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 journalArticlepeer-review

4 Citations (Scopus)


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
Issue number12
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

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


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