Investigation of graphene-nanoparticle nanocomposite electrode for glucose sensor applications

• Main Authors: Yu Wei Hsu, 徐鈺崴
• Other Authors: C. L. Sun
• Format: Others
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/62375255382051841353

碩士 === 長庚大學 === 化工與材料工程學系 === 99 === In the first part of this study, graphene/Pt nanocomposites have been synthesized for nonenzymatic electrochemical glucose biosensor applications. Transmission electron microscopy (TEM) images show that the spherical and size-selected Pt nanoparticles were well dispersed on the surface of graphene. For the aperometric glucose detection, the low detection limit of 2.67 μM with wide linear range from 3 μM to 3.75 mM can be obtained using the graphene/Pt-modified glassy carbon (GC) electrode with a low loading. Under the applied potential of +0.10 V vs. Ag/AgCl, the graphene/Pt electrode exhibited a sensitivity of 3.71 μA mM-1 cm-2. In the second part of this study, graphene/CuO nanocomposites have been synthesized for nonenzymatic electrochemical glucose biosensor applications. Transmission electron microscopy (TEM) images show that the spherical and size-selected CuO nanoparticles were well dispersed on the surface of graphene. For the aperometric glucose detection, the low detection limit of 1 μM with wide linear range from 1 μM to 8 mM can be obtained using the graphene/CuO-modified glassy carbon (GC) electrode with a low loading. Under the applied potential of +0.6 V vs. Ag/AgCl, the graphene/CuO electrode exhibited a sensitivity of 1065.21 μA mM-1 cm-2. With such a good analytical performance from simple process, it is believed that graphene / CuO nanocomposites are promising for the development of cost-effective nonenzymatic electrochemical glucose biosensors.