Three dimensional film electrode prepared from oppositely charged carbon nanoparticles as efficient enzyme host

K Szot, John D Watkins, Steven D Bull, Frank Marken, M Opallo

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Three dimensional carbon film electrodes were prepared from oppositely charged carbon nanoparticles (ca. 9 to 18 nm diameter) by a layer-by-layer approach. This was done by alternative immersion of indium tin oxide plates into suspension of positively and negatively charged particles. A stable film is formed already after single immersion and withdrawal step as confirmed by scanning electron microscopy. Up to ten immersion and withdrawal steps can be used to systematically increase the amount of nanoparticulate carbon material. The capacitive current density and current density of hydrogen peroxide reduction are proportional to the number of immersion and withdrawal steps. The same can be seen for adsorbed redox active 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate). After adsorption of bilirubin oxidase into the film efficient bioelectrocatalytic dioxygen reduction is observed.
Original languageEnglish
Pages (from-to)737-739
Number of pages3
JournalElectrochemistry Communications
Volume12
Issue number6
DOIs
Publication statusPublished - Jun 2010

Keywords

  • carbon film electrode
  • carbon nanoparticles
  • layer-by-layer
  • bilirubin oxidase
  • dioxygen reduction

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