 |
 |
 |
Journal articles
A glucose biosensor based on modified-enzyme incorporated within electropolymerised poly(3,4-ethylenedioxythiophene) (PEDT) films
Abstract : We have constructed and characterised a glucose sensor using glucose oxidase (GOD) covalently attached to carboxylic acid polyethyleneglycol (PEG), called (PEG–GOD). This modified enzyme was entrapped afterwards within poly(3,4-ethylenedioxythiophene) (PEDT) films electrogenerated on glassy carbon (GC) electrodes. The composite (PEG–GOD/PEDT) film is more porous than the film without enzyme (PEDT+PEG). Data from electrochemical quartz microbalance (ECQM) and pH-stat experiments indicate a good relative activity of the modified enzyme, ca. 12–15%. Amperometric measurements, using ferrocenemethanol as the redox mediator, confirms that the modified enzyme is catalytically active. The effect of film thickness was also investigated. The sensitivities were quite similar for modified-GOD electrodes (ca. 3 mA cm−2 M−1) and unmodified-GOD electrodes (ca. 2.7 mA cm−2 M−1) but a better stability was obtained with modified PEG–GOD electrodes.
Cited literature [23 references]
https://hal-emse.ccsd.cnrs.fr/emse-00527308
Contributor : Andrée-Aimée Toucas <>
Submitted on : Tuesday, January 11, 2011 - 5:26:28 PM
Last modification on : Friday, August 14, 2020 - 3:24:03 PM
Long-term archiving on: : Tuesday, April 12, 2011 - 2:25:48 AM
Contributor : Andrée-Aimée Toucas <>
Submitted on : Tuesday, January 11, 2011 - 5:26:28 PM
Last modification on : Friday, August 14, 2020 - 3:24:03 PM
Long-term archiving on: : Tuesday, April 12, 2011 - 2:25:48 AM
File
SF-JEC-512-orig.pdf
Files produced by the author(s)