Effect of Thermal Dependency of Diameter on Density of States for Zigzag Carbon Nano-Tubes

Abstract

Gaining control over the various parameters of carbon nanotubes-(CNTs) has always been a challenge for researchers. This is because, each parameter depends on a carbon nanotube's dimensions in addition to its structure and composition. This paper aims to investigate how the thermal dependency of structural parameters -like diameter- affects the density of states (DOS). To accomplish this, the study first reviews the basic theoretical aspects of CNTs, we then present calculations of the energy band structures for armchair carbon nanotubes-(aCNTs), zigzag carbon nanotubes-(zCNTs), and chiral carbon nanotubes-(cCNTs). Finally, the study derives the DOSs to help provide an understanding of the relationship between the radial expansion of the diameter and the DOS for typical zCNTs.