Gallium Nitride (GaN) Nanostructures and Their Gas Sensing Properties: A Review

Sensors
Md Ashfaque Hossain Khan, Mulpuri V Rao

Abstract

In the last two decades, GaN nanostructures of various forms like nanowires (NWs), nanotubes (NTs), nanofibers (NFs), nanoparticles (NPs) and nanonetworks (NNs) have been reported for gas sensing applications. In this paper, we have reviewed our group's work and the works published by other groups on the advances in GaN nanostructures-based sensors for detection of gases such as hydrogen (H2), alcohols (R-OH), methane (CH4), benzene and its derivatives, nitric oxide (NO), nitrogen dioxide (NO2), sulfur-dioxide (SO2), ammonia (NH3), hydrogen sulfide (H2S) and carbon dioxide (CO2). The important sensing performance parameters like limit of detection, response/recovery time and operating temperature for different type of sensors have been summarized and tabulated to provide a thorough performance comparison. A novel metric, the product of response time and limit of detection, has been established, to quantify and compare the overall sensing performance of GaN nanostructure-based devices reported so far. According to this metric, it was found that the InGaN/GaN NW-based sensor exhibits superior overall sensing performance for H2 gas sensing, whereas the GaN/(TiO2-Pt) nanowire-nanoclusters (NWNCs)-based sensor is better for ethanol ...Continue Reading

References

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Oct 28, 2019·ACS Omega·Bagavath Chandran, Kumar Janakiraman

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Citations

Jan 23, 2021·Sensors·Md Ashfaque Hossain KhanMulpuri V Rao
Mar 7, 2021·Nanomaterials·Maciej KrawczykHelena Teterycz
Jul 5, 2021·Journal of Colloid and Interface Science·Jianan WangRob Atkin
Nov 13, 2021·Journal of the American Chemical Society·Johannes D BartlBernhard Rieger

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