An overview: Sensors for low humidity detection

Ma, Zhiyan; Teng, Fei; Zhang, Tong

doi:10.1016/j.snb.2022.133039

Cited by 68 publications

(19 citation statements)

References 170 publications

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“…Regarding the operation, capacitive humidity sensors are the first choice because of their ease of manufacture, low power consumption, high sensitivity, quasi-linear response, and compatibility with modern technology . Thus, despite capacitance mechanisms being considered more complex, their remarkable performance compensates for the drawbacks .…”

Section: Main Types Of Flexible Sensorsmentioning

confidence: 99%

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Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Ferreira,

Silva,

Nunes-Pereira

2024

ACS Sens.

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Due to an ever-increasing amount of the population focusing more on their personal health, thanks to rising living standards, there is a pressing need to improve personal healthcare devices. These devices presently require laborious, time-consuming, and convoluted procedures that heavily rely on cumbersome equipment, causing discomfort and pain for the patients during invasive methods such as sample-gathering, blood sampling, and other traditional benchtop techniques. The solution lies in the development of new flexible sensors with temperature, humidity, strain, pressure, and sweat detection and monitoring capabilities, mimicking some of the sensory capabilities of the skin. In this review, a comprehensive presentation of the themes regarding flexible sensors, chosen materials, manufacturing processes, and trends was made. It was concluded that carbon-based composite materials, along with graphene and its derivates, have garnered significant interest due to their electromechanical stability, extraordinary electrical conductivity, high specific surface area, variety, and relatively low cost.

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Section: Main Types Of Flexible Sensorsmentioning

confidence: 99%

“…Depending on the thickness of the film, sensors can be divided into thin-film types and thick-film types. Thin films allow for smaller sizes and greater sensitivity, while thicker films offer greater durability, cost-effectiveness, and reliable interfacing with other electronic circuitry …”

Section: Main Types Of Flexible Sensorsmentioning

confidence: 99%

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Ferreira,

Silva,

Nunes-Pereira

2024

ACS Sens.

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“…Hence, the development of gas sensors is very important for real-time monitoring of harmful gas leakage and environmental protection. [1][2][3][4] In order to meet the growing demand for high performance sensors, it is imperative to design and manufacture efficient sensing materials that can provide high sensing activity and response to target gases quickly and accurately.…”

Section: Doi: 101002/adfm202305253mentioning

confidence: 99%

Enhanced Sensitivity of ZnFe₂O₄ Based on Ordered Magnetic Moment Induced by Magnetic Field: A New Insight into Mechanism

Zhang,

Cao,

Wang

et al. 2023

Adv Funct Materials

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Semiconductor gas sensor mainly relies on the interaction between sensitive materials and gas to obtain gas information. Deep insight into the interaction mechanism is increasingly important for designing high performance gas sensors. Here, ZnFe2O4 microspheres (MSs) are utilized with tunable magnetism through the assistance of magnetic field to study the essential elements of sensitive processes. The gas sensing properties of ZnFe2O4 MS under different applied magnetic field intensities and various gaseous environments are systematically investigated. The results suggest that ordered magnetic moment induced by magnetic field promotes the probability of contact and reaction between gases and sensitive materials, thus significantly improving the sensitivity. Especially, ZnFe2O4 annealed at 500 °C sensor under the action of 54.6 mT magnetic field exhibits excellent ethanol detection performance (S = 67.8), which is ≈4 times higher than that without magnetic field. By carefully analyzing the experimental results, this research proposes a new physical model called “port docking” to re‐explain the sensitivity mechanism. This work systematically studies the role of the magnetic moment in the sensing process, and provides a new idea for designing high‐performance gas sensors.

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“…In biological and electrochemical systems, electron transfer (ET) through the interfacial aqueous layers is a fundamental process. , Numerous experimental studies and numerical simulations have revealed that water molecules promote ET in the short range. − The effect of water molecules on ET has been recognized for a long time; however, it has rarely been utilized in humidity sensor designs. Recently, resistive humidity sensors have attracted considerable attention owing to the requirements for integrated and flexible devices for various applications. , The sensing mechanism of resistive humidity sensors is usually ascribed to the doping effect of H 2 O; the resistance of the sensors is decreased by electron injection from the adsorbed H 2 O. , However, the effect of doping on the resistance change of sensors in the case of the multilayer adsorption of H 2 O is questionable. It has been proposed that the promotion of ET through H 2 O contributes to the sensing of electronic humidity.…”

Section: Introductionmentioning

confidence: 99%

Efficient Electron Transfer through Interfacial Water Molecules across Two-Dimensional MoO₃ for Humidity Sensing

Jiang,

Su,

Zheng

et al. 2024

ACS Appl. Mater. Interfaces

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Resistive humidity sensors are required in flexible and integrated devices. Two-dimensional MoO 3 offers a large interface area, enabling the modulation of its electrical properties over a wide range. In this study, 2D MoO 3 was synthesized via liquid-phase exfoliation for humidity-sensing tests. In terms of high sensitivity, negligible hysteresis, linearity, and stability, the humidity-sensing performance of MoO 3 is superior to those of other materials. The sensitivity reaches 9794 Ω/RH at 25 °C. The sensing mechanism of MoO 3 was investigated by using impedance spectra and voltage−current scans under different humidity levels. The results indicate that the resistance change of MoO 3 due to humidity originates from the interfacial conductance. Interfacial H 2 O adsorption induces efficient conducting paths via hydrogen bonding, decreases the potential barrier for electron transfer, and supplies additional electron states to the valence bands. In this study, electronic humidity sensing was investigated in depth, and a new perspective was proposed for electronic humidity sensing.

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An overview: Sensors for low humidity detection

Cited by 68 publications

References 170 publications

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Enhanced Sensitivity of ZnFe₂O₄ Based on Ordered Magnetic Moment Induced by Magnetic Field: A New Insight into Mechanism

Efficient Electron Transfer through Interfacial Water Molecules across Two-Dimensional MoO₃ for Humidity Sensing

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An overview: Sensors for low humidity detection

Cited by 68 publications

References 170 publications

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Enhanced Sensitivity of ZnFe2O4 Based on Ordered Magnetic Moment Induced by Magnetic Field: A New Insight into Mechanism

Efficient Electron Transfer through Interfacial Water Molecules across Two-Dimensional MoO3 for Humidity Sensing

Contact Info

Product

Resources

About

Enhanced Sensitivity of ZnFe₂O₄ Based on Ordered Magnetic Moment Induced by Magnetic Field: A New Insight into Mechanism

Efficient Electron Transfer through Interfacial Water Molecules across Two-Dimensional MoO₃ for Humidity Sensing