Non-ohmic current–voltage characteristics in single-wall carbon nanotube network

Abstract The non-ohmic current–voltage ( I – V ) characteristics of the single-wall carbon nanotube network were investigated at low temperatures. The temperature dependence of resistivity at low current ( I μ A) shows non-metallic negative d ρ /d T from T =1.4–300 K. Below T I – V curves in the non-ohmic regime can be fitted well by the fluctuation-induced tunneling model, indicating the importance of inter-tubular contacts or inherent energy barriers inside the tubes.

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