在紧束缚近似下,利用常量相互作用模型和Landauer-Bütticker公式,计算了扶手椅型和金属锯齿型碳纳米管量子点的电导.发现,根据碳纳米管量子点的长度的不同,扶手椅型碳纳米管量子点的电导可以具有两电子或四电子的壳层结构.而锯齿型碳纳米管量子点的电导却仅有四电子的壳层结构,与长度无关;这些理论结果与之前的实验结果符合的很好. In the tight binding approximation, the conductivity of the armchair and the metal zigzag carbon nanotube quantum dots is calculated using the constant interaction model and the Landauer-Bütticker formula. It is found that depending on the length of the carbon nanotube quantum dots, the armchair type The conductance of carbon nanotube quantum dots can have a two-electron or four-electron shell structure, while the conduction of a zigzag-type carbon nanotube quantum dot has only a four-electron shell structure, regardless of length; these theoretical results are in agreement with the previous experiments The result is in good agreement.