[13p-PB5-1~9] 12.7 Biomedical Engineering and Biochips

[13p-PB5-6] Development of Label-free IgG Impedance Biosensor Using Interdigitated Array Electrodes

〇(M1)Kaiki Tsugimura¹, Hitoshi Ohnuki¹, Daijyu Tsuya², Hideaki Endo¹, Mitsuru iziumi¹ (1.Tokyo Univ. of Marine Sci. & Tech., 2.NIMS)

Keywords:Electrochemical impedance,Protein G,Immunosensor

Electrochemical impedance biosensor detects the change of surface impedance and evaluates the absorbing molecules by the antigen-antibody interaction. In general, a homogenous layer of molecular recognition proteins immobilized on pinhole-free SAM can provide a highly sensitive biosensor. However, we greatly improved the sensing performance with employing inhomogeneous mixed SAM.