Development of Amplified Redox Sensor Suitable for Onsite Measurement

カテゴリ: 論文誌(論文単位)

グループ名: 【E】センサ・マイクロマシン部門

発行日: 2018/04/01

タイトル(英語): Development of Amplified Redox Sensor Suitable for Onsite Measurement

著者名: Sou Takahashi (National institute of Technology, Tsuruoka Colege), Ippei Akita (Toyohashi University of Technology), Kazuhiro Takahashi (Toyohashi University of Technology), Tatsuya Iwata (Toyohashi University of Technology), Kazuaki Sawada (Toyohashi Uni

著者名(英語): Sou Takahashi (National institute of Technology, Tsuruoka Colege), Ippei Akita (Toyohashi University of Technology), Kazuhiro Takahashi (Toyohashi University of Technology), Tatsuya Iwata (Toyohashi University of Technology), Kazuaki Sawada (Toyohashi Uni

キーワード: Redox sensor，Bipolar transistor，Amperometric sensors

要約(英語): The redox sensor is a type of electrochemical sensors that can detect chemical substances from redox response derived from the characteristics of the substance. Redox sensor is attractive due to their fast response, sensitivity, simplicity and miniaturization. Therefore, redox sensor is expected to be applied to onsite monitoring. However, the redox output current is reduced if the sensing area is small and/or the concentration of the sample is low. We proposed an amplified redox sensor (ARS), which combines the sensing area that serves as a working electrode with a bipolar transistor. For onsite detection, portable small size device that can measure even small concentrations is required. In this paper, we report the performance limit of our proposed ARS from input referred current noise that we calculated from measurement conditions of cyclic voltammetry and square wave voltammetry using potassium ferricyanide. In addition, we compared to MOSFET based transimpedance amplifier of a single element. As a result, bipolar transistor based the ARS can expect low detection limit about 2 orders of magnitude lower. Hence, we believe that the proposed amplified redox sensor devices can be used in high sensitivity on-site monitoring in electrochemical measurements.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.138 No.4 （2018）

本誌掲載ページ: 159-163 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/138/4/138_159/_article/-char/ja/