Computation of chirality- and size-dependent surface Young's moduli for single-walled carbon nanotubes

As we know, the current computational models for counting the Young's moduli of chiral carbon nanotubes are all too complicated for ordinary human beings to master, and this would severely impede the diffusion of the above-mentioned material which will obviously play a dominant role in the nanotechnology age coming soon. In this article, thus, we proffer a really simple method incorporating the closed-form expression of armchair tube with cos(30 degrees - theta) to predict the surface Young's moduli for chiral single-walled carbon nanotubes (SWCNTs). Though very lucid,the present approach seems theoretically to be more reasonable than other existing results since, as can be observed later, the values of surface Young's moduli in them would rapidly come up to 0.36 TPa nm, and this phenomenon simply imply most effort to calculate the Young's moduli would become consummately meaningless as the magnitude of surface Young's moduli might be readily approximated by 0.36 TPa nm, and, only in the present study, the disparity of surface Young's moduli among single-walled nanotubes with dissimilar diameters as well as chiral angles may be distinguished distinctly. (C) 2007 Elsevier B.V. All rights reserved.