Tube–tube interaction in double‐wall carbon nanotubes
Tube–tube interaction in double‐wall carbon nanotubes
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双壁碳纳米管中的管-管相互作用
DOI：
10.1002/pssb.200669176
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Kürti
中科院分区：
文献类型：
--
作者：
R. Pfeiffer;F. Simon;H. Kuzmany;V. Popov;V. Zólyomi;J. Kürti
在双壁碳纳米管的拉曼图中，内管的径向呼吸模式被分组为具有相似共振行为的簇。这些簇位于靠近 SDS 包裹的 HiPco 管的共振位置，并且可以传播超过 30 cm–1。与 HiPco 管相比，内管的共振向红光偏移约 50 meV。每个簇代表几种不同外管类型中的一种固定内管类型，并且簇的每个组件源自明确定义的内管/外管对。精细的壳间相互作用模型显示，随着直径差的减小，从外管到内管的电荷转移不断增加。此外，许多 DWCNT 系统似乎是金属的，即它们在费米能级具有有限的态密度。 （© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
In a Raman map of double‐wall carbon nanotubes, the radial breathing modes of the inner tubes are grouped into clusters with similar resonance behavior. These clusters are located close to the resonances of SDS wrapped HiPco tubes and can spread over 30 cm–1. Compared to the HiPco tubes the resonances of the inner tubes are shifted about 50 meV to the red. Each cluster represents one fixed inner tube type in several different outer tube types and each component of a cluster originates from a well defined inner/outer tube pair. Elaborate inter‐shell interaction models showed an increasing charge transfer from the outer to inner tube with decreasing diameter difference. Additionally, many DWCNTs systems seem to be metallic, i.e. they have a finite density of states at the Fermi level. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)