Effect of defects on oscillatory behaviors of double-walled carbon nanotube oscillators

摘要

Molecular dynamics simulation is performed on the inter-tube friction force and energy dissipation of double-walled carbon nanotube oscillators with vacancy defects. It is found that there are vacancy defect-size and temperature dependences of the friction force between the inner tube and the defective outer tube. The original distance between the "hole" formed by the vacancy carbon atoms and the inserted end of the core has a significant influence on the oscillation profile.