The mechanical properties of finite-length (5,0)/(8,0) single-walled carbon nanotube heterojunctions with manipulated topological defects were investigated using molecular dynamics simulations. The results showed that the mechanical properties and deformation behavior of single-walled carbon nanotube heterojunctions were mainly affected not only by the diameter of the thinner segment of the single-walled carbon nanotube heterojunction but also by the orientation of the heptagon-heptagon (7-7) pair in the junction region. Moreover, the orientation of the 7-7 pair more strongly affected those properties during compression loading than during tensile loading. It was found that the location of buckling deformation in the heterojunctions depended upon the orientation of the 7-7 pair in compression.

Influence of Oriented Topological Defects on the Mechanical Properties of Carbon Nanotube Heterojunctions. W.J.Lee, J.G.Chang, A.C.Yang, Y.T.Wang, W.S.Su, C.Z.Wang, K.M.Ho: Journal of Applied Physics, 2013, 114[14], 144306