Gas dependent response in temperature transient of SnO/sub 2/ gas sensor

Hiranaka, Yukio; Abe, T.

doi:10.1109/sensor.1991.148827

Cited by 9 publications

(6 citation statements)

References 1 publication

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“…In the realm of temperature modulation with transients, Hiranaka et al [16] have analyzed the cooling temperature transients when the heater supply is switched from a high voltage to a low voltage. The response of the sensor for different odors presents peaks at different positions in the transient.…”

Section: Introductionmentioning

confidence: 99%

Transient response analysis for temperature-modulated chemoresistors

Gutierrez‐Osuna

Gutiérrez-Gálvez

Powar

2003

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Transient response analysis for temperature-modulated chemoresistors

Gutierrez‐Osuna

Gutiérrez-Gálvez

Powar

2003

Sensors and Actuators B: Chemical

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“…Blood ethanol concentration can be determined from its concentration in breath, a blood-breath alcohol partition ratio of 2000 having been widely adopted. 5,11,28 It has also been reported that breath acetaldehyde is related to its blood concentration as an intoxicant substance, especially for aldehyde dehydrogenase type 2 (ALDH2) deficiency type. Nearly half of the Japanese people are negative for ALDH2.…”

Section: Stick-type Biosniffers For Ethanol and Acetaldehyde In Breatmentioning

confidence: 99%

“…Considerable effort has gone into improving the ethanol selectivity and sensitivity of semiconductor-type gas sensors. [5][6][7] Semiconductor sensors are still inadequate for sensing multianalyte samples such as expiratory gas, because the sensor response is based only on changes in the electrical conductivity of the device, following adsorption of gaseous substances. 1,[5][6][7][8] Although an improvement in semiconductor sensors and quartz crystal microbalance (QCM) devices (including electronic nose) has been reported, it is still far from the selectivity achievable using biological recognition systems such as enzymes.…”

mentioning

confidence: 99%

Biosniffers (Gas‐Phase Biosensors) as Artificial Olfaction

Mitsubayashi

2007

Handbook of Biosensors and Biochips

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Biochemical gas sensors (called biosniffers have been developed as one of the gas‐phase bioassay approaches by using biological recognition systems such as drug metabolizing enzymes. Various kinds of volatile chemicals are analyzed by the biosniffers, with excellent gas selectivity being attributable to biological interactions such as enzyme specificity. The biochemical sniffers have been used for environmental assessment and human odor analysis as physiological and dental diagnoses. Potential application of the biosniffers includes not only its use, instead of sniffer dogs, in the detection of illegal drugs, nerve gases, and disaster victims but also artificial olfaction for smell informatics (smell communication, biometrics, etc.).

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“…Hiranaka et al [9] and Gutierrez-Osuna et al [10] conducted a study to examine the response of odorous substances while reducing the voltage of the sensor heater from high-temperature conditions to lowtemperature conditions to compare the response characteristics of odorous substances according to the sensor temperature.…”

Section: Introductionmentioning

confidence: 99%

A Study on Pattern Analysis of Odorous Substances with a Single Gas Sensor

Kim¹,

choi²,

Kim³

2016

Journal of Sensor Science and Technology

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This study used a single metal oxide semiconductor (MOS) sensor to classify the major odorous gases hydrogen sulfide (H 2 S), ammonia (NH 3 ) and toluene (C 6 H 5 CH 3 ). In order to classify these odorous substances, the voltage on the MOS sensor heater was gradually reduced in 0.5 V steps 5.0 V to examine the changes to the response by the cooling effect on the sensor as the voltage decreased. The hydrogen sulfide gas showed the highest sensitivity compared to odorless air under approximately 2.5 V and the ammonia and toluene gases showed the highest sensitivity under approximately 5.0 V. In other words, the hydrogen sulfide gas reacted better in the low temperature range of the MOS sensor, and the ammonia and toluene gases reacted better in the high-temperature range. In order to analyze the response characteristics of the MOS sensor by temperature in a pattern, a two-dimensional (2D) x-y pattern analysis was introduced to clearly classify the hydrogen sulfide, ammonia, and toluene gases. The hydrogen sulfide gas was identified by a straight line with a slope of 1.73, whereas the ammonia gas had a slope of 0.05 and the toluene gas had a slope of 0.52. Therefore, the 2D x-y pattern analysis is suggested as a new way to classify these odorous substances.

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Gas dependent response in temperature transient of SnO/sub 2/ gas sensor

Cited by 9 publications

References 1 publication

Transient response analysis for temperature-modulated chemoresistors

Transient response analysis for temperature-modulated chemoresistors

Biosniffers (Gas‐Phase Biosensors) as Artificial Olfaction

A Study on Pattern Analysis of Odorous Substances with a Single Gas Sensor

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