Conducting polymer functionalized multi-walled carbon nanotubes with noble metal nanoparticles: Synthesis, morphological characteristics and electrical properties

We report the synthesis of conducting polyaniline-functionalized multi-walled carbon nanotubes (MWCNTs- f-PANI) containing noble metal (Au and Ag) nanoparticles composites (MWCNTs- f-PANI-Au or Ag-NC). MWCNTs- f-PANI was initially synthesized by functionalizing acyl chloride terminated carbon nanotu...

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Bibliographic Details
Published in:Synthetic metals 2009-04, Vol.159 (7), p.595-603
Main Authors: Reddy, Kakarla Raghava, Sin, Byung Cheol, Ryu, Kwang Sun, Kim, Jin-Chun, Chung, Hoeil, Lee, Youngil
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotubes
Composites
Conducting polymer
Exact sciences and technology
Forms of application and semi-finished materials
Functionalization
Metal nanoparticles
Nanocomposites
Polymer industry, paints, wood
Technology of polymers
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Summary:We report the synthesis of conducting polyaniline-functionalized multi-walled carbon nanotubes (MWCNTs- f-PANI) containing noble metal (Au and Ag) nanoparticles composites (MWCNTs- f-PANI-Au or Ag-NC). MWCNTs- f-PANI was initially synthesized by functionalizing acyl chloride terminated carbon nanotubes (MWCNTs-COCl) with 2,5-diaminobenzenesulphonic acid (DABSA) via amide bond formation, followed by surface initiated in situ chemical oxidative graft polymerization of aniline in the presence of the ammonium persulphate (APS) as an oxidizing agent. MWCNTs- f-PANI was then dispersed into an aqueous Au or Ag metal salt solution followed by the addition of sodium citrate, which acted as a reducing agent. The resulting composite contained a high level of well dispersed Au or Ag nanoparticles (MWCNTs- f-PANI/Au-NC or MWCNTs- f-PANI-Ag-NC). Morphological and structural characteristics, as well as electrical conducting properties of the hybrid nanocomposites were characterized using various techniques including high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–visible spectroscopy (UV–vis) and four-probe measurements. FT-IR spectra confirmed that PANI was covalently bonded to MWCNTs. TEM images revealed the presence of Au or Ag nanoparticles finely dispersed in the composites with a size of
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2008.11.030