Self-selective separation of single-walled carbon nanotubes via a hydroxyl group reaction

Kon Yi Heo, Keun Woo Lee, Kyung Min Kim, Hyun Jae Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We developed a method of separating metallic single-walled carbon nanotubes (SWNTs) from semiconducting nanotubes (NTs) in suspension using a sodium hydroxide treatment and centrifugation. The semiconducting NTs remained suspended in the solvent while the metallic NTs precipitated out. This self-selective separation occurred because the metallic SWNTs bonded to hydroxyl groups due to strong surface hydrogen-bond interactions. We fabricated thin-film transistors based on random networks of semiconducting SWNTs on a glass substrate and obtained an on/off current ratio of 6.25 × 10 4.

Original languageEnglish
Pages (from-to)K71-K73
JournalElectrochemical and Solid-State Letters
Volume12
Issue number12
DOIs
Publication statusPublished - 2009 Oct 22

Fingerprint

Single-walled carbon nanotubes (SWCN)
Hydroxyl Radical
Nanotubes
nanotubes
carbon nanotubes
Sodium Hydroxide
Centrifugation
sodium hydroxides
Thin film transistors
Suspensions
Hydrogen bonds
transistors
Sodium
hydrogen bonds
Glass
glass
Substrates
thin films
interactions

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

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Self-selective separation of single-walled carbon nanotubes via a hydroxyl group reaction. / Heo, Kon Yi; Lee, Keun Woo; Kim, Kyung Min; Kim, Hyun Jae.

In: Electrochemical and Solid-State Letters, Vol. 12, No. 12, 22.10.2009, p. K71-K73.

Research output: Contribution to journalArticle

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AB - We developed a method of separating metallic single-walled carbon nanotubes (SWNTs) from semiconducting nanotubes (NTs) in suspension using a sodium hydroxide treatment and centrifugation. The semiconducting NTs remained suspended in the solvent while the metallic NTs precipitated out. This self-selective separation occurred because the metallic SWNTs bonded to hydroxyl groups due to strong surface hydrogen-bond interactions. We fabricated thin-film transistors based on random networks of semiconducting SWNTs on a glass substrate and obtained an on/off current ratio of 6.25 × 10 4.

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