Nano-oscillators based on a Chloride Ion inside Electri - cally Charged Carbon Nanotubes

Presented herein is a molecular dynamics (MD) study on the mechanical oscillatory behavior of a chloride ion tunneling through electrically charged carbon nanotubes (CNTs). It is assumed that the electric charges with similar sign and magnitude are uniformly distributed on the two ends of nanotube. The interatomic interactions between carbon atoms and van der Waals (vdW) interactions between ion and nanotube are modeled by Tersoff-Brenner and Lennard-Jones (LJ) potential functions, respectively, while the electrostatic interactions between ion and electric charges are modeled by Coulomb potential function. Selected numerical results are presented to investigate the effects of sign and magnitude of electric charges on the operating frequency of chloride ion-charged CNT oscillators. It is found out that, higher oscillation frequencies are generated for higher magnitudes of electric charges distributed on the CNT. Also, it is shown that, the frequency of chloride ion inside negatively charged CNTs is lower than that inside positively charged ones for the same magnitude of electric charges of outer shell, while it is higher than that inside uncharged CNTs.