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Direct Electrochemistry of Glucose Oxidase at Carbon Nanotube‐gold Colloid Modified Electrode with Poly(diallyldimethylammonium chloride) Coating
Author(s) -
Yao YanLi,
Shiu KwokKeung
Publication year - 2008
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.200804209
Subject(s) - glucose oxidase , amperometry , carbon nanotube , electrochemistry , electrode , biosensor , glassy carbon , colloid , materials science , colloidal gold , coating , chemical engineering , chloride , gold colloid , inorganic chemistry , nuclear chemistry , chemistry , nanotechnology , cyclic voltammetry , organic chemistry , nanoparticle , metallurgy , engineering
Glucose oxidase showed direct electrochemical transfer at glassy carbon electrodes immobilized with carbon nanotube‐gold colloid (CNT‐Au) composites with poly(diallydimethylammonium chloride) (PDDA) coatings. The modified electrode (GC/CNT/Au/PDDA‐GOD) was employed for the amperometric determination of glucose. Under optimal conditions, the biosensor displayed linear response to glucose from 0.5 to 5 mM with a sensitivity of 2.50 mA M −1 at an applied potential of −0.3 V (vs. Ag|AgCl reference).