Electrolyte diodes and hydrogels: Determination of concentration and pK value of fixed acidic groups in a weakly charged hydrogel

Kristóf Iván, Mária Wittmann, Péter L. Simon, Zoltán Noszticzius, Jürgen Vollmer

Research output: Contribution to journalArticle

13 Citations (Scopus)


The measurement of current-voltage (CV) characteristics of polyvinyl alcohol (PVA) - glutardialdehyde hydrogel cylinders was discussed. It was found that the concentration polarization near the gel-liquid interafaces was decreased considerably by applying an intense mechanical stirring in both reservoirs. The concentration of the fixed anions was found to be determined from the slope of the line measured in 0.001 and 0.01 molar KCl solutions. Analysis shows that the boundary layers facing the cathode or the anode responded in a different way to stirring.

Original languageEnglish
Article number061402
Pages (from-to)061402-1-061402-11
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number6 1
Publication statusPublished - Dec 1 2004


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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