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Smallest carbon nanotube assigned with atomic resolution accuracy

机译:最小的碳纳米管具有原子分辨率的精度

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The smallest carbon nanotubes with the chiral index (3,3), (4,3), or (5,1) were unambiguously identified for the first time. They were grown inside single-wall carbon nanotubes with the diameter of 1.0-1.2 nm, and the chiral indices were experimentally assigned beyond a doubt by an aberration-corrected high-resolution transmission electron microscopy (HR-TEM). In contrast to a theoretical prediction, the (3,3) nanotube is rather unstable and extremely sensitive to the electron beam and, therefore, may not survive alone without the protection of outer nanotube. The cap structure of (3,3) nanotube is also well-explained by a half-dome of C-20 fullerene, which consists of six pentagons only.
机译:首次明确鉴定出具有手性指数(3,3),(4,3)或(5,1)的最小碳纳米管。它们生长在直径为1.0-1.2 nm的单壁碳纳米管中,并且通过像差校正的高分辨率透射电子显微镜(HR-TEM)毫无疑问地对手性指数进行了实验分配。与理论预测相反,(3,3)纳米管非常不稳定,对电子束极为敏感,因此,如果没有外部纳米管的保护,可能无法单独生存。 (3,3)纳米管的帽状结构也可以通过半球形的C-20富勒烯得到很好的解释,该C-20富勒烯仅由六个五边形组成。

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