MoS2 functionalized AlGaN/GaN transistor based room temperature NO2 gas sensor

A comprehensive review of gallium nitride (GaN)-based gas sensors and their dynamic responses

“…2(f)). 89 The MoS 2 layer could overcome obstacles in monitoring toxic gases present in the atmosphere at room-temperature, and it enhanced the response sensitivity and selectivity of the sensor. The proposed device operated at 25 1C with a detection range of NO 2 from 1 ppm to 100 ppm.…”

Recent progress on group III nitride nanostructure-based gas sensors

“…128 Table 3 presents a comparison of the different gas sensors functionalized with nanostructures recently reported in literature. 137 Due to band offset, spontaneous and piezoelectric polarization at the AlGaN/GaN interface, a 2DEG is formed underneath an AlGaN barrier layer. 44,59,138 This 2DEG was successfully employed in a high electron mobility transistor (HEMT) for high-power and high-temperature electronic devices such as automotive, aerospace, and power industries.…”

“…Comparison of sensing responses of NO 2 gas recently reported in the literature137 [reproduced with permission from ref.137 from Elsevier] …”

Carrier-Type Switching with Gas Detection Using a Low-Impedance Hybrid Sensor of 2D Graphene Layer and MoOx Nanorod 3D Network

“…The development of low-dimensional materials, such as SnS zero-dimensional (0D) nanodot, nanotubes, MoS 2 , and VS 2 two-dimensional (2D) nanosheets, oxide/sulfide (or selenide) nanocomposites, and rGO/SnO 2 superstructures of materials, − has received much attention and promoted the development of new electronic sensor devices with enhanced sensitivity, , selectivity, and room temperature operation, thus overcoming the limitations of traditional gas sensors. , Among these low-dimensional materials, graphene has attracted the research interest from scientists in both academia and industry. , Graphene has several unique material properties, including high electrical conductivity, ideal field-effect carrier mobility up to 200,000 cm 2 /Vs, and very high in-plane chemical stability because it consists of short and strong covalent bonds. This variety of physical and chemical characteristics ,− makes them competitive candidates as next-generation sensors, overtaking existing silicon-based molecular chemical sensors and biosensors.…”