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|Type:||Artigo de periódico|
|Title:||THE ROLE OF ION-EXCHANGE IN THE REDOX PROCESSES OF POLYPYRROLE DODECYL-SULFATE FILMS AS STUDIED BY ELECTROGRAVIMETRY USING A QUARTZ CRYSTAL MICROBALANCE|
|Abstract:||The electrochemical redox mechanism of a dodecyl sulfate-doped polypyrrole was studied in detail by electrogravimetry using a quartz crystal microbalance. In order to distinguish the nature of the inserted/deinserted species, different salts were used as aqueous electrolytes. A quantitative analysis of the results indicated that the surfactant counter anion was trapped in the polymer matrix and that both anions and cations of the electrolyte play an important role in the redox processes. Quantitative calculations showed that the hydration sphere of these ions must be taken into account when dealing with the redox processes of conductive polymers adhered to the surface of electrodes.|
|Editor:||Elsevier Science Sa Lausanne|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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