Monochiral tubular graphite cones formed by radial layer-by-layer growth
Monochiral tubular graphite cones formed by radial layer-by-layer growth
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DOI：
10.1103/physrevb.71.113411
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发表时间：
2005-03
影响因子：
3.7
通讯作者：
Guangyu Zhang;X. Bai;E. Wang;Yufeng Guo;Wanlin Guo
中科院分区：
文献类型：
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作者：
Guangyu Zhang;X. Bai;E. Wang;Yufeng Guo;Wanlin Guo
以管状石墨锥（TGC）形式生长的多壁碳纳米管产量很高。结构分析表明，TGC中多壁的手性几乎相同，且优先呈之字形。这种TGCs的形成可以分别用沿径向和轴向两个不同的过程来解释。基于根的径向生长是通过一层一层的模式来控制管的手性。轴向生长以几乎相同的手性角扩展小管。总能量计算结果表明，具有近之字形手性的内管有利于单手性多壁结构的模板生长，与实验结果吻合较好。
Multiwalled carbon nanotubes in the form of tubular graphitic cones (TGC) are grown at high yield. Structure analysis reveals that chirality of the multiple walls in a TGC are nearly identical to each other and preferentially zigzag. The formation of such TGCs is explained by two separate processes along radial and axial directions, respectively. The root-based radial growth is via a layer-by-layer mode that controls the chirality of tubes. The axial growth extends the tubules with nearly identical chiral angles. Total energy calculations indicate that the inner tube with near zigzag chirality is favored to template the growth of monochiral multiwalled structures, in good agreement with experiments.