Spectroscopic study of the Fermi level electronic structure of single-walled carbon nanotubes

被引：270

作者：

Itkis, ME

Niyogi, S

Meng, ME

Hamon, MA

Hu, H

Haddon, RC ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Ctr Nanoscale Sci & Engn, Riverside, CA 92521 USA

[2] Univ Calif Riverside, Dept Chem & Environm Engn, Ctr Nanoscale Sci & Engn, Riverside, CA 92521 USA

来源：

NANO LETTERS | 2002年 / 2卷 / 02期

关键词：

D O I：

10.1021/nl0156639

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electronic structure of single-walled carbon nanotubes (SWNTs) is investigated by transmission spectroscopy of thin films. Hole-doping of SWNTs, as a result of purification, leads to free carrier absorption in the far-IR spectral range. Thermal cycling de-dopes SWNTs, transferring spectral weight from the far-IR to the interband transitions in the near-IR spectral range. After the nanotubes are de-doped, a diameter dependent peak in the far-IR is apparent at similar to100 cm(-1), which we ascribe to a curvature induced energy gap in the DOS of nonarmchair metallic SWNTs.

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页码：155 / 159

页数：5

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