Self-heated CO gas sensor based on Au-decorated Sb-implanted WS2 nanosheets

Kim, Jae‐Hun; Sakaguchi, Isao; Hishita, Syunichi; Ohsawa, Takeo; Suzuki, Taku; Saito, Noriko

doi:10.1016/j.snb.2023.133501

Cited by 23 publications

(13 citation statements)

References 43 publications

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“…Thus, a smaller amount of etha nol could be adsorbed onto the sensor, resulting in a lower response than under dry con ditions. In addition, the baseline resistance increases under humid conditions owing to the dissociation of H2O molecules from the sensor and the generation of electrons in th n-type sensing layer, thereby increasing the base resistance of the sensor [38][39][40]. To check the reproducibility of the sensor, we fabricated three gas sensors using the same procedure and the same materials.…”

Section: Gas-sensing Studiesmentioning

confidence: 99%

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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Section: Gas-sensing Studiesmentioning

confidence: 99%

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

Kim,

Choi,

Jung

et al. 2024

Sensors

Self Cite

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Section: Acs Sensors Pubsacsorg/acssensorsmentioning

confidence: 99%

Advances in 2D Materials Based Gas Sensors for Industrial Machine Olfactory Applications

Wu,

Li,

Yang

et al. 2024

ACS Sens.

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The escalating development and improvement of gas sensing ability in industrial equipment, or “machine olfactory”, propels the evolution of gas sensors toward enhanced sensitivity, selectivity, stability, power efficiency, cost-effectiveness, and longevity. Two-dimensional (2D) materials, distinguished by their atomic-thin profile, expansive specific surface area, remarkable mechanical strength, and surface tunability, hold significant potential for addressing the intricate challenges in gas sensing. However, a comprehensive review of 2D materials-based gas sensors for specific industrial applications is absent. This review delves into the recent advances in this field and highlights the potential applications in industrial machine olfaction. The main content encompasses industrial scenario characteristics, fundamental classification, enhancement methods, underlying mechanisms, and diverse gas sensing applications. Additionally, the challenges associated with transitioning 2D material gas sensors from laboratory development to industrialization and commercialization are addressed, and future-looking viewpoints on the evolution of next-generation intelligent gas sensory systems in the industrial sector are prospected.

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“…The repeatability of the device was good and the response level increased with increasing ambient humidity. Due to the adsorption of water molecules in the air, the WS 2 nanosheets became unstable and the sensitivity to NH 3 was too low for practical applications. − Therefore, there is an urgent need to improve the sensing performance of NH 3 at room temperature and the stability of WS 2 nanosheets in air.…”

Section: Introductionmentioning

confidence: 99%

Moisture-Resistant and Highly Selective NH₃ Sensor Based on CdS/WS₂ Composite Heterojunction

Zhang

Wang

et al. 2023

Langmuir

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This study reports the synthesis of CdS/WS2 composites via a green and ultra-low-cost hydrothermal method. By controlling the relative mass ratio between WS2 and CdS, an n–n type CdS/WS2 heterostructure, with excellent NH3 gas-sensitive properties, was developed and investigated at room temperature. Compared with pristine WS2 and CdS, the CdS/WS2-40%wt composite exhibited excellent selectivity of more than 4 orders of magnitude for sensing NH3, a very short recovery time of 3 s, and ultrahigh selectivity at room temperature. The large specific surface area of the CdS/WS2 composite increased the active sites for the gas-sensitive reaction. Additionally, the 2D morphology of CdS/WS2 and the heterojunction formed between WS2 and CdS contributed to the improved performance. Anti-humidity interference tests showed that the CdS/WS2 sample remained stable under real-time monitoring of NH3 at different ambient humidity values. This study paves the way for designing high-performance gas sensors operating at room temperature.

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Self-heated CO gas sensor based on Au-decorated Sb-implanted WS2 nanosheets

Cited by 23 publications

References 43 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

Advances in 2D Materials Based Gas Sensors for Industrial Machine Olfactory Applications

Moisture-Resistant and Highly Selective NH₃ Sensor Based on CdS/WS₂ Composite Heterojunction

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Self-heated CO gas sensor based on Au-decorated Sb-implanted WS2 nanosheets

Cited by 23 publications

References 43 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

Advances in 2D Materials Based Gas Sensors for Industrial Machine Olfactory Applications

Moisture-Resistant and Highly Selective NH3 Sensor Based on CdS/WS2 Composite Heterojunction

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Moisture-Resistant and Highly Selective NH₃ Sensor Based on CdS/WS₂ Composite Heterojunction