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Improved Electric Transport Properties of a Multi-wall Carbon
Nanotube |
LI Qiu-Hong;WANG Tai-Hong |
Institute of Physics, Chinese Academy of Sciences, Beijing
100080 |
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Cite this article: |
LI Qiu-Hong, WANG Tai-Hong 2003 Chin. Phys. Lett. 20 1333-1335 |
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Abstract Up to now quantized conductance of the carbon nanotube has only been observed by replacing the tip of a scanning probe microscope with the tube and putting the other end of the tube in a liquid metal [Science 280 (1998) 1744]. Probably cleaning the tube by the liquid metal has improved its quality and gives rise to the quantized conductance. We report on a new method to improve the electric transport properties of a single multi-wall carbon nanotube by Joule heating. Our experiment indicates that the conductance of the tube can be greatly improved just by repeated scanning the bias voltage in vacuum.
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Keywords:
72.15.Jf
61.46.+w
65.80.+n
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Published: 01 August 2003
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