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Fabrication of Electrochemical Microbial Biosensor Based on MWNT Supports Prepared by Radiation-Induced Graft Polymerization  

Shin, Soo-Ran (Department of Chemistry, Hannam University)
Kwen, Hai-Doo (Department of Chemistry, Hannam University)
Choi, Seong-Ho (Department of Chemistry, Hannam University)
Publication Information
Polymer(Korea) / v.35, no.3, 2011 , pp. 216-222 More about this Journal
Abstract
A multi-walled carbon nanotube (MWNT) support with dual properties, an ionic property via tetra-amine and unpaired electrons via tri-amine, was prepared by radiation-induced graft polymerization of glycidyl methacrylate (GMA) and the subsequent amination of its epoxy group. The electrochemical microbial biosensor (EMB) was then fabricated by immobilization of a microbe (Alkaligenes spp.) onto the dual property-modified electrode, which was prepared with the mixture of the MWNT support and a $Nafion^{(R)}$ solution on a glass carbon (GC) electrode surface by a hand-casting method. The sensing range of the prepared EMB for phenol in a phosphate buffer solution was 0.005~7.0 mM. The total concentration of phenolic compounds in a commercial red wine was also determined using the EMB.
Keywords
radiation-induced graft polymerization; electrochemical microbial biosensor; MWNT supports; amination;
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