Journal
IEEE SENSORS JOURNAL
Volume 14, Issue 5, Pages 1573-1576Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2014.2298359
Keywords
Hydrothermally grown ZnO nanostructures; glucose biosensor; hydrogel composite
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Glucose oxidase was immobilized using a poly (hydroxyethylmethacrylate)-based hydrogel composite material containing polyethylene glycol and cross-linked with tetraethyleneglycol diacrylate onto a ZnO-modified microdiamond biosensor. The ZnO-modified biosensor was grown by hydrothermal decomposition on array of gold patterned microdiamonds with an electroactive area of 18.8 mm(2). The morphology of the ZnO-modified electrode was characterized by scanning electron microscope. A potential of +0.7 V versus Ag/AgCl reference electrode was applied to the biosensor. The hydrogel composite ZnO-modified microdiamond biosensor exhibited a linear dynamic range from 0.01 to 15 mM and a reproducible sensitivity of 31.4 mu A/mM cm(2). The experimental detection limit was 0.01 mM with a rapid response time of <2 s.
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