Mechanism of Carbon Nanotubes Aligning along Applied Electric Field
Mechanism of Carbon Nanotubes Aligning along Applied Electric Field
复制标题
碳纳米管沿外加电场排列的机制
DOI：
10.1088/0256-307x/25/1/073
复制
发表时间：
2008
影响因子：
3.5
通讯作者：
G. Wan
中科院分区：
文献类型：
--
作者：
Ma Shao;G. Wan
通过量子力学计算研究了单壁碳纳米管（SWCNT）在外部电场方向上排列的机制。碳纳米管上的旋转扭矩与纵向和横向极化率之间的差异成正比，并随着单壁碳纳米管与外部电场的角度而变化。纵向极化率随长度的二次方增加，而横向极化率随长度线性增加。锯齿形单壁碳纳米管比相同直径的扶手椅型单壁碳纳米管具有更大的纵向和横向极化率，并且对于较长的管，差异变得更大。
The mechanism of single-walled carbon nanotubes (SWCNTs) aligning in the direction of external electric field is studied by quantum mechanics calculations. The rotational torque on the carbon nanotubes is proportional to the difference between the longitudinal and transverse polarizabilities and varies with the angle of SWCNTs to the external electric field. The longitudinal polarizability increases with second power of length, while the transverse polarizability increases linearly with length. A zigzag SWCNT has larger longitudinal and transverse polarizabilities than an armchair SWCNT with the same diameter and the discrepancy becomes larger for longer tubes.