High accuracy curve fits for chirality, length and diameter dependent initial modulus of single walled carbon nanotubes

• Published in: Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2010-11, Vol.43 (1), p.252-255
• Main Authors: Anandatheertha, Sunil, Naik, G. Narayana, Gopalakrishnan, S., Rao, P. Subba
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of nanoscale materials; Nanoscale materials and structures: fabrication and characterization; Nanotubes; Physics
• ISSN: 1386-9477; 1873-1759
• DOI: 10.1016/j.physe.2010.07.018

Many previous studies regarding the estimation of mechanical properties of single walled carbon nanotubes (SWCNTs) report that, the modulus of SWCNTs is chirality, length and diameter dependent. Here, this dependence is quantitatively described in terms of high accuracy curve fit equations. These equations allow us to estimate the modulus of long SWCNTs (lengths of about 100–120 nm) if the value at the prescribed low lengths (lengths of about 5–10 nm) is known. This is supposed to save huge computational time and expense. Also, based on the observed length dependent behavior of SWCNT initial modulus, we predict that, SWCNT mechanical properties such as Young's modulus, secant modulus, maximum tensile strength, failure strength, maximum tensile strain and failure strain might also exhibit the length dependent behavior along with chirality and length dependence.