Double-wall carbon nanotubes under pressure: Probing the response of individual tubes and their intratube correlation
Double-wall carbon nanotubes under pressure: Probing the response of individual tubes and their intratube correlation
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DOI：
10.1103/physrevb.72.193411
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发表时间：
2005-11-01
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
对双壁碳纳米管模型体系进行了高压拉曼实验。径向呼吸模式的共振拉曼分布的变化提供了内管带隙随压力减小的独特演示。内管归一化模式压力系数与频率的总体趋势揭示了单个碳纳米管的尺寸依赖性特性。此外，由于内-外管（管内）耦合及其管间距依赖性，它们的准线性分组表明了特定的内-外管组合的存在。
High pressure Raman experiments were performed on the model system of double-wall carbon nanotubes. Changes in the resonance Raman profile of the radial breathing modes provide a unique demonstration of the inner tubes' band gap reduction with pressure. The overall trend of the internal tubes' normalized mode pressure coefficients vs frequency reveals the size-dependent properties of individual carbon nanotubes. Moreover, their quasilinear grouping, attributed to the inner-outer tube (intratube) coupling and its tube spacing dependence, manifests the existence of specific inner-outer tube combinations.