Simulations of double-walled carbon nanotubes under bending deformation were carried out using the tight-binding molecular dynamics method. Five- and seven-membered ring pair defects were formed following the emission of several atoms from the structure. These defect pair couples had various structures, corresponding to the number of emitted atoms, and stabilized the resultant nanotubes. The results implied that the defect pair couples were one of the potential sources of the experimentally observed plastic deformation that occurred in double-walled carbon nanotubes. The various defects obtained by simulation were related to other defect types.

Formation of a Five-Seven Pair Couple Defect in Double-Walled Carbon Nanotubes under Bending Deformation. K.Wako, I.Okada, M.Tachibana, K.Kojima, T.Oda: Journal of Applied Physics, 2007, 102[11], 113522