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http://dx.doi.org/10.5714/CL.2010.11.3.216

Tyrosinase-Immobilized Biosensor Based on Ionic Property-Modified MWNTs Prepared by Radiation-Induced Graft Polymerization  

Ryu, Ha-Na (Department of Chemistry, Hannam University)
Choi, Seong-Ho (Department of Chemistry, Hannam University)
Publication Information
Carbon letters / v.11, no.3, 2010 , pp. 216-223 More about this Journal
Abstract
Two-types of ionically modified multi-walled carbon nanotube (MWNTs) based sensors were developed by radiationinduced graft polymerization using vinyl monomers such as 3-(butyl imidazol)-2-(hydroxyl)propyl methyl methacrylate and 1-[(4-ethenylphenyl)methyl]-3-buthyl-imidazolium chloride with ionic properties, in aqueous solution at room temperature. Subsequently, the tyrosinase-immobilized biosensor was fabricated by a hand-casting of the ionic property-modified MWNTs, tyrosinase, and chitosan solution as a binder onto ITO glass surface. The sensing ranges of the tyrosinase-biosensor for phenol in phosphate buffer solution was in the range of 0.005~0.2 mM. The total phenolic compounds mainly such as caffeine of the tyrosinase-immobilized biosensor for commercial coffee were also determined.
Keywords
Radiation-induced graft polymerization; Tyrosinase-immobilized biosensor; MWNTs; Ionic property-modified MWNTs;
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