采用紧束缚模型研究了悬挂端对单壁碳纳米管电子输运特性的影响.结果表明:有限长悬挂端开口碳纳米管的电导在费米能级附近作周期性振荡.椅型(armchair)碳纳米管的振荡同时具有快、慢两个准周期,而锯齿型(zigzag)碳纳米管的振荡仅有一个周期;碳纳米管电导在费米能级附近的振荡周期随着悬挂端的增长而减小.研究还发现:有限长悬挂端开口碳纳米管的平均电导随探针与碳纳米管间耦合强度的增加而增大,其大小约为无限长悬挂端开口碳纳米管平均电导的两倍. The tight binding model was used to study the effect of the dangling ends on the electron transport properties of single-walled carbon nanotubes. The results show that the conductance of the carbon nanotubes with finite length of dangling ends oscillates periodically around the Fermi level. The oscillation of carbon nanotubes has both fast and slow quasi-periodic while the zigzag carbon nanotubes oscillate only one cycle. The oscillation period of carbon nanotubes near the Fermi level increases with the increase of the dangling end Decrease.The results also show that the average conductivity of carbon nanotubes with finite length of hanging ends increases with the increase of the coupling strength between probe and carbon nanotubes.The size of the carbon nanotubes is about two Times