Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559537 | Talanta | 2011 | 6 Pages |
Abstract
Ordered mesoporous carbon-Au nanoparticles (OMC-Au) nanocomposites were synthesized by a one-step chemical reduction route. Due to the large surface area and high conductivity of OMC, good biocompatibility of OMC and Au nanoparticles, a mediator-free glucose biosensor was fabricated by immobilizing glucose oxidase (GOD) on the OMC-Au nanocomposites modified glassy carbon (GC) electrode. Direct electron transfer between GOD and the electrode was achieved and the electron transfer rate constant (ks) was calculated to be 5.03Â sâ1. The Michalis-Menten constant (KMapp) value of GOD immobilized on the OMC-Au/GC electrode surface was found to be 0.6Â mM. The glucose biosensor exhibits a linear range from 0.05 to 20.0Â mM. This biosensor also shows good reproducibility, excellent stability and the negligible interferences from ascorbic acid and uric acid.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Lixia Wang, Jing Bai, Xiangjie Bo, Xiaoliang Zhang, Liping Guo,