ELECTRICAL-PROPERTIES OF ORGANIZED ASSEMBLIES OF POLYPYRROLE FABRICATED CHEMICALLY ON A COPPER STEARATE TEMPLATE IN LANGMUIR-BLODGETT-FILMS

The electrical properties of Langmuir-Blodgett films of polypyrrole fa bricated on a copper stearate template have been studied. The films ex hibit domains of a highly organized two-dimensional linear array of po lypyrrole granules sandwiched between insulating fatty acid layers tog ether with some disorganized domains. The measured in-plane conductivi ty does not show any appreciable anisotropy and is as high as 1.2 S cm (-1) with a thermal activation energy of 0.15 eV. The transverse condu ctivity of the film in a metal-insulator-metal structure is shown to b e Poole-Frenkel emission-limited and has a value of the order of 10(-8 ) S cm(-1) in the low-field region. The film then shows a high degree of conductivity anisotropy.