Pressure screening in the interior of primary shells in double-wall carbon nanotubes
Pressure screening in the interior of primary shells in double-wall carbon nanotubes
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DOI：
10.1103/physrevb.71.125404
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发表时间：
2005-03-01
影响因子：
3.7
通讯作者：
Kourouklis, GA
中科院分区：
文献类型：
--
作者：
Arvanitidis, J;Christofilos, D;Kourouklis, GA
利用拉曼光谱研究了双壁碳纳米管在10 GPa压力下的压力响应。外管的径向呼吸模式的强度迅速降低，但在高达9 GPa时仍可观察到，表现出与单壁碳纳米管类似（但不太明显）的行为，单壁碳纳米管在较高的压力下会发生形状变形。此外，外管的切向频带变宽，振幅减小。相应的拉曼功能的内部管似乎是相当不敏感的压力。所有的研究结果得出的结论是，外管作为一个保护屏蔽的内管，而后者增加了结构稳定性的外管压力应用。
The pressure response of double-wall carbon nanotubes has been investigated by means of Raman spectroscopy up to 10 GPa. The intensity of the radial breathing modes of the outer tubes decreases rapidly but remain observable up to 9 GPa, exhibiting a behavior similar (but less pronounced) to that of single-wall carbon nanotubes, which undergo a shape distortion at higher pressures. In addition, the tangential band of the external tubes broadens and decreases in amplitude. The corresponding Raman features of the internal tubes appear to be considerably less sensitive to pressure. All findings lead to the conclusion that the outer tubes act as a protection shield for the inner tubes whereas the latter increase the structural stability of the outer tubes upon pressure application.