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Carbon nanotube/epoxy resin composites with different levels of nanotube dispersion in the polymer matrix were prepared. The effects of nanotube dispersion on tunneling conductive behavior of such composites were investigated. The composites with homogeneous nanotube dispersion were found to exhibit larger static electrical conductivity and smaller percolation threshold than those with poorer nanotube...
Zener tunneling is identified in carbon nanofiber (CNF)/high density polyethylene (HDPE) composites exposed to external electric field. It is caused by the intense internal field strength due to the field enhancement effect. By combining Zener tunneling effect with percolation theory, a novel current density–electric field relationship is developed, which is applicable to carbon/polymer composites...
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