Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Field emission enhancement of polypyrrole due to band bending induced tunnelling in polypyrrole-carbon nanotubes nanocomposite

  • Gupta, Namita Dutta (Thin Film and Nano Science Laboratory, Department of Physics, Jadavpur University) ;
  • Maity, Supratim (Thin Film and Nano Science Laboratory, Department of Physics, Jadavpur University) ;
  • Chattopadhyay, Kalyan Kumar (Thin Film and Nano Science Laboratory, Department of Physics, Jadavpur University)
  • Received : 2013.01.24
  • Accepted : 2013.11.19
  • Published : 2014.09.25
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Abstract

Polypyrrole-multiwalled carbon nanotubes (PPy-MWCNT) nanocomposites with high field emission characteristics have been fabricated by a very simple and effective in situ chemical polymerization technique that bypasses the need of de-agglomerating the MWCNT. Based on structural characterization, we have proposed formation of a three tier structure of PPy-MWCNTs composite with granular PPy on the top. Field emission studies, explained on the basis of band bending at the PPy-MWCNT interface, show drastic increase of field enhancement factor (~4664) and low turn on field ($1.7V/{\mu}m$), opening new possibilities of improvement of PPy/PPy-MWCNT composites.

Keywords

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