Abstract
We have used the technique of scanning probe microscopy in the noncontact mode to investigate the nanometer-scale domain structure of electropolymerized polyaniline thin films. While undoped polyaniline films are structurally amorphous, doped, conductive polyaniline films exhibit a structure consisting of close-packed nanometer-scale domains. Using modified effective medium theory, it is possible to accurately predict the conductivity of these films using a model based on the size distribution of individual conducting domains within the material. Dipole–dipole interactions between conducting domains as well as size-induced metal insulator transition effects must be included in this model in order to fully account for the observed macroscopic conductivity.
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Schedule a callMore From: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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