Spinel type MCo2O4 (M = Mn, Mg, Ni, Cu, Fe and Zn) for chemoresistance gas sensors

Zheng, Zichen; Liu, Kewei; Zhou, Yiwen; Zhang, Zicong; Su, Hongyuan; Nie, Xudong; Debliquy, Marc; Yu, Zexin; Zhang, Chao

doi:10.1016/j.mtchem.2024.101928

Cited by 2 publications

(2 citation statements)

References 193 publications

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“…When the sensor is exposed to air, oxygen molecules with high electron affinity are adsorbed on the sensor surface, and electrons are extracted. The relevant reactions are as follows [ 47 ].

…”

Section: Resultsmentioning

confidence: 99%

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CoFe2O4 on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

Kim,

Choi,

Jung

et al. 2024

Sensors

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In this study, a novel flexible ethanol gas sensor was created by the deposition of a CoFe2O4 (CFO) thin film on a thin mica substrate using the pulsed laser deposition technique. Transition electron microscopy (TEM) investigations clearly demonstrated the successful growth of CFO on the mica, where a well-defined interface was observed. Ethanol gas-sensing studies showed optimal performance at 200 °C, with the highest response of 19.2 to 100 ppm ethanol. Operating the sensor in self-heating mode under 7 V applied voltage, which corresponds to a temperature of approximately 200 °C, produced a maximal response of 19.2 to 100 ppm ethanol. This aligned with the highest responses observed during testing at 200 °C, confirming the sensor’s accuracy and sensitivity to ethanol under self-heating conditions. In addition, the sensor exhibited good selectivity to ethanol and excellent flexibility, maintaining its high performance after bending and tilting up to 5000 times. As this is the first report on flexible self-heated CFO gas sensors, we believe that this research holds great promise for the future development of high-quality sensors based on this approach.

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“…When the sensor is exposed to air, oxygen molecules with high electron affinity are adsorbed on the sensor surface, and electrons are extracted. The relevant reactions are as follows [ 47 ].

…”

Section: Resultsmentioning

confidence: 99%

“…When the sensor is exposed to air, oxygen molecules with high electron affinity are adsorbed on the sensor surface, and electrons are extracted. The relevant reactions are as follows [47]. Thus, an EDL was formed on the surface of the sensor, and the concentration of electrons in this layer was lower than that in the core.…”

Section: Gas-sensing Mechanismmentioning

confidence: 99%

CoFe2O4 on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

Kim,

Choi,

Jung

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

CoFe<sub>2</sub>O<sub>4</sub> on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

Kim,

Choi,

Jung

et al. 2024

Preprint

View full text Add to dashboard Cite

In this study, a novel flexible ethanol gas sensor was created by the deposition of CoFe2O4 (CFO) thin film was on a thin mica substrate using pulsed laser deposition. Transition electron microscopy (TEM) investigations clearly demonstrated the successful growth of CFO on the mica, where a well-defined interface was observed. Ethanol gas-sensing studies showed optimal performance at 200 °C, with the highest response, 19.2, to 100 ppm ethanol. Operating the sensor in self-heating mode under 7 V applied voltage, which was corresponds to a temperature of approximately 200 °C, produced a maximal response to ethanol of 19.2. This aligned with the highest responses observed during testing at 200 °C, confirming the sensor’s accuracy and sensitivity to ethanol under self-heating conditions. In addition, the sensor exhibited good selectivity to ethanol and excellent flexibility; maintaining its high performance after bending and tilting up to 5000 times. As this is the first report on flexible self-heated CFO gas sensors, we believe that this research holds great promise for the future development of high-quality sensors based on this approach.

show abstract

Spinel type MCo2O4 (M = Mn, Mg, Ni, Cu, Fe and Zn) for chemoresistance gas sensors

Cited by 2 publications

References 193 publications

CoFe2O4 on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

CoFe2O4 on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

CoFe<sub>2</sub>O<sub>4</sub> on Mica Substrate as Flexible Ethanol Gas Sensor in Self-Heating Mode

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