TITLE

Chirality effect of single-wall carbon nanotubes on field emission

AUTHOR(S)
Shi-Dong Liang, K.S.; Xu, N.S.
PUB. DATE
August 2003
SOURCE
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1213
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The chirality effect of an opened-end single-wall carbon nanotube on field emission is studied by using the tunneling theory with the tight-binding approximation. The characteristic of the emission-current line density versus field is found to be dependence on the chirality of nanotubes. A metallic tube has a line density higher than that of a semiconducting one. Also, for semiconducting tubes, a tube of larger chiral angle has a line density higher than that of smaller chiral angle; a zigzag semiconducting tube has a smallest line density among the others. Further, the Fowler–Nordheim plots may have a nonlinear behavior in high current region. Finally, at temperature T<1000 K, the emission current is almost independent of temperature. Our results are explained by the energy band structure of nanotubes. © 2003 American Institute of Physics.
ACCESSION #
10465375

 

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