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New Robust Redox and Conducting Polymer Modified Electrodes for Ascorbate Sensing and Glucose Biosensing
Author(s) -
Kakhki Somayeh,
Barsan Madalina M.,
Shams Esmaeil,
Brett Christopher M. A.
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200402
Subject(s) - biosensor , pedot:pss , glucose oxidase , electrode , redox , electrochemistry , glassy carbon , conductive polymer , materials science , ascorbic acid , chemistry , polymer , methylene blue , nuclear chemistry , combinatorial chemistry , chemical engineering , inorganic chemistry , nanotechnology , cyclic voltammetry , organic chemistry , catalysis , food science , photocatalysis , engineering
A novel modified electrode with a conducting film containing poly(3,4‐ethylenedioxythiophene) (PEDOT) plus poly(methylene blue) (PMB) on a glassy carbon electrode (GCE) (PEDOT/PMB/GCE) has been developed, and application illustrated as electrochemical sensor for ascorbate and biosensor for glucose. Electrocatalytic oxidation at 0.0 V vs. SCE was successfully used for the determination of ascorbate in real samples. Glucose biosensors containing glucose oxidase (GOx) immobilized on PMB/PEDOT electrodes exhibit enhanced sensitivity relative to PEDOT ones. The new robust biosensor architecture shows a far superior operational and storage stability relative to PMB alone, enabling excellent preservation of enzyme activity during more than one month.