Abstract
In this work, the simple model recommended by Kovacs is progressed for tunneling conductivity of graphene-based samples assuming the total contact resistance and interphase pieces. The amount, dimensions and conduction of graphene nanosheets as well as the tunneling resistivity and contact size express the total contact resistance. Moreover, the actual filler content and percolation beginning take into account the interphase pieces. The forecasts of the novel model are linked to the measured results. In addition, the stimuli of factors on the contact resistance and conductivity of system are studied. The model’s productions acceptably follow the experimented data of several examples. Thinner graphene nanosheets simultaneously increase the contact resistance and the conductivity of system. Also, larger graphene nanosheets and shorter contact size definitely diminish the contact resistance and improve the conductivity. Nonetheless, the graphene’s conductivity does not affect the contact resistance and nanocomposite’s conductivity, because super-conductive graphene causes too poorer resistance in the contact pieces compared to insulated polymer layer.
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