Capacitive-type sensors for the selective detection of nitrogen oxides

Tatsumi Ishihara; Shinobu Sato; Yusaku Takita

doi:10.1016/0925-4005(95)85088-0

Capacitive-type sensors for the selective detection of nitrogen oxides

Tatsumi Ishihara, Shinobu Sato, Yusaku Takita

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

20 Citations (Scopus)

Abstract

Since the capacitance of an oxide mixture consiting of two kinds of semiconducting oxides depends on the NO concentration, these mixed-oxide capacitors can be applied for a capacitive type of NO_x sensor. Among the examined oxides, NiO mixed with ZnO was the most promising in terms of the sensitivity and response characteristics. A temperature slightly higher than 300°C was desirable as the operating temperature of the NiO-ZnO element, and a linear relationship between capacitance and NO_x concentration exists below 30 ppm. Furthermore, the capacitance of NiO-ZnO is highly selective to NO_x. As a result, the binary oxide of NiO-ZnO has a great potential as a new type of NO_x sensor based on a capacitance change.

Original language	English
Pages (from-to)	392-395
Number of pages	4
Journal	Sensors and Actuators: B. Chemical
Volume	25
Issue number	1-3
DOIs	https://doi.org/10.1016/0925-4005(95)85088-0
Publication status	Published - Apr 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/0925-4005(95)85088-0

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title = "Capacitive-type sensors for the selective detection of nitrogen oxides",

abstract = "Since the capacitance of an oxide mixture consiting of two kinds of semiconducting oxides depends on the NO concentration, these mixed-oxide capacitors can be applied for a capacitive type of NOx sensor. Among the examined oxides, NiO mixed with ZnO was the most promising in terms of the sensitivity and response characteristics. A temperature slightly higher than 300°C was desirable as the operating temperature of the NiO-ZnO element, and a linear relationship between capacitance and NOx concentration exists below 30 ppm. Furthermore, the capacitance of NiO-ZnO is highly selective to NOx. As a result, the binary oxide of NiO-ZnO has a great potential as a new type of NOx sensor based on a capacitance change.",

author = "Tatsumi Ishihara and Shinobu Sato and Yusaku Takita",

year = "1995",

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T1 - Capacitive-type sensors for the selective detection of nitrogen oxides

AU - Ishihara, Tatsumi

AU - Sato, Shinobu

AU - Takita, Yusaku

PY - 1995/4

Y1 - 1995/4

N2 - Since the capacitance of an oxide mixture consiting of two kinds of semiconducting oxides depends on the NO concentration, these mixed-oxide capacitors can be applied for a capacitive type of NOx sensor. Among the examined oxides, NiO mixed with ZnO was the most promising in terms of the sensitivity and response characteristics. A temperature slightly higher than 300°C was desirable as the operating temperature of the NiO-ZnO element, and a linear relationship between capacitance and NOx concentration exists below 30 ppm. Furthermore, the capacitance of NiO-ZnO is highly selective to NOx. As a result, the binary oxide of NiO-ZnO has a great potential as a new type of NOx sensor based on a capacitance change.

AB - Since the capacitance of an oxide mixture consiting of two kinds of semiconducting oxides depends on the NO concentration, these mixed-oxide capacitors can be applied for a capacitive type of NOx sensor. Among the examined oxides, NiO mixed with ZnO was the most promising in terms of the sensitivity and response characteristics. A temperature slightly higher than 300°C was desirable as the operating temperature of the NiO-ZnO element, and a linear relationship between capacitance and NOx concentration exists below 30 ppm. Furthermore, the capacitance of NiO-ZnO is highly selective to NOx. As a result, the binary oxide of NiO-ZnO has a great potential as a new type of NOx sensor based on a capacitance change.

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Capacitive-type sensors for the selective detection of nitrogen oxides

Abstract

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