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Extended tight-binding potential for modelling intertube interactions in carbon nanotubes

机译:扩展的紧密结合潜力,可用于模拟碳纳米管中的管间相互作用

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摘要

Due to the intrinsic connection between the mechanical properties of carbon nanotubes and their long-ranged interactions, an accurate description for both covalent and van der Waals forces is desired in nanomechanical studies. A tight-binding treatment offers an accurate description for the covalent bonding but fails to account for the long-ranged attractions and for the energy variations of graphite layers under relative shift. Combining the most reliable experimental data on graphite ( equilibrium interlayer spacing, Z-axis compressibility, and the interlayer shear-mode frequency), tight-binding is extended to model the interlayer interactions of graphitic structures.
机译:由于碳纳米管的机械性能与其长程相互作用之间的内在联系,因此在纳米力学研究中需要对共价力和范德华力的准确描述。紧密结合处理为共价键提供了准确的描述,但未能说明长期吸引和相对位移下石墨层的能量变化。结合最可靠的石墨实验数据(平衡层间间距,Z轴可压缩性和层间剪切模式频率),紧密结合得以扩展,以建模石墨结构的层间相互作用。

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