Selective removal of metallic SWNTs using microwave radiation

被引：36

作者：

Song, J. W. ^{[1
]}

Seo, H. W. ^{[1
]}

Park, J. K. ^{[1
]}

Kim, J. E. ^{[1
]}

Cho, D. G. ^{[1
]}

Han, C. S. ^{[1
]}

机构：

[1] Nanomech Syst Res Ctr, Korea Inst Machinery & Mat, Taejon 305343, South Korea

来源：

CURRENT APPLIED PHYSICS | 2008年 / 8卷 / 06期

关键词：

SWNT; selective removal; microwave;

D O I：

10.1016/j.cap.2007.04.055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report new method for selectively removing the metallic CNTs from semiconducting CNTs in a powder using high-power microwave radiation in the infrared and radio frequency range of the electromagnetic spectrum. SWNTs in a powder film were heated in a 2.5 GHz microwave oven for a few minutes, and the metallic nanotubes burned more rapidly than the semiconducting nanotubes. Raman data showed that the ratio of metallic to semiconducting nanotubes decreased dramatically after exposure to microwave radiation. Using their more rapid absorption of the radiation energy of the microwaves, we achieved the selective removal of metallic SWNTs from semiconducting SWNTs. This method results in the high-purity of semiconducting SWNTs necessary for sensor and electronic applications. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：725 / 728

页数：4

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