Kang Jeong Won, Choi Young Gyu, Kim Younghoon, Jiang Qing, Kwon Oh Kuen, Hwang Ho Jung
Department of Computer Engineering, Chungju National University, Chungju 380-702, Republic of Korea.
J Phys Condens Matter. 2009 Sep 23;21(38):385301. doi: 10.1088/0953-8984/21/38/385301. Epub 2009 Aug 24.
Analysis of vibrational characteristics of cantilevered double-walled carbon nanotube (DWCNT) resonators is carried out based on classical molecular dynamics simulation. Vibrational frequencies of DWCNTs are less than those of single-walled carbon nanotubes (SWCNTs) with the same length and the same diameter because of van der Waals intertube interaction. For DWCNTs with short outer walls, the resonance frequency initially increases with increasing outer nanotube length and then decreases after a peak, and thus the result can be modeled by a Gaussian distribution. The frequency of DWCNT resonators with short outer walls is a maximum when the length of the outer wall is about 72.5% of the length of the inner wall.
基于经典分子动力学模拟对悬臂式双壁碳纳米管（DWCNT）谐振器的振动特性进行了分析。由于范德华管间相互作用，双壁碳纳米管的振动频率低于相同长度和相同直径的单壁碳纳米管（SWCNT）。对于外壁较短的双壁碳纳米管，共振频率最初随着外纳米管长度的增加而增加，然后在达到峰值后下降，因此该结果可以用高斯分布来建模。当外壁长度约为内壁长度的72.5%时，外壁较短的双壁碳纳米管谐振器的频率最高。
