Terahertz conductivity of anisotropic single walled carbon nanotube films
Terahertz conductivity of anisotropic single walled carbon nanotube films
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DOI：
10.1063/1.1476713
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发表时间：
2002-05-06
影响因子：
4
通讯作者：
Lee, YH
中科院分区：
文献类型：
--
作者：
Jeon, TI;Kim, KJ;Lee, YH
利用光电太赫兹时域光谱系统测量了单壁碳纳米管薄膜的吸收和色散。利用棒式涂布机通过简单的机械挤压制备了各向异性取向的纳米管薄膜。然后测量角度依赖性吸收和色散值。结果表明，折射率随频率的增加而减小（0.1-0.8太赫兹），而真实的电导率随频率的增加而增加。测量的真实的电导率与简单的Drude模型不一致，但它遵循Maxwell-Garnett模型，其中纳米管嵌入在介电宿主中。(C)2002年美国物理学会。
Absorption and dispersion of singlewalled carbon nanotube films were measured using an optoelectronic THz beam system for THz time-domain spectroscopy. The anisotropically aligned nanotube films were prepared through simple mechanical squeezing with a bar coater. The angle-dependent absorption and dispersion values were then measured. Results indicate that the index of refraction decreases with increasing frequency (0.1-0.8 THz), whereas the real conductivity increases with increasing frequency. The real conductivity measured is not congruent with the simple Drude model, but it follows a Maxwell-Garnett model, where the nanotubes are embedded in a dielectric host. (C) 2002 American Institute of Physics.