Prediction of pull-out force of multi-walled carbon nanotube (MWCNT) in sword-in-sheath mode
Prediction of pull-out force of multi-walled carbon nanotube (MWCNT) in sword-in-sheath mode
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DOI：
10.1016/j.commatsci.2012.03.016
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发表时间：
2012-07
期刊：
影响因子：
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通讯作者：
G. Yamamoto;Sentao Liu;N. Hu;T. Hashida;Yaolu Liu;Cheng Yan;Yuan Li;Haoqian Cui;H. Ning
中科院分区：
文献类型：
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作者：
G. Yamamoto;Sentao Liu;N. Hu;T. Hashida;Yaolu Liu;Cheng Yan;Yuan Li;Haoqian Cui;H. Ning
采用分子力学模拟方法，系统研究了多壁碳纳米管（MWCNTs）外壁对内壁的拔出力。所得结果表明，拔出力与滑动界面上的直接外壁的直径的平方成正比，这突出了MWCNT的帽部分对拔出力的主要贡献。根据数值计算结果，提出了一个简单的经验公式，可以直接从滑动界面上的直接外壁直径预测给定MWCNT中任意拔出的拔出力。此外，多壁碳纳米管与酸处理和不进行拉伸试验进行了纳米操纵器内的扫描电子显微镜（SEM）的真空室，以验证本经验公式。结果表明，理论计算的拔出力与已有的试验结果吻合得很好。
The pull-out force of some outer walls against other inner walls in multi-walled carbon nanotubes (MWCNTs) was systematically studied by molecular mechanics simulations. The obtained results reveal that the pull-out force is proportional to the square of the diameter of the immediate outer wall on the sliding interface, which highlights the primary contribution of the capped section of MWCNT to the pull-out force. A simple empirical formula was proposed based on the numerical results to predict the pull-out force for an arbitrary pull-out in a given MWCNT directly from the diameter of the immediate outer wall on the sliding interface. Moreover, tensile tests for MWCNTs with and without acid-treatment were performed with a nanomanipulator inside a vacuum chamber of a scanning electron microscope (SEM) to validate the present empirical formula. It was found that the theoretical pull-out forces agree with the present and some previous experimental results very well.