A route for bulk separation of semiconducting from metallic single-wall carbon nanotubes

被引：469

作者：

Chattopadhyay, D ^{[1
]}

Galeska, L ^{[1
]}

Papadimitrakopoulos, F ^{[1
]}

机构：

[1] Univ Connecticut, Dept Chem, Polymer Program, Inst Mat Sci,Nanomat Optoelect Lab, Storrs, CT 06269 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 11期

关键词：

D O I：

10.1021/ja028599l

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Substantial separation of single-wall carbon nanotubes (SWNTs) according to type (metallic versus semiconducting) has been achieved for HiPco and laser-ablated SWNTs. We presently argue that stable dispersions of SWNTs with octadecylamine (ODA) in tetrahydrofuran (THF) originate from the physisorption and organization of ODA along the SWNT sidewalls in addition to the originally proposed zwitterion model. Furthermore, the reported affinity of amine groups for semiconducting SWNTs, as opposed to their metallic counterparts, contributes additional stability to the physisorbed ODA. This provides a venue for the selective precipitation of metallic SWNTs upon increasing dispersion concentration, as indicated by Raman investigations.

引用

页码：3370 / 3375

页数：6

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