电子量子约束对碳纳米管束强度的影响

Lucian D. Filip , Valeriu Filip
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引用次数: 2

摘要

径向约束和特定的边界条件导致金属碳纳米管中传导电子的空间分布不均匀。这种负电荷在碳纳米管表面的不均匀分布会引起平行管之间的库仑型相互作用,从而导致相对摩擦。因此,在二维准自由电子近似的框架下,得到了单个理想化碳纳米管两端闭合的轴向传导电子密度。计算了两个平行纳米管之间的库仑势能,并将其作为纵向偏移量的函数。该研究提供了一种简单的方法来估计在平行滑动运动中出现的与库仑管间相互作用相关的摩擦力,对各种碳纳米管束的拉伸阻力和设计各种纳米机电器件具有指导意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of electron quantum confinement on the strength of carbon nanotube bundles

Radial confinement and specific boundary conditions lead to inhomogeneous spatial distributions for conduction electrons in metallic carbon nanotubes.Such uneven spread of negative charge on the surface of a carbon nanotube can induce Coulomb-type interactions between parallel tubes, contributing to the relative friction. Thus, the axial conduction electron density on a single idealized carbon nanotube closed at both ends was obtained in the framework of the two-dimensional quasi-free electron approximation. A Coulomb potential energy between two parallel nanotubes was calculated as a function of the longitudinal offset between them. The study provides a simple method for estimating the friction force related to Coulomb inter-tube interactions appearing during a parallel sliding motion, with implications in the stretching resistance of various carbon nanotube bundles and in designing various nano-electromechanical devices.

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