Enrichment of single-walled carbon nanotubes by diameter in density gradients

被引：431
作者：
Arnold, MS [1 ]
Stupp, SI [1 ]
Hersam, MC [1 ]
机构：
[1] Northwestern Univ, Feinberg Sch Med, Dept Mat Sci & Engn, Dept Chem, Evanston, IL 60208 USA
来源：
NANO LETTERS | 2005年 / 5卷 / 04期
关键词：
D O I：
10.1021/nl050133o
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The bulk enrichment and separation of single-walled carbon nanotubes (SWNTs) by diameter has been achieved through ultracentrifugation of DNA-wrapped SWNTs in aqueous density gradients. The separation is identified by the visual formation of colored bands of SWNTs in the density range of 1.11-1.17 g cm(-3). The optical absorbance spectra of the separated SWNTs indicate that SWNTs of decreasing diameter are increasingly more buoyant. This nondestructive and scalable separation strategy is expected to impact the fields of molecular electronics, optoelectronics, and sensing where SWNTs of a monodisperse band gap are essential.
引用
收藏
页码：713 / 718
页数：6
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