Oxidative functionalization of carbon nanotubes in atmospheric pressure filamentary dielectric barrier discharge (APDBD)

TIT Okapalugo, P Papakonstantinou, H Murphu, JAD McLaughlin, NMD Brown

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Abstract

The surface compositional and any structural changes that occur on carbon nanotubes using air–atmospheric pressure dielectric barrier discharge (APDBD) for functionalization are investigated employing Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), X-ray diffraction (XRD), and neutron diffraction techniques. Atmospheric pressure plasmas (APP) are suggested to be particularly suitable for functionalization of aligned nanotubes, where wet chemical manipulation could damage or even destroy the highly desirable vertical alignment. In this work a detailed experimental study elucidating the effects of APDBD plasma treatment parameters (e.g. power density, discharge composition, inter-electrode gap and treatment time) on the electronic structure, physical, and chemical behaviour of carbon nanotubes has been conducted. In an atmospheric air we find an optimal oxidative functionalization of CNTs in our DBD system within few seconds (
Original languageEnglish
Pages (from-to)2951
JournalCarbon
Volume43
Issue number14
DOIs
Publication statusPublished - Nov 2005

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Keywords

  • Carbon nanotubes
  • Oxidation
  • Raman spectroscopy
  • X-ray photoelectron spectroscopy
  • X-ray diffraction

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