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http://dx.doi.org/10.7317/pk.2012.36.4.470

Introduction of Various Amine Groups onto Poly(glycidyl methacrylate)-g-MWNTs and their Application as Biosensor Supports  

Chung, Da-Jung (Department of Chemistry, Hannam University)
Kim, Ki-Chul (Department of Material Design Engineering, Mokwon University)
Choi, Seong-Ho (Department of Chemistry, Hannam University)
Publication Information
Polymer(Korea) / v.36, no.4, 2012 , pp. 470-477 More about this Journal
Abstract
A tyrosinase-immobilized biosensor was developed based on various amine-modified multi-walled carbon nanotube (MWNT) supports for the detection of phenolic compounds. MWNTs with various amine groups were prepared by radiation-induced graft polymerization of glycidyl methacrylate (GMA) onto MWNT supports and the subsequent amination of poly(GMA) graft chains. The physical and chemical properties of the poly(GMA)-grafted MWNT supports and the aminated MWNT supports were investigated by SEM, XPS, and TGA. Furthermore, the electrochemical properties of the prepared tyrosinase-modified biosensor based on MWNT supports with amine groups were also investigated. The response of the enzymatic biosensor was in the range of 0.1-0.9 mM for the concentration of phenol in a phosphate buffer solution. Various parameters influencing biosensor performance have been optimized: binder effects, pH, temperature, and the response to various phenolic compounds. The biosensor was tested on phenolic compounds contained in two different commercial red wines.
Keywords
tyrosinase-immobilized biosensor; MWNT supports with various amine groups; radiation-induced graft polymerization; detection of phenolic compounds;
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