Growth and defect formation of single-wall carbon nanotubes

The growth of narrow single-wall carbon nanotubes through adduction of smal l carbon clusters is studied using a molecular-dynamics simulation method. Statistical behavior of the growth and defect formation process is analyzed . For C-2 dimer colliding onto the side-wall of narrow single-wall nanotube s, it is very easy to get the dimer to be incorporated into the network of the tube during annealing, forming localized topological defects. During lo ng-time annealing at 2300 K, thermal fluctuation can cause structural switc hing among different metastable states and thereby result in energy pulses in the energy vs time curve.