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Crossed Nanotube Junctions

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Science  21 Apr 2000:
Vol. 288, Issue 5465, pp. 494-497
DOI: 10.1126/science.288.5465.494

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Abstract

Junctions consisting of two crossed single-walled carbon nanotubes were fabricated with electrical contacts at each end of each nanotube. The individual nanotubes were identified as metallic (M) or semiconducting (S), based on their two-terminal conductances; MM, MS, and SS four-terminal devices were studied. The MM and SS junctions had high conductances, on the order of 0.1e 2/h (where e is the electron charge and h is Planck's constant). For an MS junction, the semiconducting nanotube was depleted at the junction by the metallic nanotube, forming a rectifying Schottky barrier. We used two- and three-terminal experiments to fully characterize this junction.

  • * To whom correspondence should be addressed. E-mail: mceuen{at}socrates.berkeley.edu

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