Voltammetric bahavior of ferricyanide ion-confined LbL film-coated electrodes: Use of Heparin and κ-carrageenan as film component

Shigehiro Takahashi, Takahiro Sato, Nobuhiro Haraguchi, Baozhen Wang, Jun Ichi Anzai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Heparin (HEP) and κ-carrageenan (CAR) were used for constructing thin films on the surface of a gold (Au) electrode and redox properties of ferricyanide ions, Fe(CN) 6 3-, on the film-coated electrodes were studied. HEP- and CAR-containing thin films were successfully prepared by layer-by-layer (LbL) deposition of the polysaccharides and poly(allylamine hydrochloride) (PAH). Fe(CN) 6 3- ions penetrated the LbL-deposited films to exhibit redox reactions on the Au electrodes when the outermost surface of the film was covered with PAH. On the other hand, penetration of Fe(CN) 6 3- ions was suppressed when the surface of the film was covered with HEP or CAR. The results were rationalized on the basis of electrostatic repulsion between Fe(CN) 6 3- anion and negative charges in HEP and CAR. In addition, Fe(CN) 6 3- ions were confined in the LbL films and the confined Fe(CN) 6 3- ions were successfully used for the electrocatalytic oxidation of ascorbic acid.

Original languageEnglish
Pages (from-to)6762-6770
Number of pages9
JournalInternational Journal of Electrochemical Science
Volume7
Issue number8
Publication statusPublished - 2012 Aug 1

Keywords

  • Carrageenan
  • Ferricyanide ion
  • Heparin
  • Layer-by-layer film
  • Polysaccharide

ASJC Scopus subject areas

  • Electrochemistry

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