Gas sensing mechanisms of metal oxide semiconductors: a focus review

This review organizes and introduces several common gas sensing mechanisms of metal oxide semiconductors in detail and classifies them into two categories. The scope and relationship of these mechanisms are clarified.

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Recent advances and perspectives on constructing metal oxide semiconductor gas sensing materials for efficient formaldehyde detection

Journal of Materials Chemistry C ◽

10.1039/d0tc03750h ◽

2020 ◽

Vol 8 (38) ◽

pp. 13169-13188

Author(s):

Zejun Han ◽

Yuan Qi ◽

Zhengyi Yang ◽

Hecheng Han ◽

Yanyan Jiang ◽

...

Keyword(s):

Metal Oxide ◽

Gas Sensing ◽

Metal Oxide Semiconductor ◽

Detection Performance ◽

Metal Oxide Semiconductors ◽

Oxide Semiconductor ◽

Oxide Semiconductors ◽

Effective Strategies ◽

Recent Advances

The sensing mechanisms and effective strategies for enhancing the formaldehyde detection performance of metal oxide semiconductors have been reviewed.

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Metal-oxide semiconductors for carbon monoxide (CO) gas sensing: A review

Applied Materials Today ◽

10.1016/j.apmt.2019.100483 ◽

2020 ◽

Vol 18 ◽

pp. 100483 ◽

Cited By ~ 11

Author(s):

Sunil Mahajan ◽

Shweta Jagtap

Keyword(s):

Carbon Monoxide ◽

Metal Oxide ◽

Gas Sensing ◽

Metal Oxide Semiconductors ◽

Oxide Semiconductors ◽

Co Gas

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Progress of Research on Preparation of Micro Gas Sensors of Metal Oxide Semiconductors

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.143-144.562 ◽

2011 ◽

Vol 143-144 ◽

pp. 562-566 ◽

Cited By ~ 2

Author(s):

Wen An ◽

Chun Ying Yang

Keyword(s):

Metal Oxide ◽

Gas Sensors ◽

Gas Sensing ◽

Sol Gel ◽

Dip Coating ◽

Metal Oxide Semiconductors ◽

Preparation Technique ◽

Fabrication Technique ◽

Oxide Semiconductors ◽

Existing Problems

New progress of research on the preparation technique of micro gas sensors of metal oxide semiconductors is introduced, such as the chemical treatment of the gas sensing film, the deposited technique of gas sensing film in the oxygen radical assisted EB evaporation, the technique of the multilayered film, the fabrication technique of the thermally oxidized, the technique of the electrode configuration, the fabrication technique of the miniaturized arrays by micro-molding in capillaries, the dip-coating of the sol-gel. And their features will be analyzed respectively, and their existing problems and future development directions will be given.

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Synthesis Methods, Microscopy Characterization and Device Integration of Nanoscale Metal Oxide Semiconductors for Gas Sensing

Sensors ◽

10.3390/s91007866 ◽

2009 ◽

Vol 9 (10) ◽

pp. 7866-7902 ◽

Cited By ~ 19

Author(s):

Randy Vander Wal ◽

Gordon Berger ◽

Michael Kulis ◽

Gary Hunter ◽

Jennifer Xu ◽

...

Keyword(s):

Metal Oxide ◽

Gas Sensing ◽

Metal Oxide Semiconductors ◽

Synthesis Methods ◽

Oxide Semiconductors ◽

Device Integration ◽

Microscopy Characterization

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Graphene-enhanced metal oxide gas sensors at room temperature: a review

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.9.264 ◽

2018 ◽

Vol 9 ◽

pp. 2832-2844 ◽

Cited By ~ 37

Author(s):

Dongjin Sun ◽

Yifan Luo ◽

Marc Debliquy ◽

Chao Zhang

Keyword(s):

Metal Oxide ◽

Gas Sensors ◽

Room Temperature ◽

Gas Sensing ◽

Metal Oxide Semiconductors ◽

Oxide Semiconductors ◽

Sensing Material ◽

Metal Oxide Gas Sensors ◽

Low Sensitivity ◽

Sensing Performance

Owing to the excellent sensitivity to gases, metal-oxide semiconductors (MOS) are widely used as materials for gas sensing. Usually, MOS gas sensors have some common shortages, such as relatively poor selectivity and high operating temperature. Graphene has drawn much attention as a gas sensing material in recent years because it can even work at room temperature, which reduces power consumption. However, the low sensitivity and long recovery time of the graphene-based sensors limit its further development. The combination of metal-oxide semiconductors and graphene may significantly improve the sensing performance, especially the selectivity and response/recovery rate at room temperature. In this review, we have summarized the latest progress of graphene/metal-oxide gas sensors for the detection of NO2, NH3, CO and some volatile organic compounds (VOCs) at room temperature. Meanwhile, the sensing performance and sensing mechanism of the sensors are discussed. The improved experimental schemes are raised and the critical research directions of graphene/metal-oxide sensors in the future are proposed.

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