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Resonant Raman Scattering of the Smallest Single-Walled Carbon Nanotubes

Authors Tang, Zikang
Zhai, Jianpang
Tong, Y.Y.
Hu, Xi-Jun
Saito, Riichiro
Feng, Y.J.
Sheng, Ping
Issue Date 2008
Source Physical Review Letters , v. 101, (4), July 2008
Summary We report optical properties of the smallest single-walled carbon nanotubes (SWNTs) with a diameter of only 3 A. These ultrasmall SWNTs are fabricated in the elliptical nanochannels of an AlPO-11 (AEL) single crystal. Polarized and resonant Raman scattering unambiguously revealed that these 0.3 nm SWNTs are of (2,2) armchair symmetry. Interestingly, the (2,2) armchair tube has two metastable ground states corresponding to two slightly different lattice constants in the axial direction: one state is metallic and the other is semiconducting.
ISSN 0031-9007
Rights © 2008 The American Physical Society.
Language English
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