Electrochemical behavior of oxazoline-based plasma polymers for biosensing applications

Alexandru Gheorghiu, Daisy Yang, Iliana Delcheva, Craig Priest, Melanie MacGregor

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
48 Downloads (Pure)

Abstract

Plasma-polymerized polyoxazoline (POx) thin films offer a fast, scalable, and solvent-free method of electrode functionalization through the unique chemistry of the oxazoline ring. However, for POx to be a viable green alternative to existing surface modification approaches, the films should be able to withstand the processing steps involved in biosensing. Here, the effects that current exposure, extended incubation, and repeated electrode rinses have on the electrochemical and physical stability of polymethyloxazoline thin films are investigated. The films are observed to become more diffusive after incubation and rinse steps. While no significant changes in chemistry were observed, a marked change in nanotopography occurred after exposure to current, suggesting a change in the polymer film structure.

Original languageEnglish
Article number2200233
Number of pages14
JournalPlasma Processes and Polymers
Volume20
Issue number8
Early online date25 Apr 2023
DOIs
Publication statusPublished - Aug 2023

Keywords

  • electrochemical impedance spectroscopy
  • hydrophilic coatings
  • oxazoline
  • plasma polymerization
  • stability

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