Abstract
Carbon nanotubes with bridged boundary conditions are widely used in the design of nano-sensors and oscillators. However, defects are inseparable from the carbon nanotubes which can affect its dynamics behavior and sensing performance. Influence of hexa-vacancy defect in terms of their numbers and migration along the length of the bridged single-walled carbon nanotube (SWCNT) is investigated through MD simulations. Moreover, effects of geometric parameters like length, diameter and chirality are studied for pristine SWCNT under bridged boundary condition. Effects of these aspects on free vibration response of SWCNT are studied through change in principal natural frequencies. It is observed that effect on the natural frequency get enhanced with increase in numbers of vacancy defect. Vibration characteristics of bridged SWCNT are less affected by the vacancy defect placed at mid-portion of the tube length. It is also found that shorter and thicker SWCNT offer higher vibrational sensitivity. Effect of chirality becomes less pronounced for longer tubes. The results of this study provide valuable input in the design of SWCNT-based nano-sensors.
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Goel, M., Harsha, S.P., Mishra, M.P. et al. Effect of Geometrical Parameters and Hexa-Vacancy Defects on Vibration Characteristics of Bridged Carbon Nanotube. J Fail. Anal. and Preven. 20, 1875–1883 (2020). https://doi.org/10.1007/s11668-020-01001-w
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DOI: https://doi.org/10.1007/s11668-020-01001-w