The effect of sensor temperature and MOx layer thickness on the sensitivity of SnO<sub>2</sub>- and WO<sub>3</sub>-based chemiresistive sensors to ethylene gas

Krivec, Matic; Leitner, Raimund; Waldner, R.; Gostner, Johanna M.; Überall, Florian

doi:10.1117/12.2179235

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The MiCS-5914 sensor is far more sensitive to ethylene gas than the MQ-3 sensor at low RH (0% and 33%), though both sensors have similar sensitivities at 64% RH. The lower sensitivity of the MQ-3 sensor is rather surprising because our previous work found that SnO 2 is more sensitive than WO 3 to ethylene gas [ 13 ].…”

Section: Resultsmentioning

confidence: 99%

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

Krivec

Gunnigle

Abram

et al. 2015

Sensors

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The sensitivity of two commercial metal oxide (MOx) sensors to ethylene is tested at different relative humidities. One sensor (MiCS-5914) is based on tungsten oxide, the other (MQ-3) on tin oxide. Both sensors were found to be sensitive to ethylene concentrations down to 10 ppm. Both sensors have significant response times; however, the tungsten sensor is the faster one. Sensor models are developed that predict the concentration of ethylene given the sensor output and the relative humidity. The MQ-3 sensor model achieves an accuracy of ±9.2 ppm and the MiCS-5914 sensor model predicts concentration to ±7.0 ppm. Both sensors are more accurate for concentrations below 50 ppm, achieving ±6.7 ppm (MQ-3) and 5.7 ppm (MiCS-5914).

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Section: Resultsmentioning

confidence: 99%

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

Krivec

Gunnigle

Abram

et al. 2015

Sensors

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“…SnO 2 is the most prevalent sensing material used for ethylene sensors due to its high sensitivity [40], reliability, and electrical conductivity [41]. The common SnO 2 fabrication methods include CVD, USP, and sputtering methods.…”

Section: Snomentioning

confidence: 99%

A Review on Metal Oxide Semiconductor-Based Chemo-Resistive Ethylene Sensors for Agricultural Applications

Hu,

Cai,

Wang

et al. 2024

Chemosensors

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Ethylene, an important phytohormone, significantly influences plant growth and the ripeness of fruits and vegetables. During the transportation and storage of agricultural products, excessive ethylene can lead to economic losses due to rapid deterioration. Metal oxide semiconductor (MOS)-based chemo-resistive sensors are a promising technology for the detection of ethylene due to their low cost, high sensitivity, portability, etc. This review comprehensively summarizes the materials, fabrications, agricultural applications, and sensing mechanisms of these sensors. Moreover, the current challenges are highlighted and the potential solutions are proposed.

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SnO₂ Quantum Dots-Functionalized MoO₃ Nanobelts for High-Selectivity Ethylene Sensing

Jin

Wang

Liu

et al. 2022

ACS Appl. Nano Mater.

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Highly selective and sensitive detection of the phytohormone ethylene, especially at low concentrations, is essential for control of plant growth, development, senescence, and fruit ripening. Metal oxide semiconductors exhibit excellent sensing properties due to their excellent physicochemical properties and unique structures. This study developed SnO2 quantum dots (QDs)-functionalized MoO3 nanobelts (NBs) for highly selective and sensitive ethylene detection. The prepared nanocomposite is composed of MoO3 NBs surface loaded with fine SnO2 QDs, and the n-n heterojunction is formed at the interface. Sensing properties of the SnO2 QDs/MoO3 NBs to ethylene are measured, and results reveal that 2.5%-SnO2 QDs/MoO3 NBs exhibited excellent response (100 ppm 40%), low detection limit (500 ppb), and selectivity to ethylene at a low operating temperature (150 °C) compared with pure MoO3 NBs and SnO2 QDs. The enhanced gas-sensing performance is explained based on the modulation of the interface barrier caused by the formation of n-n heterojunctions at the SnO2/MoO3 interface and the synergetic effect of these two materials. This heterojunction indicates that SnO2 QDs/MoO3 NBs are promising sensing materials for the ethylene gas sensor.

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The effect of sensor temperature and MOx layer thickness on the sensitivity of SnO₂- and WO₃-based chemiresistive sensors to ethylene gas

Cited by 4 publications

References 6 publications

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

A Review on Metal Oxide Semiconductor-Based Chemo-Resistive Ethylene Sensors for Agricultural Applications

SnO₂ Quantum Dots-Functionalized MoO₃ Nanobelts for High-Selectivity Ethylene Sensing

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The effect of sensor temperature and MOx layer thickness on the sensitivity of SnO2- and WO3-based chemiresistive sensors to ethylene gas

Cited by 4 publications

References 6 publications

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

A Review on Metal Oxide Semiconductor-Based Chemo-Resistive Ethylene Sensors for Agricultural Applications

SnO2 Quantum Dots-Functionalized MoO3 Nanobelts for High-Selectivity Ethylene Sensing

Contact Info

Product

Resources

About

The effect of sensor temperature and MOx layer thickness on the sensitivity of SnO₂- and WO₃-based chemiresistive sensors to ethylene gas

SnO₂ Quantum Dots-Functionalized MoO₃ Nanobelts for High-Selectivity Ethylene Sensing