'Institute of Electrical and Electronics Engineers (IEEE)'
Abstract
Abstract- Transport properties of single and multiwalled carbon
nanotubes, with the tube axes aligned along the bias current
direction, have been studied as a function of the temperature and
applied current. The experimental data are consistent with a
model of charge transport governed by tunnel between potential
barriers created at the connection between the nanotubes or
bundles surfaces and modulated by thermal fluctuations. A
current dependence of the potential energy for both single and
multiwalled samples that gives indications the charge transport
mechanism inside these materials has been obtained. Moreover,
the values of the potential energy found, less for multiwalled with
respect to the single walled nanotubes, confirm the presence of a
metallic component in the samples as shown from the
temperature dependence resistivity data