Nano Archive

Glucose biosensor based on immobilization of glucose oxidase in poly(o-aminophenol) film on polypyrrole-Pt nanocomposite modified glassy carbon electrode

Li, Jing and Lin, Xiangqin (2007) Glucose biosensor based on immobilization of glucose oxidase in poly(o-aminophenol) film on polypyrrole-Pt nanocomposite modified glassy carbon electrode. BIOSENSORS & BIOELECTRONICS, 22 (12, Sp. Iss. SI). pp. 2898-2905.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

Novel Pt nanoclusters embedded polypyrrole nanowires (PPy-Pt) composite was electrosynthesized on a glassy carbon electrode, denoted as PPy-Pt/GCE. A glucose biosensor was further fabricated based on immobilization of glucose oxidase (GOD) in an electropolymerized non-conducting poly(o-aminophenol) (POAP) film that was deposited on the PPy-Pt/GCE. The morphologies of the PPy nanowires and PPy-Pt nanocomposite were characterized by field emission scanning electron microscope (FE-SEM). Effect of experimental conditions involving the cycle numbers for POAP deposition and Pt nanoclusters deposition, applied potential used in glucose determination, temperature and pH value of the detection solution were investigated for optimization. The biosensor exhibited an excellent current response to glucose over a wide linear range from 1.5 × 10−6 to 1.3 × 10−2 M (r = 0.9982) with a detection limit of 4.5 × 10−7 M (s/n = 3). Based on the combination of permselectivity of the POAP and the PPy films, the sensor had good anti-interference ability to ascorbic acid (AA), uric acid (UA) and acetaminophen. The apparent Michaelis–Menten constant (Km) and the maximum current density (Im) were estimated to be 23.9 mM and 378 μA/cm2, respectively. In addition, the biosensor had also good sensitivity, stability and reproducibility.

Item Type:Article
Uncontrolled Keywords:polypyrrole nanowires; platinum nanoclusters; composite; poly(o-aminophenol); glucose biosensor; electrochemical deposition
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Bio materials
Material Science > Nanochemistry
ID Code:2598
Deposited By:Anuj Seth
Deposited On:27 May 2009 12:08
Last Modified:27 May 2009 12:08

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