FULLY COLLAPSED CARBON NANOTUBES
FULLY COLLAPSED CARBON NANOTUBES
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DOI：
10.1038/377135a0
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发表时间：
1995-09-14
期刊：
影响因子：
64.8
通讯作者：
ZETTL, A
中科院分区：
文献类型：
--
作者：
CHOPRA, NG;BENEDICT, LX;ZETTL, A
已经提出（1）由于碳-碳键的固有强度，碳纳米管（2）的拉伸强度可能超过其它已知纤维的拉伸强度。纳米管的弹性特性的计算证实，它们在轴向方向上是极其刚性的，并且最有可能在垂直于轴的方向上变形（3，4）。已经观察到具有局部扭结和弯曲（5，6）以及微小径向变形（7，8）的碳纳米管。在这里，我们报告存在的多壳碳纳米管的整体几何形状从根本上不同于一个直的，中空的圆柱体。我们的观察揭示了纳米管已经遭受完全崩溃沿着其长度。理论模型表明，对于给定的管参数范围，完全塌陷的纳米管在能量上比更熟悉的具有圆形横截面的“膨胀”形式更有利。
IT has been suggested(1) that the tensile strength of carbon nanotubes(2) might exceed that of other known fibres because of the inherent strength of the carbon-carbon bond. Calculations of the elastic properties of nanotubes confirm that they are extremely rigid in the axial direction and are most likely to distort perpendicular to the axis(3,4). Carbon nanotubes with localized kinks and bends(5,6), as well as minor radial deformations(7,8), have been observed. Here we report the existence of multi-shelled carbon nanotubes whose overall geometry differs radically from that of a straight, hollow cylinder. Our observations reveal nanotubes that have suffered complete collapse along their length. Theoretical modelling demonstrates that, for a given range of tube parameters, a completely collapsed nanotube is favoured energetically over the more familiar 'inflated' form with a circular cross-section.