Vanishing of the Breit-Wigner-Fano component in individual single-wall carbon nanotubes.
Vanishing of the Breit-Wigner-Fano component in individual single-wall carbon nanotubes.
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DOI：
10.1103/physrevlett.94.237401
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发表时间：
2005-06
影响因子：
8.6
通讯作者：
M. Paillet;P. Poncharal;A. Zahab;J. Sauvajol;J. Meyer;S. Roth
中科院分区：
文献类型：
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作者：
M. Paillet;P. Poncharal;A. Zahab;J. Sauvajol;J. Meyer;S. Roth
为了明确地确定Breit-Wigner-Fano（BWF）分量的强度与束的大小的依赖关系，我们测量了定义良好的金属单个单壁碳纳米管（SWCNT）和单个SWCNT束的径向呼吸模式和切向模式（TM）。为此，我们开发了一套完整的程序，包括基底制备、样品制备、原子力显微镜成像和拉曼光谱。从这个过程中，我们明确地表明BWF成分在孤立的金属单壁碳纳米管中消失。换句话说，在TM束中观察到BWF组分是金属SWCNT束的固有特征。
In order to decide definitely on the dependence of the intensity of the Breit-Wigner-Fano (BWF) component with the size of the bundle, we have measured the radial breathing modes and tangential modes (TMs) of well defined metallic individual single-wall carbon nanotubes (SWCNTs) and individual SWCNT bundles. In this aim, a complete procedure including the preparation of the substrates, the sample preparation, atomic-force-microscopy imaging and Raman spectroscopy has been developed. From this procedure, we show unambiguously that the BWF component vanishes in isolated metallic SWCNTs. In other words, the observation of a BWF component in the TM bunch is an intrinsic feature of the metallic SWCNT bundle.