In situ chemo-synthesized multi-wall carbon nanotube-conductive polyaniline nanocomposites: Characterization and application for a glucose amperometric biosensor

A new glucose amperometric biosensor, based on electrodeposition of platinum nanoparticles onto the surface of multi-wall carbon nanotube (MWNT)-polyaniline (PANI) nanocomposites, and then immobilizing glucose oxidase (GOD) with covalent interaction and adsorption effect, was constructed in this pap...

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Bibliographic Details
Published in:Talanta (Oxford) 2011-07, Vol.85 (1), p.104-111
Main Authors: Zhong, Huaan, Yuan, Ruo, Chai, Yaqin, Li, Wenjuan, Zhong, Xia, Zhang, Yu
Format: Article
Language:English
Subjects:
Analytical chemistry
Aniline Compounds
Biological and medical sciences
Biosensing Techniques - methods
Biosensor
Biosensors
Biotechnology
Chemistry
Composites
Electrochemical methods
Electrodes
Enzymes, Immobilized
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
General, instrumentation
Glucose - analysis
Glucose Oxidase
Limit of Detection
Methods. Procedures. Technologies
Multi-wall carbon nanotube
Nanocomposites - chemistry
Nanotubes, Carbon - chemistry
Platinum
Platinum nanoparticles
Polyaniline
Polymerization
Reproducibility of Results
Spectrometric and optical methods
Spectrum Analysis
Various methods and equipments
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Summary:A new glucose amperometric biosensor, based on electrodeposition of platinum nanoparticles onto the surface of multi-wall carbon nanotube (MWNT)-polyaniline (PANI) nanocomposites, and then immobilizing glucose oxidase (GOD) with covalent interaction and adsorption effect, was constructed in this paper. Firstly, the MWNT-PANI nanocomposites had been synthesized by in situ polymerization and were characterized through transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, and ultraviolet and visible (UV–vis) absorption spectra. The assembled process of the modified electrode was probed by scanning electron microscopy (SEM) and cyclic voltammetry (CV). Chronoamperometry was used to study the electrochemical performance of the resulting biosensor. The glucose biosensor exhibited a linear calibration curve over the range from 3.0μM to 8.2mM, with a detection limit of 1.0μM and a high sensitivity of 16.1μAmM−1. The biosensor also showed a short response time (within 5s). Furthermore, the reproducibility, stability and interferences of the biosensor were also investigated.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2011.03.040