Inner-tube chirality determination for double-walled carbon nanotubes by scanning tunneling microscopy
Inner-tube chirality determination for double-walled carbon nanotubes by scanning tunneling microscopy
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DOI：
10.1021/nl070072p
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发表时间：
2007-05-01
期刊：
影响因子：
10.8
通讯作者：
Silva, S. Ravi P.
中科院分区：
文献类型：
--
作者：
Giusca, Cristina E.;Tison, Yann;Silva, S. Ravi P.
扫描隧道显微镜和光谱学实验提供了双壁碳纳米管的内部和外部电子结构改变的证据。内管对双壁系统局部态密度的贡献与先前的理论计算一致。因此，基于实验隧道光谱中存在的附加van Hove奇点提取了内管的手性指数。
Evidence for modified electronic structure in double-walled carbon nanotubes with respect to their individual inner and outer constituent single-walled nanotubes is provided by scanning tunneling microscopy and spectroscopy experiments. The contribution originating from the inner tube to the local density of states of the double-walled system was identified in agreement with previous theoretical calculations. Consequently, the chiral index for the inner tube was extracted based on the additional van Hove singularities present in the experimental tunneling spectra.