Electrochemical actuator based on monolithic polypyrrole-TiO2 nanoparticle composite film

Ximin He, Gaoquan Shi

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


A polypyrrole (PPy) composite film with a pure PPy zone and a PPy-TiO2 nanoparticle composite zone in its cross-sectional direction was synthesized by direct oxidation of pyrrole successively in an electrolyte with or without TiO2 nanoparticles. The volume content of TiO2 in the composite film was tested to be lower than 0.9%. The actuator fabricated from this monolithic PPy film bends uniformly in two directions with a maximum bending angle larger than 90° and has a high response rate (∼115° s-1 at 1.0 V versus SCE) and a long lifetime (>20,000 cycles) in a 1 M LiClO4 aqueous solution. The high performance of this actuator resulted from the non-delamination and intrinsic asymmetric structure and the high conductivity of PPy film.

Original languageEnglish (US)
Pages (from-to)488-493
Number of pages6
JournalSensors and Actuators, B: Chemical
Issue number1
StatePublished - May 23 2006


  • Electrochemistry
  • Nanocomposites
  • Polypyrroles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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