An Amperometric Sensor for Chemical Imaging Using Photoconductive Organic Film

Takuya HAGIWARA; Masataka TAKAZAWA; Hidekazu UCHIDA; Yuki HASEGAWA; Tamaki YAJI

doi:10.1093/ietele/e91-c.12.1863

An Amperometric Sensor for Chemical Imaging Using Photoconductive Organic Film

Takuya HAGIWARA, Masataka TAKAZAWA, Hidekazu UCHIDA, Yuki HASEGAWA, Tamaki YAJI

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We have developed an amperometric sensor employing a photoconductive organic thin film that enables the measurement of the two-dimensional distribution of redox current on a sensor surface. The sensor simply consists of photoconductive film and transparent electrode. A focused light beam through the transparent electrode excites the photoconductive film that leads to detect local redox current at the beam position. Intensity of the redox current depends on local concentration of redox species of solution on the sensor. We investigated several materials for the photoconductive film and found a suitable structure is Cu-phthalocyanine doped polyvinylcarbazole film/indium tin oxide/glass substrate. Compared with a conventional two-dimensional chemical sensor, our newly developed sensor can be prepared by lower cost fabrication methods without complex semiconductor processes. The sensor showed a good signal dependence on the concentration of K₃Fe(CN)₆/K₄Fe(CN)₆ in an aqueous solution at 15.4 nA/dec at a constant bias voltage of 0.8 V. We measured the two-dimensional distribution of ions in an agarose gel of 2 mm thickness. The result showed a photograph of the diffusion process of redox species. We also discuss the discrimination of redox species like voltammetry.

Publication: IEICE TRANSACTIONS on Electronics Vol.E91-C No.12 pp.1863-1868

Publication Date: 2008/12/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e91-c.12.1863

Type of Manuscript: Special Section PAPER (Special Section on The Forefront of 21st Century Organic Molecular Electronics)

Category: Materials & Devices

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Takuya HAGIWARA, Masataka TAKAZAWA, Hidekazu UCHIDA, Yuki HASEGAWA, Tamaki YAJI, "An Amperometric Sensor for Chemical Imaging Using Photoconductive Organic Film" in IEICE TRANSACTIONS on Electronics, vol. E91-C, no. 12, pp. 1863-1868, December 2008, doi: 10.1093/ietele/e91-c.12.1863.
Abstract: We have developed an amperometric sensor employing a photoconductive organic thin film that enables the measurement of the two-dimensional distribution of redox current on a sensor surface. The sensor simply consists of photoconductive film and transparent electrode. A focused light beam through the transparent electrode excites the photoconductive film that leads to detect local redox current at the beam position. Intensity of the redox current depends on local concentration of redox species of solution on the sensor. We investigated several materials for the photoconductive film and found a suitable structure is Cu-phthalocyanine doped polyvinylcarbazole film/indium tin oxide/glass substrate. Compared with a conventional two-dimensional chemical sensor, our newly developed sensor can be prepared by lower cost fabrication methods without complex semiconductor processes. The sensor showed a good signal dependence on the concentration of K₃Fe(CN)₆/K₄Fe(CN)₆ in an aqueous solution at 15.4 nA/dec at a constant bias voltage of 0.8 V. We measured the two-dimensional distribution of ions in an agarose gel of 2 mm thickness. The result showed a photograph of the diffusion process of redox species. We also discuss the discrimination of redox species like voltammetry.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e91-c.12.1863/_p

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@ARTICLE{e91-c_12_1863,
author={Takuya HAGIWARA, Masataka TAKAZAWA, Hidekazu UCHIDA, Yuki HASEGAWA, Tamaki YAJI, },
journal={IEICE TRANSACTIONS on Electronics},
title={An Amperometric Sensor for Chemical Imaging Using Photoconductive Organic Film},
year={2008},
volume={E91-C},
number={12},
pages={1863-1868},
abstract={We have developed an amperometric sensor employing a photoconductive organic thin film that enables the measurement of the two-dimensional distribution of redox current on a sensor surface. The sensor simply consists of photoconductive film and transparent electrode. A focused light beam through the transparent electrode excites the photoconductive film that leads to detect local redox current at the beam position. Intensity of the redox current depends on local concentration of redox species of solution on the sensor. We investigated several materials for the photoconductive film and found a suitable structure is Cu-phthalocyanine doped polyvinylcarbazole film/indium tin oxide/glass substrate. Compared with a conventional two-dimensional chemical sensor, our newly developed sensor can be prepared by lower cost fabrication methods without complex semiconductor processes. The sensor showed a good signal dependence on the concentration of K₃Fe(CN)₆/K₄Fe(CN)₆ in an aqueous solution at 15.4 nA/dec at a constant bias voltage of 0.8 V. We measured the two-dimensional distribution of ions in an agarose gel of 2 mm thickness. The result showed a photograph of the diffusion process of redox species. We also discuss the discrimination of redox species like voltammetry.},
keywords={},
doi={10.1093/ietele/e91-c.12.1863},
ISSN={1745-1353},
month={December},}

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TY - JOUR
TI - An Amperometric Sensor for Chemical Imaging Using Photoconductive Organic Film
T2 - IEICE TRANSACTIONS on Electronics
SP - 1863
EP - 1868
AU - Takuya HAGIWARA
AU - Masataka TAKAZAWA
AU - Hidekazu UCHIDA
AU - Yuki HASEGAWA
AU - Tamaki YAJI
PY - 2008
DO - 10.1093/ietele/e91-c.12.1863
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E91-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2008
AB - We have developed an amperometric sensor employing a photoconductive organic thin film that enables the measurement of the two-dimensional distribution of redox current on a sensor surface. The sensor simply consists of photoconductive film and transparent electrode. A focused light beam through the transparent electrode excites the photoconductive film that leads to detect local redox current at the beam position. Intensity of the redox current depends on local concentration of redox species of solution on the sensor. We investigated several materials for the photoconductive film and found a suitable structure is Cu-phthalocyanine doped polyvinylcarbazole film/indium tin oxide/glass substrate. Compared with a conventional two-dimensional chemical sensor, our newly developed sensor can be prepared by lower cost fabrication methods without complex semiconductor processes. The sensor showed a good signal dependence on the concentration of K₃Fe(CN)₆/K₄Fe(CN)₆ in an aqueous solution at 15.4 nA/dec at a constant bias voltage of 0.8 V. We measured the two-dimensional distribution of ions in an agarose gel of 2 mm thickness. The result showed a photograph of the diffusion process of redox species. We also discuss the discrimination of redox species like voltammetry.
ER -