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2023 Fiscal Year Final Research Report

Creation of integrated sensing system based on bipolar electrochemistry

Research Project

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Project/Area Number 21H01958
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Suzuki Hiroaki  筑波大学, 数理物質系, 教授 (20282337)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsバイポーラ電気化学 / バイポーラ電極 / 3電極系 / 電気化学発光 / 電位制御 / クーロメトリー / 金属置換 / センサアレイ
Outline of Final Research Achievements

To control the potential of bipolar electrodes (BPEs), an ion-selective electrode was formed in a separate chamber and a closed circuit was formed. The effect of fixing the potential was clearly observed as changes in the intensity of electrochemiluminescence. In conducting coulometry coupled with silver metallization, a device was fabricated to conduct metallization by bipolar electrochemistry and measure the amount of deposited silver using a three-electrode system on the same chip. Enhancement of sensitivity was confirmed. To promote integration of BPEs in a closed bipolar system, a BPE structure with cathodic and anodic poles connected with thin leads was used, which was applied to fabricate arrays of DNA sensors and Clark-type oxygen electrodes.

Free Research Field

化学センサ

Academic Significance and Societal Importance of the Research Achievements

電気化学分析では3電極系が広く用いられているが、多数の3電極系を微小なチップ上に集積化する場合、配線数の増加、デバイスの動作、信号検出が非常に複雑になるという課題があった。バイポーラ電気化学系は装置構成がシンプルで、外部装置に接続されない電極 (BPE) でセンシングが可能であるため、多数のセンサのアレイ化が容易に実現できるという特長がある。また、高度な電気化学デバイスを実現するための新技術の可能性を多く含んでいる。今回の研究の成果は、今後の電気化学デバイス、特に微細加工で作製されるデバイスの研究開発に有用な知見を与えるものと考えている。

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Published: 2025-01-30  

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