Selective removal of metallic SWNTs using microwave radiation

J. W. Song, H. W. Seo, J. K. Park, J. E. Kim, D. G. Choi, Chang-Soo Han

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)725-728
Number of pages4
JournalCurrent Applied Physics
Volume8
Issue number6
DOIs
Publication statusPublished - 2008 Oct 1
Externally publishedYes

Fingerprint

Nanotubes
Microwaves
microwaves
nanotubes
Powders
Microwave ovens
carbon nanotubes
electromagnetic spectra
ovens
Infrared radiation
Radiation
radio frequencies
purity
frequency ranges
Sensors
sensors
radiation
electronics
energy

Keywords

  • Microwave
  • Selective removal
  • SWNT

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science (miscellaneous)

Cite this

Selective removal of metallic SWNTs using microwave radiation. / Song, J. W.; Seo, H. W.; Park, J. K.; Kim, J. E.; Choi, D. G.; Han, Chang-Soo.

In: Current Applied Physics, Vol. 8, No. 6, 01.10.2008, p. 725-728.

Research output: Contribution to journalArticle

Song, J. W. ; Seo, H. W. ; Park, J. K. ; Kim, J. E. ; Choi, D. G. ; Han, Chang-Soo. / Selective removal of metallic SWNTs using microwave radiation. In: Current Applied Physics. 2008 ; Vol. 8, No. 6. pp. 725-728.
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