Vibration of ZnO nanotubes: a molecular mechanics approach |
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Authors: | R Chowdhury S Adhikari F Scarpa |
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Institution: | (1) Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia;(2) Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia; |
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Abstract: | We investigate the vibrational properties of two kinds of single-wall ZnO nanotubes. The simulations are carried out for three
types of zigzag nanotubes (5,0), (8,0), (10,0) and armchair nanotubes (3,3), (4,4), (6,6). The natural frequencies are determined
by means of the molecular mechanics approach with the universal force field potential. The first four natural frequencies
are obtained for length/diameter ratio of about 5–20. The vibration modes associated with these frequencies have been computed.
Closed-form analytical expressions have been derived using the continuum shell theory for the physical explanations of the
simulations results. We observe that the natural frequencies decrease as the aspect ratios increase. The results follow similar
trends with results of previous studies for carbon nanotubes (CNT). However, the magnitudes of the frequencies are lower from
the corresponding CNT counterparts, indicating that ZnO nanotubes are comparatively less stiff. |
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