Determination of optical isomers for left-handed or right-handed chiral double-wall carbon nanotubes
Determination of optical isomers for left-handed or right-handed chiral double-wall carbon nanotubes
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DOI：
10.1103/physrevlett.95.187406
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发表时间：
2005-10-28
影响因子：
8.6
通讯作者：
Iijima, S
中科院分区：
文献类型：
--
作者：
Liu, Z;Suenaga, K;Iijima, S
首次研究了嵌套双壁碳纳米管(DWNTs)相邻层之间的左右手关系。我们对一系列样品倾斜的高分辨电子显微镜分析可以成功地分辨出DWNT中每个组成纳米管的利手，从而可以唯一地确定内外纳米管的手性指数(n，m)，包括它们的光学异构体[(n，m)或(m，n)]。结果表明，在所研究的样品中，内、外纳米管中的右旋和左旋纳米管均匀分布，并且在DWNT中相邻的两层之间可能存在较好的左旋关系。
The handedness relationship between adjacent layers in nested double-wall carbon nanotubes (DWNTs) has been investigated for the first time. Our high-resolution electron microscopy analysis on a series of specimen tilts can successfully tell the handedness of each constituent nanotube in a DWNT, and therefore the chiral indices (n,m) including their optical isomers [(n,m) or (m,n)] of inner and outer nanotubes can be uniquely determined. It is shown that right-handed and left-handed nanotubes are equally distributed for both the inner and outer nanotubes in the examined specimens and a preferable handedness relationship between the adjacent layers in DWNT may exist.