Abstract :
The finite element method is combined with the modified Morse interatomic potential in order to study the role of intertube spacing in the pullout forces of armchair and zigzag double-walled carbon nanotubes. The van der Waals forces between the adjacent tubes are simulated using the ‘6–12’ Lennard-Jones potential. The intertube spacing ranges from 0.34 to 0.5 nm. The results show a significant decrease of pullout forces with increasing the intertube spacing in both types of double-walled carbon nanotubes.
