Upper bound for the conductivity of nanotube networks

Details Upper bound for the conductivity of nanotube networks Upper bound for the conductivity of nanotube networks

2009-06-26

arxiv.org/abs/0906.4906v2

Appl. Phys. Lett. 95, 123106 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 1 figure. Minor changes. Accepted for publication in Applied Physics Letters

Scientific paper

10.1063/1.3236534

Films composed of nanotube networks have their conductivities regulated by the junction resistances formed between tubes. Conductivity values are enhanced by lower junction resistances but should reach a maximum that is limited by the network morphology. By considering ideal ballistic-like contacts between nanotubes we use the Kubo formalism to calculate the upper bound for the conductivity of such films and show how it depends on the nanotube concentration as well as on their aspect ratio. Highest measured conductivities reported so far are approaching this limiting value, suggesting that further progress lies with nanowires other than nanotubes.

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