Carbon nanotube/polysulfone composite screen-printed electrochemical enzyme biosensors

Samuel Sánchez, Martin Pumera, Enric Cabruja, Esteve Fàbregas

Research output: Contribution to journalArticleResearchpeer-review

71 Citations (Scopus)

Abstract

The fabrication, evaluation and attractive performance of multiwall carbon nanotube(MWCNT)/polysulfone biocomposite membrane modified thick-film screen-printed electrochemical biosensors are reported. The fabricated carbon nanotube/polysulfone (CNT/PS) strips combine the attractive advantages of carbon nanotube materials, polysulfone matrix and disposable screen-printed electrodes. Such thick-film carbon nanotubes/polysulfone sensors have a well defined performance, are mechanically stable, and exhibit high electrochemical activity. Furthermore, biocompatibility of CNT/PS composite allows easy incorporation of biological functional moiety of horseradish peroxidase by phase inversion technique. The comparison of graphite with MWCNT as conductor material is described in this paper. The proposed H2O2 biosensor exhibited a linear range (applied potential, -0.2 V) from 0.02 to 0.5 mM and a KMapp of 0.71 mM. © The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)142-147
JournalAnalyst
Volume132
Issue number2
DOIs
Publication statusPublished - 1 Feb 2007

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