Determination of the morphology of conducting polymers with scanning tunneling microscopy and atomic force microscopy

K. G. Loh, R. J.D. Miller, H. A. Mizes, E. M. Conwell, N. Theophilou, A. G. MacDiarmid, G. Arbuckle

Research output: Contribution to journalConference articlepeer-review


Charge transport in conducting polymers depends not only on the intrinsic feature of the polymer chains, but also on three-dimensional features, such as interchain coupling, dopant inhomogeneities, and fibril structure. The scanning tunneling microscope and the atomic force microscope can be used to study these and other effects for conducting polymers in both their doped and undoped states. In particular, for polyacetylene we have resolved the 500 angstrom fibrils of the Naarman-Theophilou (N-T) polyacetylene and the 100 angstrom fibrils of thin films of Shirakawa polyacetylene. Upon doping, the N-T polyacetylene shows bumps with a typical area of 0.2 square microns, which may be attributed to inhomogeneous doping. The fibrils of the Shirakawa films are seen to have flat terraces. We have observed periodic structure on a terrace which may be due to either dopant arrangment in the fibril or to local chain deformations.

Original languageEnglish (US)
Pages (from-to)77
Number of pages1
JournalSynthetic Metals
Issue number1-2
StatePublished - 1991
Externally publishedYes
EventProceedings of the International Conference on Science and Technology of Synthetic Metals - ICSM '90 - Tuebingen, Ger
Duration: Sep 2 1990Sep 7 1990

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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