Abstract
The presence of point vacancies and pin holes are the most common flaws found in the lattice structure of carbon nanotubes (CNTs). Additionally, impact of mention defects on the vibrational properties of three-walled carbon nanotubes (TWCNTs) remains unknown. Aim of study, to address these gaps by introducing a novel method for identifying defects in TWCNTs through vibrational analysis. The research employed a molecular structural mechanics technique to simulate 648 samples of TWCNTs, followed by finite element studies to determine their modes of vibration. The natural frequency of the basic vibration of flawed TWCNTs was then determined. It was observed that the natural frequency is inversely proportional to (i) the number of point vacancies and (ii) the diameter of the TWCNTs. Furthermore, the natural frequency exhibited an exponential increase after reaching a mass of 10−20gm in armchair and zigzag TWCNTs, while in chiral TWCNTs, the exponential increase occurred after reaching a mass of10−19gm. Notably, in TWCNTs with 0% and 0.5% vacancy defects, the natural frequency results were very close for chiral TWCNTs when compared to zigzag and armchair TWCNTs.
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