之字形碳纳米管嵌套C36富勒烯Stone-Wales缺陷的理论研究

K. Grishakov, K. Katin, M. Maslov
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引用次数: 8

摘要

我们应用PBE/6-311G(d)水平的密度泛函理论和非正交紧密结合模型研究了嵌入(14,0)之字形碳纳米管中的C36富勒烯的Stone-Wales转变。我们优化了两种不同的异构体的几何形状,它们的对称性和过渡态将它们分开。计算出封闭C36从Stone-Wales到对称的转变机理与孤立C36相同。发现外碳壁对异构体有明显的稳定作用。然而,碳纳米管使Stone-Wales重排的激活势垒比分离后的C36降低了0.4 eV。
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Theoretical Studies of the Stone-Wales Defect in C36 Fullerene Embedded inside Zigzag Carbon Nanotube
We apply density functional theory at PBE/6-311G(d) level as well as nonorthogonal tight-binding model to study the Stone-Wales transformation in C36 fullerene embedded inside the (14,0) zigzag carbon nanotube. We optimize geometries of two different isomers with the and the symmetries and the transition state dividing them. The mechanism of Stone-Wales transformation from to symmetry for the encapsulated C36 is calculated to be the same as for the isolated one. It is found that the outer carbon wall significantly stabilizes the isomer. However, carbon nanotube reduces the activation barrier of Stone-Wales rearrangement by 0.4 eV compared with the corresponding value for the isolated C36.
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