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Proceedings Paper

Chirality-dependent electrical properties of one dimensional single-wall nanotubes (SWNTs)
Author(s): V. Gayathri; D. Mutharasu; A. Ramasubbu; Vijay K. Varadan
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Paper Abstract

Carbon Nanotubes (CNTs) can be considered as a sheet of graphite rolled in to a seamless cylinder, which exhibits unique electrical and mechanical properties. Based on the way of rolling the graphene sheets, there are three types of CNTs, armchair, zigzag and chiral tubes. Both the diameter and chiral angle determine the electronic properties of these nanostructures. In this paper we have studied the variation of the band gap as a function of chiral angle for various sets of lattice indices. The energy expression in the tight binding approximation is also obtained for the 2D graphene sheets with hexagonal lattice. In order to analyze the role of impurity, we have considered the impurity confined within these one-dimensional structures. By taking a suitable one-electron wave function we have obtained the <H>min. For an impurity confined in CNTs.

Paper Details

Date Published: 14 October 2003
PDF: 5 pages
Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); doi: 10.1117/12.514833
Show Author Affiliations
V. Gayathri, Thiagarajar College of Engineering (India)
D. Mutharasu, Thiagarajar College of Engineering (India)
A. Ramasubbu, Thiagarajar College of Engineering (India)
Vijay K. Varadan, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 5062:
Smart Materials, Structures, and Systems
S. Mohan; B. Dattaguru; S. Gopalakrishnan, Editor(s)

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