Electrical and surface properties of clay-conducting polymer composites

M. P. Eastman, M. E. Hagerman, T. L. Porter, R. A. Parnell, J. L. Attuso, M. Bradley, D. Thompson

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

Organic guests such as aniline, pyrrole and thiophene polymerize on the surface and in the intergallery regions of smectite clays which contain exchangeable transition metal cations such as Cu2+ and Fe 3+. We monitor these reactions in thin films of smectite clays using electron spin resonance (ESR) and impedance spectroscopies. Polymers that form on the surface and in the interlayer region are studied by scanning force microscopy (SFM). ESR studies have shown that the transition metal ions are reduced during the polymerization process. Impedance measurements indicate that the formation of conducting polymer in the interlayer region of dry, Cu 2+ exchanged hectorite thin films results in a dramatic reduction in observed impedance. SFM scans indicate that the conducting polymers can adopt a variety of morphologies on the surfaces of the films and within the intergalleries of the host framework. These studies have applications in the development of advanced materials including microsensors and novel nanocomposites.

Original languageEnglish (US)
Pages (from-to)58-77
Number of pages20
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3227
DOIs
StatePublished - Dec 1 1997
EventInteractive Paper - Guadalajara, Mexico
Duration: Oct 20 1996Oct 20 1996

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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