Philip G Collins et al 1998 Nanotechnology 9 153 doi:10.1088/0957-4484/9/3/003
Nanoscale electronic devices on carbon nanotubes
Philip G Collins
, Hiroshi Bando
and A Zettl
Conductivity measurements were performed on bundles of single-walled carbon nanotubes with the aid of a scanning tunneling microscope (STM). Semimetallic current-voltage (I-V) characteristics generally indicated the bundles to be electronically similar to graphite. However, by moving the STM tip along the length of the nanotubes, sharp deviations in the I-V characteristics could also be observed. Well-defined positions were found at which the nanotube transport current changed abruptly from a graphitic response to one that is highly nonlinear and asymmetric, including near-perfect rectification. This abrupt change in the nanotube transport suggests that the STM tip had passed a region of the nanotube which acts less like a wire than it does a Schottky barrier or other heterojunction. Similar on-tube nanodevices have been theoretically predicted for point defects in individual carbon nanotubes and are consistent with our observations.
- PACS
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72.80.Rj Fullerenes and related materials
68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)
73.30.+y Surface double layers, Schottky barriers, and work functions
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 3 (September 1998)
Received 6 January 1998
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Nanoscale electronic devices on carbon nanotubes
Philip G Collins et al 1998 Nanotechnology 9 153
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A Eiling and J S Schilling 1981 J. Phys. F: Met. Phys. 11 623
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Abhijit Biswas et al 2009 Nanotechnology 20 325705
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K A Arnaud et al 2007 Class. Quantum Grav. 24 S529
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