Highly sensitive and low detection limit of resistive NO2 gas sensor based on a MoS2/graphene two-dimensional heterostructures

Vertically aligned carbon nanotubes, MoS2–rGo based optoelectronic hybrids for NO2 gas sensing

“…Hence, it poses serious health problems in the human population and an argent monitoring of NO 2 pollutants is highly in need of developing 2 . Therefore, efficient detection of the NO 2 gas and development of the high performance semiconductor based sensors as promising candidates are crucial for protection of human health 3 . Atomic thickness and high surface-to-volume ratio of two-dimensional (2d) materials make them good candidates for gas sensing applications because their electronic transport properties are highly dependent on the surrounding atmosphere [4][5][6] .…”

MoS2 Nanosheets Sensitized with Quantum Dots for Room-Temperature Gas Sensors

“…Recently, MoS 2 -based nanocomposites or hybrids through surface modification with noble metals [11], architecture design of hetero-nanostructures with metal oxide nanoparticles [22,23], and functionalization with other 2D-layered materials such as graphene [24][25][26][27][28] have been demonstrated with improved sensitivity and fast response/ recovery kinetics. Motivated by this strategy, we proposed to improve the room-temperature response and recovery by sensitizing MoS 2 nanosheets with quantum dots (QDs), a highly tunable zero-dimensional (0D) nanomaterial with size-dependent bandgap and excellent solution processability [29][30][31][32][33][34][35].…”

Highly Sensitive, Selective, Stable, and Flexible NO2 Sensor Based on GaSe

“…2D materials, consisting of a single or several atomic layers such as graphene, [ 12 ] transition metal dichalcogenides (TMDs), [ 13–16 ] or GaSe, [ 17–21 ] represent an emergent class of materials with extraordinary electronic and physicochemical properties, and are a highly attractive prospect for chemiresistor gas sensors. [ 12,17,22–28 ] The gas‐sensing properties of graphene, [ 29–31 ] MoS 2 , [ 25,32 ] MoSe 2 , [ 33 ] MoTe 2 , [ 34,35 ] WS 2 , [ 36 ] SnS 2 , [ 37,38 ] PtS 2 , [ 39 ] PtSe 2 , [ 40 ] black phosphorus, [ 41 ] as well as graphene/MoS 2 heterostructures [ 42,43 ] have been the subjects of recent investigations. GaSe, a layered metal–monochalcogenide III–VI semiconductor, shows excellent electrical and optical properties, [ 13,17,44 ] such as a high on/off ratio, [ 45,46 ] high Hall mobility, [ 45,47 ] upconversion luminescence, [ 48 ] high photoresponsivity, a giant and linear piezophototronic response, [ 49,50 ] and strong second‐harmonic generation, [ 51 ] thus making it a great candidate material for applications in nonlinear optics, terahertz devices, sensors, and spintronics.…”