碳纳米管分子秤的理论研究

介绍了基于单根碳纳米管的纳米分子秤系统，以及其测量分子（团）质量的基本原理，建立了适用于该系统的纳米悬臂梁模型，通过求解系统的振动方程，研究了系统的固有频率与分子（团）质量之间的关系，用数值法计算了两者的函数曲线。结果表明，碳纳米管可以直接测量ｆｇ级的分子（团）质量，当分子（团）质量超过碳纳米管自身质量时，纳米分子秤变得不够灵敏。

Investigation of Nanobalance for molecules Based on Carbon Nanotube

The nanobalance for molecules (particles) based on an individual carbon nanotube is described. Constructed is a model using a cantilevered nanobeam for the balance system. The intrinsic frequency of the system is studied as a function of the loaded mass by solving the governing vibration equation. The result gives the mass dependent frequency plot of the system. The nanobalance is subtle for mass of molecules less than that of the carbon nanotube of the order of fg.