Ionically self-assembled polyelectrolyte-based carbon nanotube fibers

Sandeep Razdan, Prabir K. Patra, Swastik Kar, Lijie Ci, Robert Vajtai, Ákos Kukovecz, Zoltán Kónya, Imre Kiricsi, Pulickel M. Ajayan

Research output: Contribution to journalArticle

32 Citations (Scopus)


We present a process for synthesizing ionically self-assembled polyelectrolyte-complex-based carbon nanotube fibers using a simple noncovalent stabilization of carbon nanotube aqueous dispersions where no surface functionalizations of the nanotubes were necessary. The polyelectrolyte-carbon nanotube composite fibers have mechanical, electrical and chemical properties which make them a choice of materials in applications such as biosensors, chemical electrodes or flexible electronics. The fibers showed reasonable strength and conductivity as high as 45S/cm for single-walled carbon nanotubes and 80-90S/cm for multiwalled carbon nanotubes, due to the presence of an interconnected network of carbon nanotubes embedded inside the fibers. Fiber formationwas demonstrated for a variety of strong polyelectrolyte combinations, including a conductive fiber matrix consisting of poly (ethylenedioxythiophene) (PEDOT), with the presence of nanotubes causing a 2 orders of magnitude increase in the conductivity of the base polymer. The self-assembled polyelectrolyte-carbon nanotube fibers have potential applications in biosensing and flexible electronics.

Original languageEnglish
Pages (from-to)3062-3071
Number of pages10
JournalChemistry of Materials
Issue number14
Publication statusPublished - Jul 28 2009

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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