Abstract
Electrical conducting carbon (ECC) nanoporous structures were explored by changing the pyrolysis temperature of organic xerogel compounds prepared by sol-gel method from pyrogallol-formaldehyde (PF) mixture in water using picric acid as catalyst. The effect of these preparation parameters on the structural and electrical properties of the obtained ECCs was studied. The obtained results revealed that, the polymeric insulating xerogel phase was transformed progressively with pyrolysis temperature into carbon conducting phase. The temperature-dependent conductivity of the ECC structures show a semiconducting behaviour and the I(V) characteristics present a negative differential resistance.
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