In2O3 nanowire mat devices as high performance NO2 gas sensors

2004 ◽  
Vol 828 ◽  
Author(s):  
Daihua Zhang ◽  
Zuqin Liu ◽  
Chongwu Zhou
Keyword(s):  
Oxide Film ◽  
Metal Oxide ◽  
Gas Sensors ◽  
High Performance ◽  
Simple Device ◽  
No2 Gas Sensors ◽  
Metal Oxide Film ◽  
Magnitude Improvement

ABSTRACTA high sensitive and reliable In2O3 nanowire mat devices are fabricated. Detection of NO2 gas down to ppb levels was achieved. This represents orders-of-magnitude improvement over previously reported metal oxide film or nanowire/nanobelt sensors. Furthermore, this simple device shows certain selectivity to NO2 with other common chemicals such as NH3, O2, CO and H2 around.

scholarly journals Design and Growth of Metal Oxide Film as Liquefied Petroleum Gas Sensors

Gas Sensors ◽  
2020 ◽  
Author(s):  
Rakesh Kumar Sonker ◽  
Saroj Radheyshyam Shabajeet ◽  
Rahul Johari ◽  
Balchandra Yadav
Keyword(s):  
Oxide Film ◽  
Metal Oxide ◽  
Gas Sensors ◽  
Liquefied Petroleum Gas ◽  
Metal Oxide Film

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

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2123 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document