A new hydrogen peroxide biosensor based on gold nanoelectrode ensembles/multiwalled carbon nanotubes/chitosan film-modified electrode |
| |
Authors: | Yunhui Yang Guangming Yang Yan Huang Huiping Bai Xuxiao Lu |
| |
Affiliation: | aCollege of Chemistry and Chemical Engineering, Yunnan Normal University, No. 298, 121 Street, Kunming, 650092, PR China;bKunming Medical University, Kunming, 650031, PR China |
| |
Abstract: | Gold nanoelectrode ensembles were produced by electrodeposition using multiwalled carbon nanotubes (MWNTs) as template. A new third generation amperometric biosensor for hydrogen peroxide was developed based on adsorption of horseradish peroxidase (HRP) at the glassy carbon (GC) electrode modified with Au nanoelectrode ensembles/multiwalled carbon nanotubes/chitosan film. The resulting HRP biosensor offered an excellent detection for hydrogen peroxide at −0.11 V with a linear response range of 2.08 × 10−7 to 7.6 × 10−3 M with a correlation coefficient of 0.998, and response time <5 s. The detection limit was 1.02 × 10−7 M at 3σ. The biosensor displays rapid response, expanded linear response range, and excellent repeatability. The simple and fast fabrication of the sensor makes it superior to other techniques. |
| |
Keywords: | Multiwalled carbon nanotubes Au nanoelectrode ensembles Direct electrochemistry Electrodeposition Hydrogen peroxide Biosensor |
本文献已被 ScienceDirect 等数据库收录! |
|