Low Temperature Hall Effect Investigation of Conducting Polymer-Carbon Nanotubes Composite Network

• Main Authors: Mahnaz M.Abdi, Kasra Behzad, Zainal Abidin Talib, Wan Mahmood Mat Yunus, Afarin Bahrami, Fasih Ud Din
• Format: Article
• Language: English
• Published: MDPI AG 2012-11-01
• Series: International Journal of Molecular Sciences
• Subjects: polypyrrole; carbon nanotube; Hall effect; conductivity
• Online Access: http://www.mdpi.com/1422-0067/13/11/14917
• ISSN: 1422-0067

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.