A molecular dynamics study on the vibration of carbon and boron nitride double-walled hybrid nanotubes

Abstract

Synthesis of hybrid nanotubes to overcome the drawbacks of individual pure nanotubes in order to apply them in novel nanodevices has attracted great interest of researchers. To this end, pure single-and double-walled boron nitride nanotubes together with carbon and boron nitride double-walled hybrid nanotubes are simulated through molecular dynamics simulations in order to study their vibrational behavior. The natural frequency of nanotubes is computed, and the effects of geometrical parameters and boundary conditions on the natural frequency are investigated. According to the generated results, the natural frequency of boron nitride nanotubes is higher than that of their carbon counterpart and nanotubes with clamped boundary conditions possess the highest natural frequency compared to other types of boundary conditions. Also, the natural frequency of double-walled hybrid nanotubes is found to be between those of pure double-walled boron nitride and carbon nanotubes with small lengths. It is found that the natural frequency of double-walled hybrid nanotubes is less sensitive to length increase compared to pure double-walled carbon and boron nitride ones, leading to higher frequencies at greater lengths. Finally, to study the variation in natural frequency with the length, a rational curve is fitted to each data set and the corresponding constants are computed.

Beat vibration of hybrid boron nitride-carbon nanotubes – A new avenue to atomic-scale mass sensing

“…1b). It is noted that such a non-planar whirling motion of hybrid nanotubes is in contrast to the conventional transverse vibration reported for CNTs and BNNTs [14][15][16], where the oscillation trajectory of the cross-section is a straight line. To further study the non-planar whirling motion observed for BN-CNTs we plotted the kinetic energy time history in Fig.…”

“…Obviously, homogenous nanotubes, e.g., CNTs or BNNTs, only vibrate in one transverse direction due to their axisymmetric cross-sections [14][15][16]. Thus, newly fabricated hybrid nanotubes are expected to provide a solution to the long-standing issue in achieving the nanosensors for measuring atomic-scale mass.…”

“…Such similarities between BN-CNTs and CNTs/BNNTs suggest that BN-CNTs are also promising for the design of nanoresonators. The vibrations of pristine CNTs and BNNTs have been studied extensively in the past two decades [14][15][16][23][24][25]. Different vibration frequencies were obtained for CNTs and BNNTs even with similar geometric size [16].…”

“…The vibrations of pristine CNTs and BNNTs have been studied extensively in the past two decades [14][15][16][23][24][25]. Different vibration frequencies were obtained for CNTs and BNNTs even with similar geometric size [16]. This observation infers that the frequency of hybrid BN-CNTs should change with the vibration (or bending) direction due to the fact that the bending stiffness of the hybrid nanotubes varies with the bending axis.…”

Torsional Vibration Analysis of Carbon Nanotubes Using Maxwell and Kelvin-Voigt Type Viscoelastic Material Models

“…In literature search, studies about viscoelastic CNT modeling can be found but in majority of papers an elastic structure assumption have been considered. Ansari and Ajori [10] carried out the MD simulation of double-walled Carbon and Boron-Nitride hybrid nanotubes. Static and dynamic analysis of nanorods [11], microbeams [12] and functionally graded Rayleigh beams [13] were investigated by researchers.…”