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The structure relaxation of carbon nanotube

机译:碳纳米管的结构弛豫

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A simple macroscopic continuum elasticity theory (CET) is used to calculate the structure relaxation of a single-wall carbon nanotube (SWNT), an analytic formula is obtained. We also expand an atomic scale three-parameter empirical model (Lenosky et al., Nature 355 (1992) 333) in order to correctly describe the bond-length change effects. The structure relaxation of SWNT expected by the model is in good agreement with our CET results, and very consistent with the previous calculation from a first principles local density functional approximation. Using the expanded Lenosky model, we calculate the strain energy of a bending tube. The obtained results are in agreement with the previous theoretical expectation. It shows that the model may be a good simple replacement of some more sophisticated methods for determining carbon networks deformations. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 20]
机译:用简单的宏观连续弹性理论(CET)计算单壁碳纳米管(SWNT)的结构弛豫,得到解析公式。为了正确描述键长变化的影响,我们还扩展了一个原子尺度的三参数经验模型(Lenosky等人,Nature 355(1992)333)。该模型预期的SWNT的结构弛豫与我们的CET结果非常吻合,并且与先前从第一原理局部密度泛函近似计算得出的结果非常一致。使用扩展的Lenosky模型,我们可以计算弯曲管的应变能。所得结果与先前的理论预期一致。它表明该模型可能是确定碳网络变形的一些更复杂方法的很好的简单替代。 (C)2001 Elsevier Science B.V.保留所有权利。 [参考:20]

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