Continuous extraction of highly pure metallic single-walled carbon nanotubes in a microfluidic channel

Dong Hun Shin, Ji Eun Kim, Hyung Cheoul Shim, Jin Won Song, Ju Hyung Yoon, Joondong Kim, Sohee Jeong, Junmo Kang, Seunghyun Baik, Chang Soo Han

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Highly pure metallic single-walled carbon nanotubes were continuously extracted from a mixture of semiconducting and metallic species using a nondestructive, scalable method. Two laminar streams were generated in an H-shaped microfluidic channel with two inlets and two outlets. The flow conditions were carefully controlled to minimize diffusive and convective transport across the boundary between the two flows. Dielectrophoretic force from the embedded electrode at the junction extracted metallic nanotubes from a stream of nanotube suspension toward the other stream of buffer solution without nanotubes. The highly pure metallic and enriched semiconducting nanotubes were obtained simultaneously at each outlet using this novel approach. Excellent selectivity was verified by electrical transport measurement, absorption, and Raman spectroscopic analysis.

Original languageEnglish
Pages (from-to)4380-4385
Number of pages6
JournalNano Letters
Volume8
Issue number12
DOIs
Publication statusPublished - 2008 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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  • Cite this

    Shin, D. H., Kim, J. E., Shim, H. C., Song, J. W., Yoon, J. H., Kim, J., Jeong, S., Kang, J., Baik, S., & Han, C. S. (2008). Continuous extraction of highly pure metallic single-walled carbon nanotubes in a microfluidic channel. Nano Letters, 8(12), 4380-4385. https://doi.org/10.1021/nl802237m