| Abstract
| - Conducting polypyrrole (PPy) powder synthesized by using FeCl3 × 6 H2O and/or Fe(NO3)3 oxidants wasimpregnated in silver salt solutions. The stability and decomposition of the material was followed bythermogravimetric measurements. The total silver content was determined by atom absorption spectroscopy(ICP-AAS). The heat and electric conductivities of the composites were measured and correlated with thesilver content. The incorporated silver was speciated and measured by X-ray diffraction (XRD). The spectraproved that the chemical state of the silver incorporated into the composite depends on the anion used in thepolymerization process. In the case of the polymerization in a nitrate ion containing solution, the impregnationleads exclusively to the formation of metallic silver. The size distribution of the AgCl and Ag nanoparticles,determined from transmission electron microscopy (TEM) pictures in the different composites, proves theformation of a rather uniform species below 10 and 7 nm, respectively. The observations can be correlatedwith the different interactions in the PPy-chloride/nitrate-silver systems. The redox type interaction basedconclusions can be considered as a guide during the preparation of other metal-conducting polymer composites.
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