Low-cost and ultra-strong p-type doping of carbon nanotube films by a piranha mixture

Hosea Tantang*, Jinchong Xiao, Jun Wei, Mary Bee Eng Chan-Park, Lain-Jong Li, Qichun Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Recent studies have demonstrated that single-walled carbon nanotube (SWCNT) films can be doped by a nitric/sulfuric acid treatment to significantly improve its conductivity. However, the sheet resistance is still too high for many applications. Here we report on a simple treatment using a piranha mixture that could further enhance SWCNT film conductivity. The high redox potentials of hydrogen peroxides combined with the acidity of sulfuric acid enabled strong p-doping of the carbon nanotube films. Absorption peak suppression and a G-band shift provided proof of strong p-doping of the SWCNT films.

Original languageEnglish (US)
Pages (from-to)4182-4186
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number27
DOIs
StatePublished - Sep 1 2011

Keywords

  • Carbon
  • Conducting materials
  • Doping
  • Nanotubes
  • Piranha mixture

ASJC Scopus subject areas

  • Inorganic Chemistry

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