Construction of amperometric immunosensors based on the electrogeneration of a permeable biotinylated polypyrrole film

Rodica E. Ionescu, Chantal Gondran, Levi A. Gheber, Serge Cosnier, Robert S. Marks

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

The construction of amperometric immunosensors to cholera antitoxin immunoglobulins were shown to have improved sensitivity when the cholera toxin B subunit biorecognition entity was linked to an electrogenerated biotinylated polypyrrole film copolymerized with pyrrolelactobionamide monomer. The copolymer exhibits greater film permeability than biotinylated polypyrrolic or polyphenolic films for the permeation of electroactive species. Hence, when the presence of the HRP marker of the immunoassay was determined using hydroquinone, the production of electroactive quinone was shown to permeate faster to the electrode, thus providing a faster response time.

Original languageEnglish
Pages (from-to)6808-6813
Number of pages6
JournalAnalytical Chemistry
Volume76
Issue number22
DOIs
StatePublished - 15 Nov 2004

ASJC Scopus subject areas

  • Analytical Chemistry

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