Surface-modified reusable gold electrode for detection of dissolved oxygen

O. Berkh*, H. Ragones, D. Schreiber, L. Burstein, Y. Shacham-Diamand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The behavior of gold electrodes for the detection of dissolved oxygen was studied by the method of cyclic voltammetry in a phosphate-buffered solution with physiological pH. Surface modification with electropolymerized poly (o-phenylenediamine) film was performed to improve electrode antifouling properties. The voltammetric signature of oxygen was considered in terms of film electropolymerization conditions and post-deposition conditioning of the electrodes. The changes in the chemical structure of the poly (o-phenylenediamine) films as a result of these factors were confirmed by X-ray photoelectron spectroscopy analysis. Following long post-deposition conditioning in a phosphate-buffered solution, the modified electrodes exhibited stable voltammetric signatures in repeated tests and during storage as well as in the presence of a dense population of Escherichia coli (characterized by negligible metabolic activity) in the buffer. The results are indicative of the improved electrode antifouling properties.

Original languageEnglish
Pages (from-to)491-499
Number of pages9
JournalJournal of Applied Electrochemistry
Volume42
Issue number7
DOIs
StatePublished - Jul 2012

Keywords

  • Antifouling
  • Electrode modification
  • Electrode stability
  • Electropolymerization
  • Oxygen detection
  • Poly (o-phenylenediamine)

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