Au-doped WO3-based sensor for NO2 detection at low operating temperature

By H. Xia, Yan Wang, Fanhong Kong, Shurong Wang, B. Zhu, Xianzhi Guo, Jun Zhang, Yanmei Wang, Shihua Wu. 2008

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Conductometric gas sensors based on metal oxides modified with gold nanoparticles: a review (2016, unknown): “However, one should note that this advantage is not as important because metal oxides such as SnO2, In2O3, and WO3 are highly sensitive to ozone without the use of any surface modification [126, 127].”
Semiconducting Metal Oxide Based Sensors for Selective Gas Pollutant Detection (2009, methodology): “Modified materials include WO3-Ti [99-101], WO3-Pd, Pt, or Au [102-106], WO3-In2O3 [107], and WO3-Bi2O3 [108] which were used to fabricate selective and sensitive NOx gas sensors.”
Fabrication of highly sensitive gas sensor based on Au functionalized WO3 composite nanofibers by electrospinning (2015, methodology): “Several effective methods, ncluding doping, dimension control and phase structure design, re increasingly being adopted by researchers to further improve he gas sensing performance [3–5].”