Amplified Redox Sensor for Highly Sensitive Chemical Analysis

Sou TAKAHASHI; Masato FUTAGAWA; Makoto ISHIDA; Kazuaki SAWADA

doi:10.1587/transele.E99.C.95

Amplified Redox Sensor for Highly Sensitive Chemical Analysis

Sou TAKAHASHI, Masato FUTAGAWA, Makoto ISHIDA, Kazuaki SAWADA

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Because redox sensors can detect multi-ions and the concentration within a single sensing area using current and potential signals, they have been studied for chemical analysis applications. A small sensing area and a low concentration measurement typically reduce the output current of a redox sensor. Therefore, we previously fabricated the Amplified Redox Sensor, which has a working electrode combined with a bipolar transistor to amplify a small current signal. However, the current gain of the bipolar transistor had been changed by the redox current because the redox current flows in the base terminal of the bipolar transistor. In this study, we propose a new measurement method in which an offset current is inserted along with the redox current in the base terminal. The proposed measurement method can detect potassium ferricyanide (K₃[Fe (CN)₆]) concentrations as low as 1μM using the Square Wave Voltammetry method.

Publication: IEICE TRANSACTIONS on Electronics Vol.E99-C No.1 pp.95-99

Publication Date: 2016/01/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E99.C.95

Type of Manuscript: PAPER

Category: Electronic Circuits

Authors

Sou TAKAHASHI
  Toyohashi University of Technology
Masato FUTAGAWA
  Shizuoka University
Makoto ISHIDA
  Toyohashi University of Technology,Electronics Inspired-Interdisciplinary Research Institute
Kazuaki SAWADA
  Toyohashi University of Technology,Electronics Inspired-Interdisciplinary Research Institute

Keyword

redox sensor, bipolar transistor, amperometric sensors, chemical analysis

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Sou TAKAHASHI, Masato FUTAGAWA, Makoto ISHIDA, Kazuaki SAWADA, "Amplified Redox Sensor for Highly Sensitive Chemical Analysis" in IEICE TRANSACTIONS on Electronics, vol. E99-C, no. 1, pp. 95-99, January 2016, doi: 10.1587/transele.E99.C.95.
Abstract: Because redox sensors can detect multi-ions and the concentration within a single sensing area using current and potential signals, they have been studied for chemical analysis applications. A small sensing area and a low concentration measurement typically reduce the output current of a redox sensor. Therefore, we previously fabricated the Amplified Redox Sensor, which has a working electrode combined with a bipolar transistor to amplify a small current signal. However, the current gain of the bipolar transistor had been changed by the redox current because the redox current flows in the base terminal of the bipolar transistor. In this study, we propose a new measurement method in which an offset current is inserted along with the redox current in the base terminal. The proposed measurement method can detect potassium ferricyanide (K₃[Fe (CN)₆]) concentrations as low as 1μM using the Square Wave Voltammetry method.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E99.C.95/_p

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@ARTICLE{e99-c_1_95,
author={Sou TAKAHASHI, Masato FUTAGAWA, Makoto ISHIDA, Kazuaki SAWADA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Amplified Redox Sensor for Highly Sensitive Chemical Analysis},
year={2016},
volume={E99-C},
number={1},
pages={95-99},
abstract={Because redox sensors can detect multi-ions and the concentration within a single sensing area using current and potential signals, they have been studied for chemical analysis applications. A small sensing area and a low concentration measurement typically reduce the output current of a redox sensor. Therefore, we previously fabricated the Amplified Redox Sensor, which has a working electrode combined with a bipolar transistor to amplify a small current signal. However, the current gain of the bipolar transistor had been changed by the redox current because the redox current flows in the base terminal of the bipolar transistor. In this study, we propose a new measurement method in which an offset current is inserted along with the redox current in the base terminal. The proposed measurement method can detect potassium ferricyanide (K₃[Fe (CN)₆]) concentrations as low as 1μM using the Square Wave Voltammetry method.},
keywords={},
doi={10.1587/transele.E99.C.95},
ISSN={1745-1353},
month={January},}

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TY - JOUR
TI - Amplified Redox Sensor for Highly Sensitive Chemical Analysis
T2 - IEICE TRANSACTIONS on Electronics
SP - 95
EP - 99
AU - Sou TAKAHASHI
AU - Masato FUTAGAWA
AU - Makoto ISHIDA
AU - Kazuaki SAWADA
PY - 2016
DO - 10.1587/transele.E99.C.95
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E99-C
IS - 1
JA - IEICE TRANSACTIONS on Electronics
Y1 - January 2016
AB - Because redox sensors can detect multi-ions and the concentration within a single sensing area using current and potential signals, they have been studied for chemical analysis applications. A small sensing area and a low concentration measurement typically reduce the output current of a redox sensor. Therefore, we previously fabricated the Amplified Redox Sensor, which has a working electrode combined with a bipolar transistor to amplify a small current signal. However, the current gain of the bipolar transistor had been changed by the redox current because the redox current flows in the base terminal of the bipolar transistor. In this study, we propose a new measurement method in which an offset current is inserted along with the redox current in the base terminal. The proposed measurement method can detect potassium ferricyanide (K₃[Fe (CN)₆]) concentrations as low as 1μM using the Square Wave Voltammetry method.
ER -