scholarly journals Long Term Stability Of Metal Oxide-Based Gas Sensors For E-nose Environmental Applications: an overview

2009 ◽  
Author(s):  
Anne-Claude Romain ◽  
Jacques Nicolas ◽  
Matteo Pardo ◽  
Giorgio Sberveglieri
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
Environmental Applications ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Self-Assembled Monolayers Coated Porous SnO2 Film Gas Sensor with Reduced Humidity Influence

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 610
Author(s):  
Cheonji Lee ◽  
Sunjong Oh ◽  
Seung-Chul Park ◽  
Ho-Nyun Lee ◽  
Hyun-Jong Kim ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Surface Area ◽  
Gas Sensors ◽  
High Surface ◽  
Stability Limit ◽  
Sno2 Film ◽  
Water Contact ◽  
Term Stability ◽  
Long Term Stability

Metal-oxide sensors, detect gas through the reaction of surface oxygen molecules with target gases, are promising for the detection of toxic pollutant gases, combustible gases, and organic vapors; however, their sensitivity, selectivity, and long-term stability limit practical applications. Porous structure for increasing surface area, adding catalyst, and altering the operation temperature are proposed for enhancing the sensitivity and selectivity. Although humidity can significantly affect the property and stability of the sensors, studies focusing on the long-term stability of gas sensors are scarce. To reduce the effects of humidity, 1H, 1H, 2H, 2H–perfluorooctyltriethoxysilane (PFOTS) was coated on a porous SnO2 film. The interconnected SnO2 nanowires improved the high surface area, and the PFOTS coating provided superhydrophobicity at water contact angle of 159°and perfect water vapor repellency inside E-SEM. The superhydrophobic porous morphology was maintained under relative humidity of 99% and operating temperature of 300 °C. The CO gas sensing of 5, 20, and 50 ppm were obtained with linearity at various humidity. Flame detection was also achieved with practical high humidity conditions. These results suggest the simple way for reliable sensing of nanostructured metal-oxide gas sensors with high sensitivity and long-term stability even in highly humid environments.

Novel quaternary oxide semiconductor for the application of gas sensors with long-term stability

2021 ◽  
Author(s):  
Chong Wang ◽  
Yiqun Zhang ◽  
Lianjing Zhao ◽  
Chenguang Wang ◽  
Fangmeng Liu ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Oxide Semiconductor ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Metal–Oxide Nanowire Molecular Sensors and Their Promises

Chemosensors ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 41
Author(s):  
Hao Zeng ◽  
Guozhu Zhang ◽  
Kazuki Nagashima ◽  
Tsunaki Takahashi ◽  
Takuro Hosomi ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Power Consumption ◽  
Low Power ◽  
High Surface ◽  
Low Power Consumption ◽  
Ultra Low Power ◽  
Molecular Sensors ◽  
Term Stability ◽  
Long Term Stability

During the past two decades, one–dimensional (1D) metal–oxide nanowire (NW)-based molecular sensors have been witnessed as promising candidates to electrically detect volatile organic compounds (VOCs) due to their high surface to volume ratio, single crystallinity, and well-defined crystal orientations. Furthermore, these unique physical/chemical features allow the integrated sensor electronics to work with a long-term stability, ultra-low power consumption, and miniature device size, which promote the fast development of “trillion sensor electronics” for Internet of things (IoT) applications. This review gives a comprehensive overview of the recent studies and achievements in 1D metal–oxide nanowire synthesis, sensor device fabrication, sensing material functionalization, and sensing mechanisms. In addition, some critical issues that impede the practical application of the 1D metal–oxide nanowire-based sensor electronics, including selectivity, long-term stability, and low power consumption, will be highlighted. Finally, we give a prospective account of the remaining issues toward the laboratory-to-market transformation of the 1D nanostructure-based sensor electronics.

A facile PDMS coating approach to room-temperature gas sensors with high humidity resistance and long-term stability

2020 ◽  
Vol 325 ◽  
pp. 128810 ◽  
Author(s):  
Zhimin Gao ◽  
Guoshuai Song ◽  
Xuemin Zhang ◽  
Qian Li ◽  
Shuang Yang ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
High Humidity ◽  
Term Stability ◽  
Long Term Stability ◽  
Humidity Resistance ◽  
Pdms Coating

Long-term stability of SnO2 gas sensors: The role of impurities

2008 ◽  
Author(s):  
R.G. Pavelko ◽  
A.A. Vasiliev ◽  
X. Vilanova ◽  
V.G. Sevastyanov
Keyword(s):  
Gas Sensors ◽  
Term Stability ◽  
Long Term Stability
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