Macroscopic effects of tunneling barriers in nanotube bundles aggregates

Details Macroscopic effects of tunneling barriers in nanotube bundles aggregates Macroscopic effects of tunneling barriers in nanotube bundles aggregates

2009-04-17

arxiv.org/abs/0904.2711v4

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages and 3 figures

Scientific paper

We report on experiments conducted on single walled carbon nanotube bundles aligned in chains and connected through a natural contact barrier. The dependence upon the temperature of the transport properties is investigated for samples having different characteristics. Starting from two bundles separated by one barrier deposited over four contact probes, we extend the study of the transport properties to samples formed by chains of several bundles. The systematic analysis of the properties of these aggregates shows the existence of two conduction regimes in the barrier. We show that an electrical circuit taking into account serial and parallel combinations of voltages generated at the junctions between bundles models the samples consistently.

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