Journal of Materials Science: Materials in Electronics

, Volume 27, Issue 11, pp 11682–11690 | Cite as

Study of carbon/copper nanocomposite synthesized by sol–gel method



Organic–inorganic nanocomposite was obtained after the incorporation of cupric oxide (CuO) nanoparticles in a host matrix based on pyrogallol and formaldehyde (PF) using sol–gel method. The material was subjected to heat treatment under inert atmosphere at 650 °C during 2 h to obtained PF/Cu-650 nanocomposite. The X-ray diffraction analysis exhibited the presence of two phases: metallic copper Cu and graphite C. The voltage–current V(I) characteristics present a negative differential resistance at room temperature. The evolution of the conductivity as a function of measurement temperature indicates the dominance of the three dimensions Godet-variable range hopping transport model. The alternative current conductance was investigated using admittance spectroscopy; the obtained curves show the presence of hopping conduction mechanism. The Nyquist diagrams were used to identify an equivalent circuit and the fundamental parameters of the circuit are determined with the aim to study the contributions of the grains and grain boundaries to the conductivity.


Pyrolysis Temperature Metallic Copper Cupric Oxide Negative Differential Resistance Electrical Equivalent Circuit 


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in GabesGabes UniversityGabèsTunisia
  2. 2.Department of Physics, College of SciencesAl Imam Mohammad Ibn Saud Islamic University (IMSIU)RiyadhSaudi Arabia

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