Switching and Rectification in Carbon-Nanotube Junctions
- Monday, 12 February 2007
Research shows promise for nanoscale electronic devices.
Following the preliminary studies, current-versus-voltage characteristics of a number of different "Y" junctions of single-wall carbon nanotubes connected to metal wires were computed. Both semiconducting and metallic nanotubes of various chiralities were considered. Most of the junctions considered were symmetric. These computations involved modeling of the quantum electrical conductivity of the carbon nanotubes and junctions, taking account of such complicating factors as the topological defects (pentagons, heptagons, and octagons) present in the hexagonal molecular structures at the junctions, and the effects of the nanotube/wire interfaces. A major component of the computational approach was the use of an efficient Green's function embedding scheme.
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This work was done by Deepak Srivastava of Ames Research Center; Antonis N. Andriotis of the Institute of Electronic Structure and Laser, Foundation for Research and Technology — Hellas; Madhu Menon of the University of Kentucky; and Leonid Chernozatonskii of the Institute of Biochemical Physics of the Russian Academy of Sciences. For further information, access the Technical Support Package (TSP) free on-line at www.techbriefs.com/tsp under the Materials category.
Inquiries concerning rights for the commercial use of this invention should be addressed to the Patent Counsel, Ames Research Center, (650) 604-5104. Refer to ARC-15092.
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