Resonant Raman scattering of the smallest single-walled carbon nanotubes
Resonant Raman scattering of the smallest single-walled carbon nanotubes
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DOI：
10.1103/physrevlett.101.047402
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发表时间：
2008-07-25
影响因子：
8.6
通讯作者：
Sheng, Ping
中科院分区：
文献类型：
--
作者：
Tang, Z. K.;Zhai, J. P.;Sheng, Ping
我们报道了直径仅为3埃的最小单壁碳纳米管（SWNTs）的光学性质。这些超小的单壁碳纳米管在AlPO-11（AEL）单晶的椭圆形纳米通道中制造。偏振和共振拉曼散射明确地表明，这些0.3 nm的单壁碳纳米管是（2，2）扶手椅对称。有趣的是，（2，2）扶手椅管有两个亚稳基态，对应于轴向两个略有不同的晶格常数：一个状态是金属的，另一个是半导体的。
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.