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Electrochemical and surface characterization of pH sensor based on bisulfate‐doped poly(pyrrole)
Author(s) -
Jovanovic Vladislava M.,
Dekanski Aleksander,
Vlajnic Goran,
Jovanovic Momir S.
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140090712
Subject(s) - characterization (materials science) , electrochemistry , electrochemical gas sensor , pyrrole , doping , materials science , chemistry , chemical engineering , nanotechnology , electrode , organic chemistry , optoelectronics , engineering
Pyrrole was electrochemically polymerized on glassy carbon support in NaHSO 4 solutions under different conditions (method applied, concentration of monomer, concentration of the main solution, thickness of the film). These variables were used to study the preparation effect on the resulting properties, in particular on the potentiometric response of the PPy‐HSO 4 electrodes. The electrodes were characterized by cyclic voltammetry, as well as by STM and AES techniques. Utilities of the polymer application as a sensor were studied by direct potentiometric measurements. The results obtained show that poly(pyrrole) doped with bisulfate ions can serve as pH sensor, with the slope of E/pH curves approaching the theoretical value.