properties of the obtained nanoporous carbon structures were explored by changing the pyrolysis temperature. In this study the electrical conductivity σ can be expressed as σ =/σ0exp(-Eσ/kT), where Eσ depends on the carbonized temperature. The dc and ac conductivities of the obtained amorphous carbon have been investigated from 80 to 300 C and in the frequency range between 40 and 106 Hz for samples pyrolysed at different temperatures in the insulator-metal transition range. The temperature dependence of samples pyrolysed at low temperatures (Tp=600675 C) follows a Mott law, whereas samples pyrolysed at high temperature (Tp=1000 C) show an Arrhenius dependence.


Keywords: Nanoporous Carbon, Resin, Resorcinol-Formaldehyde (RF), Electrical Properties, Variable range hopping (VRH).


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