[14p-P19-1~20] 12.7 Biomedical Engineering and Biochips

[14p-P19-17] Development of Label-free IgG Impedance Biosensor Using Parallel Plate Electrodes

〇Yusuke Kusaka¹, Hitoshi Ohnuki¹, Kaiki Tsugimura¹, Daiju Tsuya², Haiyun Wu¹, Hideaki Endo¹, Mitsuru Izumi¹ (1.Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 2.National Institute for Materials Science)

Keywords:Immunosensor, Electrochemical Impedance Spectroscopy, Biosensor

It has been commonly used the interdigitated array electrodes for improving sensing performance of the electrochemical impedance biosensors. However, according to current density analysis, a strong current flows through the edge portion but no current exists on the flat upper surface of the electrodes, even though the upper portion has a very well-defined surface state. In this study, we fabricated the parallel-plate type electrodes with a narrow gap, intending high sensitivity and stability measurement with the well-defined surface electrode.