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Review
. 2021 Dec 24:9:811074.
doi: 10.3389/fchem.2021.811074. eCollection 2021.

Light-Assisted Enhancement of Gas Sensing Property for Micro-Nanostructure Electronic Device: A Mini Review

Zongtao Ma  1 , Ziying Wang  2   3 , Lingxiao Gao  2   3
Affiliations
Review

Light-Assisted Enhancement of Gas Sensing Property for Micro-Nanostructure Electronic Device: A Mini Review

Zongtao Ma et al. Front Chem. .

Abstract

In recent years, gas sensing electronic devices have always attracted wide attention in the field of environment, industry, aviation and others. In order to improve the gas sensing properties, many micro- and nano-fabrication technologies have been proposed and investigated to develop high-performance gas sensing devices. It is worth noting that light irradiation is an effective strategy to enhance gas sensitivity, shorten the response and recovery time, reduce operating temperature. In this review, firstly, the latest research advances of gas sensors based on different micro-nanostructure materials under UV light and visible light activation is introduced. Then, the gas sensing mechanism of light-assisted gas sensor is discussed in detail. Finally, this review describes the present application of gas sensors with improved properties under light activation assisted conditions and the perspective of their applications.

Keywords: gas sensing devices; light irradiation; metal oxide semiconductor; micro-nanostructure; sensor.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
(A) Microscopic characterization of MoS2 and gas sensing performance under white light, Simulation results for the Flat-MoS2 and Cone-Shaped-MoS2 gas sensors by finite difference time domain (FDTD) illuminated by the light with the wavelength of 550 nm. Reproduced with permission from ref. 13. Copyright 2019, Royal Society of Chemistry. (B) Schematic illustrations of edge-enriched SnS2 NFs for visible light activated NO2 gas sensor. Reproduced with permission from ref. 14. Copyright 2021, Royal Society of Chemistry. (C) Sensing performance of MoS2 and MoS2-Au sensors toward NO2 gas with no UV illumination. Reproduced with permission from ref. 17. Copyright 2018, American Institute of Physics. (D) Schematic illustration for (left) the experimental procedures to fabricate nanofiber pattern (NF-P) sensors via near-field electrospinning (NFES) and (right) NO2 detection of nanofiber pattern (NF-P) sensors under visible light illumination. Reproduced with permission from ref. 18. Copyright 2021, WILEY-VCH.
See this image and copyright information in PMC

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