Preparation of iridium oxide and its application in sensor-actuator systems

Wouter Olthuis; J.C. van Kerkhof; J.C. van Kerkhof; Piet Bergveld; M. Bos; W.E. van der Linden

doi:10.1016/0925-4005(91)80191-L

Preparation of iridium oxide and its application in sensor-actuator systems

Wouter Olthuis, J.C. van Kerkhof, J.C. van Kerkhof, Piet Bergveld, M. Bos, W.E. van der Linden

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Acid or base concentrations can be determined by coulometric titration. A new all-iridium oxide sensor-actuator device is presented, of which the titrant is generated by a reversible redox reaction occurring in the electroactive iridium oxide actuator electrode, and the equivalence point in the titration curve is detected by the pH-sensitive iridium oxide sensor. The advantage with respect to the formerly used noble metal actuator electrode/ISFET sensor device is twofold: on the one hand, interference of Cl− ions, which oxidize at the noble metal actuator electrode during titration, is avoided and on the other hand, the preparation of the all-iridium oxide device is easier than of the ISFET-based devices. In addition to the conventional potential sweep method of oxide growth, a new current-pulse method is proposed, of which the parameters for optimal growth depend less on the pH of the solution.

Original language	Undefined
Pages (from-to)	151-156
Number of pages	7
Journal	Sensors and actuators. B: Chemical
Volume	0
Issue number	4
DOIs	https://doi.org/10.1016/0925-4005(91)80191-L
Publication status	Published - 1991

Keywords

METIS-112170
IR-72985

Access to Document

10.1016/0925-4005(91)80191-L

Olthuis91preparation

Cite this

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title = "Preparation of iridium oxide and its application in sensor-actuator systems",

abstract = "Acid or base concentrations can be determined by coulometric titration. A new all-iridium oxide sensor-actuator device is presented, of which the titrant is generated by a reversible redox reaction occurring in the electroactive iridium oxide actuator electrode, and the equivalence point in the titration curve is detected by the pH-sensitive iridium oxide sensor. The advantage with respect to the formerly used noble metal actuator electrode/ISFET sensor device is twofold: on the one hand, interference of Cl− ions, which oxidize at the noble metal actuator electrode during titration, is avoided and on the other hand, the preparation of the all-iridium oxide device is easier than of the ISFET-based devices. In addition to the conventional potential sweep method of oxide growth, a new current-pulse method is proposed, of which the parameters for optimal growth depend less on the pH of the solution.",

keywords = "METIS-112170, IR-72985",

author = "Wouter Olthuis and {van Kerkhof}, J.C. and {van Kerkhof}, J.C. and Piet Bergveld and M. Bos and {van der Linden}, W.E.",

year = "1991",

doi = "10.1016/0925-4005(91)80191-L",

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TY - JOUR

T1 - Preparation of iridium oxide and its application in sensor-actuator systems

AU - Olthuis, Wouter

AU - van Kerkhof, J.C.

AU - Bergveld, Piet

AU - Bos, M.

AU - van der Linden, W.E.

PY - 1991

Y1 - 1991

N2 - Acid or base concentrations can be determined by coulometric titration. A new all-iridium oxide sensor-actuator device is presented, of which the titrant is generated by a reversible redox reaction occurring in the electroactive iridium oxide actuator electrode, and the equivalence point in the titration curve is detected by the pH-sensitive iridium oxide sensor. The advantage with respect to the formerly used noble metal actuator electrode/ISFET sensor device is twofold: on the one hand, interference of Cl− ions, which oxidize at the noble metal actuator electrode during titration, is avoided and on the other hand, the preparation of the all-iridium oxide device is easier than of the ISFET-based devices. In addition to the conventional potential sweep method of oxide growth, a new current-pulse method is proposed, of which the parameters for optimal growth depend less on the pH of the solution.

AB - Acid or base concentrations can be determined by coulometric titration. A new all-iridium oxide sensor-actuator device is presented, of which the titrant is generated by a reversible redox reaction occurring in the electroactive iridium oxide actuator electrode, and the equivalence point in the titration curve is detected by the pH-sensitive iridium oxide sensor. The advantage with respect to the formerly used noble metal actuator electrode/ISFET sensor device is twofold: on the one hand, interference of Cl− ions, which oxidize at the noble metal actuator electrode during titration, is avoided and on the other hand, the preparation of the all-iridium oxide device is easier than of the ISFET-based devices. In addition to the conventional potential sweep method of oxide growth, a new current-pulse method is proposed, of which the parameters for optimal growth depend less on the pH of the solution.

KW - METIS-112170

KW - IR-72985

U2 - 10.1016/0925-4005(91)80191-L

DO - 10.1016/0925-4005(91)80191-L

M3 - Article

VL - 0

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EP - 156

JO - Sensors and actuators. B: Chemical

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