Effect of Immobilization Supports on the Amperometric Response of Silver Nanoparticles Enhanced Glucose Oxidase Electrodes

Silver nanoparticles enhanced glucose oxidase electrodes, which are based on polyvinyl butyral and chitosan, were fabricated and investigated. The sensitivity and maximum current i _max of the chitosan‐based electrode are 1.06 mA · M⁻¹ and 25.64 µA, respectively. However, the sensitivity and i _max of the polyvinyl butyral‐based electrode are 0.34 mA · M⁻¹ and 7.22 µA. The chitosan‐based electrode has a sensitivity 3.1 times higher and a maximum current 3.6 times larger than those of the polyvinyl butyral‐based electrode. Therefore, it is more sensitive and stable than the polyvinyl butyral‐based electrode.

Keywords:

• Chitosan
• polyvinyl butyral
• glucose oxidase
• silver nanoparticle
• amperometric response

We are grateful to Professor Banglin Chen for his comments on the manuscript. This work is supported by the National Natural Science Foundation of China (Grant Nos. 90607024, 90406024).