Low temperature hall effect investigation of conducting polymer-carbon nanotubes composite network

Int J Mol Sci. 2012 Nov 14;13(11):14917-28. doi: 10.3390/ijms131114917.


Polypyrrole (PPy) and polypyrrole-carboxylic functionalized multi wall carbon nanotube composites (PPy/f-MWCNT) were synthesized by in situ chemical oxidative polymerization of pyrrole on the carbon nanotubes (CNTs). The structure of the resulting complex nanotubes was characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The effects of f-MWCNT concentration on the electrical properties of the resulting composites were studied at temperatures between 100 K and 300 K. The Hall mobility and Hall coefficient of PPy and PPy/f-MWCNT composite samples with different concentrations of f-MWCNT were measured using the van der Pauw technique. The mobility decreased slightly with increasing temperature, while the conductivity was dominated by the gradually increasing carrier density.

MeSH terms

  • Cold Temperature*
  • Electric Conductivity*
  • Nanocomposites / chemistry*
  • Nanotubes, Carbon / chemistry*
  • Polymers / chemistry*


  • Nanotubes, Carbon
  • Polymers