Recent advances in carbon material-based NO2 gas sensors

This review summarizes the recent research on nitride nanostructures and their applications. We cover recent advances in the synthesis and growth of porous structures and low-dimensional nitride nanostructures via metal-assisted photochemical etching and molecular beam epitaxy. The growth of nitride materials on various substrates, which improves their crystal quality, doping efficiency, and flexibility of tuning performance, is discussed in detail. Furthermore, the recent development of In(Ga)N nanostructure applications (light-emitting diodes, lasers, and gas sensors) is presented. Finally, the challenges and directions in this field are addressed.

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Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Advanced Functional Materials ◽

10.1002/adfm.202104288 ◽

2021 ◽

pp. 2104288

Author(s):

Yunjian Guo ◽

Xiao Wei ◽

Song Gao ◽

Wenjing Yue ◽

Yang Li ◽

...

Keyword(s):

Carbon Material ◽

Electronic Skin ◽

Recent Advances

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Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Sensors ◽

10.3390/s19092123 ◽

2019 ◽

Vol 19 (9) ◽

pp. 2123 ◽

Cited By ~ 13

Author(s):

Wenli Li ◽

Yong Zhang ◽

Xia Long ◽

Juexian Cao ◽

Xin Xin ◽

...

Keyword(s):

Gas Sensors ◽

High Performance ◽

Density Functional ◽

Room Temperature ◽

Mos2 Nanosheets ◽

Mechanical Exfoliation ◽

High Responsivity ◽

Recovery Behavior ◽

No2 Gas Sensors ◽

No2 Detection

The unique properties of MoS2 nanosheets make them a promising candidate for high-performance room temperature gas detection. Herein, few-layer MoS2 nanosheets (FLMN) prepared via mechanical exfoliation are coated on a substrate with interdigital electrodes for room-temperature NO2 detection. Interestingly, compared with other NO2 gas sensors based on MoS2, FLMN gas sensors exhibit high responsivity for room-temperature NO2 detection, and NO2 is easily desorbed from the sensor surface with an ultrafast recovery behavior, with recovery times around 2 s. The high responsivity is related to the fact that the adsorbed NO2 can affect the electron states within the entire material, which is attributed to the very small thickness of the MoS2 nanosheets. First-principles calculations were carried out based on the density functional theory (DFT) to verify that the ultrafast recovery behavior arises from the weak van der Waals binding between NO2 and the MoS2 surface. Our work suggests that FLMN prepared via mechanical exfoliation have a great potential for fabricating high-performance NO2 gas sensors.

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