The electropolymerization of furan, pyrrole and thiophene in strong basic media was mathematically described. Two models for the cases of the insoluble and soluble anodes were described and analyzed by using the linear stability theory and bifurcation analysis and compared with the models for other cases of electropolymerization. The causes for the oscillatory behavior, monotonic instabilities and steady-state stability conditions were found.
Recibido para evaluación: 20 de noviembre de 2013. Aceptado para publicación: 29 de mayo de 2014. Resumo O desempenho de sensores e biossensores de pH, baseados nos polímeros condutores, usados no modo de voltagem constante para medir o pH da cavidade bucal, foi descrito matematicamente. Por meio da análise do respetivo modelo, foram inferidas as condições da melhor precisão do indicador, da multiplicidade de estado estacionário e do comportamento oscilatório em parâmetro eletroquímico. Palavras-chave: potencial de hidrogênio, sensores eletroquímicos, polímeros condutores, comportamento oscilatório, estado estacionário estável.
described and the mathematical models were analyzed by linear stability theory and bifurcation analysis. Comparing the models, the influence of pH on the electrodes' behavior was evaluated.
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