Stability of carbon nanotubes: how small can they be?
Stability of carbon nanotubes: how small can they be?
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DOI：
10.1103/physrevlett.85.3249
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发表时间：
2000-10
影响因子：
8.6
通讯作者：
L. Peng;Z. Zhang;Z. Xue;Q. D. Wu;Z. Gu;D. Pettifor
中科院分区：
文献类型：
--
作者：
L. Peng;Z. Zhang;Z. Xue;Q. D. Wu;Z. Gu;D. Pettifor
通过高分辨率透射电子显微镜发现了直径为0.5和0.33 nm的小单壁碳纳米管的存在的实验证据，并使用紧束缚分子动力学模拟研究了它们的机械稳定性。结果表明，虽然直径小于0.4 nm的碳管在能量上不如石墨烯片有利，但其中一些在高达1100 ℃的温度下确实是机械稳定的。观察到的0.33 nm碳管可能是（4，0）管，实际上是复合纳米管系统的一部分，该复合纳米管系统形成了可能是迄今为止合成的最小的金属-半导体-金属管状结。
Experimental evidence has been found for the existence of small single wall carbon nanotubes with diameters of 0.5 and 0.33 nm by high resolution transmission electron microscopy, and their mechanical stability was investigated using tight-binding molecular dynamics simulations. It is shown that, while the carbon tubes with diameters smaller than 0.4 nm are energetically less favorable than a graphene sheet, some of them are indeed mechanically stable at temperatures as high as 1100 degrees C. The 0.33 nm carbon tube observed is likely a (4, 0) tube and is indeed part of a compound nanotube system that forms perhaps the smallest metal-semiconductor-metal tubular junction yet synthesized.