Magnetic nanoparticle-based separation of metallic and semiconducting carbon nanotubes

Hyung Joon Kim, Sungsic Hwang, Jeseung Oh, Young Wook Chang, Eun Kyung Lim, Seungjoo Haam, Chul Sung Kim, Kyung Hwa Yoo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We report a simple and scalable method for the separation of semiconducting single-walled carbon nanotubes (SWNTs) from metallic SWNTs using magnetic nanoparticles (MNPs) functionalized with polycationic tri-aminated polysorbate 80 (TP80). MNPs-TP80 are selectively adsorbed on acid-treated semiconducting SWNTs, which makes the semiconducting SWNTs be highly concentrated to over 95% under a magnetic field. Almost all the field effect transistor network devices, which were fabricated using separated semiconducting SWNTs, exhibited a p-type semiconducting behavior with an on/off ratio of higher than 104.

Original languageEnglish
Article number045703
Issue number4
Publication statusPublished - 2011 Jan 28

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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