Chemical modification of multiwalled carbon nanotubes by vacuum ultraviolet irradiation dry process

Koji Asano, Daiyu Kondo, Akio Kawabata, Fumio Takei, Mizuhisa Nihei, Yuji Awano

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We developed a fast dry oxidation process for chemical vapor deposition (CVD) grown multiwalled carbon nanotubes (MWNTs) using short-wavelength UV [vacuum ultraviolet (VUV) light (λmax = 172 nm)] irradiation. We introduced carboxyl groups as many as 3% of carbon atoms within l min at room temperature using this process. MWNTs with the carboxyl groups were analyzed by attenuated total reflection (ATR) Fourier transform infrared absorption spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The attachment of the carboxyl groups was further confirmed by reacting ferritin molecules with the MWNTs. The developed dry process with a high reaction rate is a powerful tool for the applications of carbon nanotubes in nanoelectronics.

Original languageEnglish
Pages (from-to)3573-3576
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number4 B
Publication statusPublished - 2006 Apr 25
Externally publishedYes



  • Carboxyl group
  • Chemical modification
  • Dry process
  • Multiwalled carbon nanotube
  • Reaction rate
  • Vacuum ultraviolet (VUV)

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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