径向载荷下单壁碳纳米管振动频率分析

Analysis of Vibration Properties of Single-walled Carbon Nanotubes under Radial Loads

碳纳米管的基频对外载荷非常敏感。将碳纳米管作为微纳米应变/力传感器敏感元件时要求对基频和外载荷之间的关系进行深入的研究。在单壁碳纳米管分子结构力学模型的基础上,研究了径向载荷和单壁碳纳米管基频之间的关系。结果表明:基频随着径向拉力载荷的增加而线性增加,随着径向压力载荷的增加而线性减小,并且基频对压力载荷更加敏感。

The fundamental frequency of carbon nanotubes is sensitive to the external loads. The potential applications as mo- lecular force sensors make it important to analyze the fundamental frequency of single-wall carbon nanotubes under external loads. The effects of radial loads on the fundamental frequencies of single-wail carbon nanotubes were explored based on the molecular structure mechanics. The results show that the fundamental frequency increases almost linearly to the increase of radial tensile loads and decreases almost linearly to the inrease of radial press loads, and the fundamental frequency is more sensitive to the press loads.