Energy Loss of Carbon Nanotube Cantilevers for Mechanical Vibration
Energy Loss of Carbon Nanotube Cantilevers for Mechanical Vibration
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DOI：
10.1143/jjap.46.6295
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发表时间：
2007-09
影响因子：
1.5
通讯作者：
S. Akita;S. Sawaya;Y. Nakayama
中科院分区：
文献类型：
--
作者：
S. Akita;S. Sawaya;Y. Nakayama
我们研究了纳米管悬臂梁的机械振动的能量损失。通过电弧放电和化学气相沉积合成的纳米管共振的品质因数 Q 与杨氏模量和直径有关，而杨氏模量和直径对应于缺陷密度和范德华 (vdW) 层间相互作用的数量。分子动力学模拟表明，纳米管壁上的针孔缺陷会显着降低 Q 因子，而小应变区域的强度仍然很高，这与完美纳米管的情况类似。此外，Q 因子受到 vdW 层间相互作用的影响。
We have investigated the mechanical vibrations of nanotube cantilevers in terms of energy loss. The quality factors, Q, for the resonant vibrations of nanotubes synthesized by arc discharge and chemical vapor deposition are related to Young's modulus and diameters, which correspond to the defect density and the number of van der Waals (vdW) interlayer interactions. Molecular dynamics simulations reveal that pinhole defects on the wall of a nanotube significantly degrade the Q factor, whereas the strength in a small strain region remains high, which is similar to the case of a perfect nanotube. Furthermore, the Q factor is affected by the presence of the vdW interlayer interactions.