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arXiv 0705.3429cond-mat.mtrl-sci
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碳纳米管的弹性性质:原子论方法

Elastic Properties of Carbon nanotubes : An atomistic approach

Roby Cherian, Priya Mahadevan

摘要:

从能量上讲,单层石墨(石墨烯)比纳米管更稳定。两个系统之间的能量差可以直接与卷起石墨烯片以形成纳米管所涉及的应变能相关。我们已经进行了第一原理电子结构计算和评估的应变能作为纳米管半径的函数。应变能对纳米管直径的依赖性已经被几个小组发现可以用连续弹性模型很好地描述。我们试图研究为什么会出现这种情况,并表明原子论进入描述。

英文摘要:

Energetically the single sheet of graphite (graphene) is more stable than the nanotube. The energy difference between the two systems can be directly related to the strain energy involved in rolling up the graphene sheet to form the nanotube. We have carried out first principle electronic structure calculations and evaluated the strain energy as a function of the nanotube radius. The dependence of the strain energy on the diameter of the nanotube has been found by several groups to be welldescribed by a continuum elasticity model. We attempt to examine why this is the case and show where atomistics enter the description.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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