Anisotropic polarizability of isolated semiconducting single-wall carbon nanotubes in alternating electric fields

被引：16
|
作者：
Fagan, J. A. [1 ]
Bajpai, V. [1 ]
Bauer, B. J. [1 ]
Hobbie, E. K. [1 ]
机构：
[1] NIST, Div Polymers, Gaithersburg, MD 20899 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 21期
关键词：
D O I：
10.1063/1.2807850
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We measure the linear dichroism for aqueous suspensions of isolated semiconducting single-wall carbon nanotubes (SWCNTs) in alternating electric fields. The field-induced alignment of length-purified SWCNTs is determined from the anisotropy of the first and second interband optical transitions for the (6,5) semiconducting species. At 3 kHz, the effective anisotropic polarizability of the DNA-wrapped SWCNTs is of order 10(-28) F m(2), comparable to that of a high-aspect-ratio conducting rod, but a factor of 5 larger than that of gold colloidal rods and an order of magnitude larger than that of tobacco mosaic virus. (C) 2007 American Institute of Physics.
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页数：3
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