title: Low temperature hall effect investigation of conducting polymer-carbon nanotubes composite network.
abstract: 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.
authors.affiliation: Department of Physics, Faculty of Science, University Putra Malaysia, Serdang 43400, Malaysia. zainalat@science.upm.edu.my.
authors.forename: Afarin
authors.initials: A
authors.lastname: Bahrami
authors.forename: Zainal Abidin
authors.initials: ZA
authors.lastname: Talib
authors.forename: Wan Mahmood Mat
authors.initials: WM
authors.lastname: Yunus
authors.forename: Kasra
authors.initials: K
authors.lastname: Behzad
authors.forename: Mahnaz
authors.initials: M
authors.lastname: M Abdi
authors.forename: Fasih Ud
authors.initials: FU
authors.lastname: Din
mesh_terms: D003080:Cold Temperature; D004553:Electric Conductivity; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers