Stability and chirality effect on twist formation of collapsed double wall carbon nanotubes

Stability and chirality effect on twist formation of collapsed double wall carbon nanotubes

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摘要 This study is to reveal the effect of interlayer lattice registry on the formation of collapsed double wall carbon nanotubes (DWCNTs). It is found that collapsed carbon nanotubes can be energetically unstable, metastable or stable, depending mainly on the diameter of the CNT. A fully collapsed DWCNT can adopt different structural morphologies, such as a straight ribbon, a warping ribbon or a twisted ribbon, depending on the chirality of the CNT, which is similar to single wall carbon nanotubes (SWCNTs). Different from SWCNTs, this study also shows some unique phenomena in the formation of collapsed DWCNTs. A fully collapsed DWCNT can have different combinations of the interlayer lattice registry effect within the inner and outer tube, thus the outer tube can influence the formation of the collapsed CNT via lattice registry effect, sometimes even dominates the twist of the CNT. This study is to reveal the effect of interlayer lattice registry on the formation of collapsed double wall carbon nanotubes （DWCNTs）. It is found that collapsed carbon nanotubes can be energetically unstable, metastable or stable, depending mainly on the diameter of the CNT. A fully collapsed DWCNT can adopt different structural morphologies, such as a straight ribbon, a warping ribbon or a twisted ribbon, depending on the chirality of the CNT, which is similar to single wall carbon nanotubes （SWCNTs）. Different from SWCNTs, this study also shows some unique phenomena in the formation of collapsed DWCNTs. A fully collapsed DWCNT can have different combinations of the interlayer lattice registry effect within the inner and outer tube, thus the outer tube can influence the formation of the collapsed CNT via lattice registry effect, sometimes even dominates the twist of the CNT.

作者肖建亮刘彬黄永刚黄克智俞敏峰

机构地区 Department of Engineering MechanicsTsinghua University Department of Mechanical and Industrial EngineeringUniversity of Illinois at Urbana-Champaign

出处《中国有色金属学会会刊：英文版》 CSCD 2006年第B02期776-779,共4页 Transactions of Nonferrous Metals Society of China

基金 Project (10542001) supported by the National Natural Science Foundation of China

关键词双壁碳纳米管扭曲形成稳定性手性效应倒塌 carbon nanotubes lattice registry stability chirality collapse

分类号 TB383.1 [一般工业技术—材料科学与工程]

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中国有色金属学会会刊：英文版

2006年第B02期

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Stability and chirality effect on twist formation of collapsed double wall carbon nanotubes

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