Chirality-dependent electrical properties of one dimensional single-wall nanotubes (SWNTs)

V. Gayathri; D. Mutharasu; A. Ramasubbu; Vijay K. Varadan

doi:10.1117/12.514833

14 October 2003 Chirality-dependent electrical properties of one dimensional single-wall nanotubes (SWNTs)

V. Gayathri, D. Mutharasu, A. Ramasubbu, Vijay K. Varadan

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514833
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

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.

Citation Download Citation

V. Gayathri, D. Mutharasu, A. Ramasubbu, and Vijay K. Varadan "Chirality-dependent electrical properties of one dimensional single-wall nanotubes (SWNTs)", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514833

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