Electrospun Zinc Oxide Nanofiber Based Resistive Gas/Vapor Sensors - A Review
Niranjan N Prabhu, R. B. Jagadeesh Chandra, B V Rajendra, Gibin George, Abdel-Hamid I Mourad and B Shivamurthy
Niranjan N Prabhu1
R. B. Jagadeesh Chandra2
B V Rajendra3
Gibin George4
Abdel-Hamid I Mourad5
B Shivamurthy1,*,Email
1Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India
2Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576 104, India
3Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576 104, India
4Department of Mechanical Engineering, SCMS school of Engineering & Technology, Vidya Nagar, Palissery, Karukutty, Ernakulam, Kerala, 683576, India
5Department of Mechanical Engineering, United Arab Emirates University, Al Ain, 15551, UAE
Abstract
Resistive ZnO sensors play a pivotal role in detecting various gases and vapours due to their high response, low cost, stability, tunability, and simple fabrication. The sensitivity is determined by the reactions at the surface of the NF hence the surface area defines the foremost sensor characteristics. Electrospun metal oxide NFs exhibit a high surface area and unique electrical properties that can be tuned, and they are highly sought as the materials for resistive gas sensors. Various strategies are adopted to improve the sensitivity and selectivity of ZnO NFs. This review summarizes the recent methods followed to improve the sensitivity, also discussed the influence of process parameters on the structure and morphology of ZnO NFs. The mechanism of gas sensing and highlighted its improvement through advanced methods. The sensitivity of the NF improved through tuning the structure and morphology of NFs and doping. Further, modification of NF sensitivity through functionalization, addition of carbon nanomaterials, and high-energy irradiation are also discussed. Based on the recent literature, the doped ZnO NF performance for various gas sensors is highlighted. The outcome of this review gives input to academic researchers and industries for further investigation and development in resistive gas sensors and their applications.
Publication details
Received: 29 Nov 2021
Revised: 22 Dec 2021
Accepted: 06 Jan 2022
Published online: 06 Jan 2022
Article type:
Review Paper
DOI:
10.30919/es8d612
Volume:
19
Page:
59-82
Citation:
Engineered Science, 2022, 19, 59-82
Permissions:
Copyright
Number of downloads:
3226
Citation Information:
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Description:
This study on ZnO electrospun nanofiber for gas sensors highlights the influence of surface area of ....
This study on ZnO electrospun nanofiber for gas sensors highlights the influence of surface area of nanofiber on sensing response, morphology of the nanofiber suitable for doping, and improved sensitivity.
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