Abstract
Glucose biosensors have been formed with glucose oxidase (GOD) immobilized in composite immobilization membrane matrix, which is composed of hydrophobic gold, or hydrophilic gold, or hydrophobic silica nanoparticles, or the combination of gold and silica nanoparticles, and polyvinyl butyral (PVB) by a sol-gel method. The experiments show that nanoparticles can significantly enhance the catalytic activity of the immobilization enzyme. The current response can be increased from tens of nanoamperometer (nA) to thousands of nanoamperometer to the same glucose concentration, and the electrodes respond very quickly, to about 1 min. The function of nanoparticles effect on immobilization enzyme has been discussed.
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