Direct Electrochemistry of Glucose Oxidase at Carbon Nanotube‐gold Colloid Modified Electrode with Poly(diallyldimethylammonium chloride) Coating |
| |
| Authors: | Yan‐Li Yao Kwok‐Keung Shiu |
| |
| Institution: | Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong |
| |
| Abstract: | 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). |
| |
| Keywords: | Carbon nanotubes Gold nanoparticles Poly(diallyldimethylammonium chloride) Glucose biosensor Direct electrochemistry |
|
