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Detection of Protein Molecules by Electrical Current Response Using Two-Electrode Method
류홍근 ( Hong Kun Lyu ),우성호 ( Sung Ho Woo ),한윤수 ( Yonn Soo Han ),이희호 ( Hee Ho Lee ),신장규 ( Jang Kyoo Shin ) 한국센서학회 2011 센서학회지 Vol.20 No.2
In order to protect human lives from disease, various biosensors having the potential to analyze a variety of biomolecules have been utilized. Biosensors constitute one of the most promising ways to monitor and detect various biomolecules corresponding to diseases. In this study, we demonstrate that the reaction of streptavidin molecules with biotin on a gold electrode can be detected using the twoelectrode method with a gold electrode and a platinum reference electrode. We also show the characteristics of the electrical current response. While detecting 2-μM streptavidin molecules dissolved in phosphate buffered saline(PBS) solution, we found that an analytical biosensor can operate on the principle of detecting an antigen-antibody reaction event of protein molecules using the two-electrode method. We think that the potential step method might be useful to detect the occurrence of any antigen-antibody reactions and can be combined with other devices or ICs such as BJTs, MOSFETs, and OP-amps for the detection of biomolecules of diseases.