title: Carbon nanotube/polysulfone composite screen-printed electrochemical enzyme biosensors.
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 H(2)O(2) biosensor exhibited a linear range (applied potential, -0.2 V) from 0.02 to 0.5 mM and a K(M)(app) of 0.71 mM.
authors.affiliation: Grup de Sensors i Biosensors, Universitat Autònoma de Barcelona, 08113 Bellaterra, Barcelona, Spain.
authors.forename: Samuel
authors.initials: S
authors.lastname: Sánchez
authors.forename: Martin
authors.initials: M
authors.lastname: Pumera
authors.forename: Enric
authors.initials: E
authors.lastname: Cabruja
authors.forename: Esteve
authors.initials: E
authors.lastname: Fàbregas
mesh_terms: D015374:Biosensing Techniques; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon; D011108:Polymers; D013450:Sulfones
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers; D013450:Sulfones; C017662:polysulfone P 1700