Recent progress on Schottky sensors based on two-dimensional transition metal dichalcogenides

Abstract

2D transition metal dichalcogenides (TMDs), such as MoS2, MoSe2, WS2, WSe2, etc. have unique physical, chemical, and mechanical properties and thus they are ideal sensing materials. 2D TMDs-based sensor have...

Recent advances in MoS2-based nanomaterial sensors for room-temperature gas detection: a review

“…NO-2ads + 2NO-3ads → 3NO 2(gas) + O 2(gas) + e - (7) For NO gas, it is also an electron acceptor, and is easily oxidized into NO 2 gas in air.…”

“…Recently, several reports have revealed that the emerging two-dimensional (2D) materials can make sensing response to toxic gases at low/room temperature, which not only solves the problem of high power consumption of traditional gas sensors to a certain extent, but also applies them to flexible wearable electronic devices to provide great convenience and achieve intelligent life. The 2D materials include reduced graphene oxide (rGO) 1 , transition metal dichalcogenides (TMDs) 2 , black phosphorus (BP) 3 , hexagonal boron nitride (h-BN) 4 , and transition metal carbides, nitrides and/or carbonitrides (MXene) 5 , which can be considered as the promising gas sensing materials owing to their unique single-atom layer structure that exhibits high specific surface area close to the theoretical extreme, excellent semiconductor performance, unique surface configurations with dangling bonds on the edge sites, and flexible basal planes [6][7][8][9][10] . Among them, The layered TMDs with the composition structure of MX 2 (M= Ti, Zr, Hf, V, Nb, Ta, Mo, W, Tc, Re, Pd, Pt and X= S, Se, Te) 11 have gained intensive attention in gas sensing materials because of their strong spin-orbit coupling interaction, tunable electronic, and the high interaction ability for the gas molecules adsorption 12,13 .…”

“…Specifically, they exhibit high specific surface area close to the theoretical extreme, excellent semiconductor performance, unique surface configurations with dangling bonds on their edge sites, and flexible basal planes. [6][7][8][9][10] Among them, the layered TMDs with the composition of MX 2 (M = Ti, Zr, Hf, V, Nb, Ta, Mo, W, Tc, Re, Pd, and Pt and X = S, Se, and Te) 11 have gained intensive attention as gas sensing materials because of their strong spin-orbit coupling interaction, tunable electronic properties, and high interaction ability for the adsorption of gas molecules. 12,13 Among the TMDs, the semiconductor MoS 2 and WS 2 with atomically thin-layered structures, lower bandgap, abundant edge active sites, and excellent electrical and/or chemical properties exhibit good gas sensing abilities at room temperature (RT).…”

First-Principles Investigation of Adsorption Behaviors and Electronic, Optical, and Gas-Sensing Properties of Pure and Pd-Decorated GeS2 Monolayers

“…Since gas sensors have widely penetrated every aspect of our daily lives, such as medical and food industries and environmental safety testing, − 2D TMDs are ideal gas sensing materials due to their large specific surface-to-volume ratios, high sensitivity to adsorption of gases, which are available for interactions with gas molecules, abundant active sites to selectively bind gases, and good mechanical properties. − As one of the most common air pollutants, NO x ( x = 1 and 2), which are mainly from the combustion of fossil fuels, are greatly harmful to the environment and human health such as the damage of human respiratory organs and nerves. , Therefore, the development and manufacture of highly sensitive and selective NO x gas sensors is a main challenge for monitoring air quality, especially, for the detection of NO x at parts per billion (ppb) levels for commercial applications in environmental monitoring and healthcare.…”

Influence of Group-IVA Doping on Electronic and Optical Properties of ZnS Monolayer: A First-Principles Study

“…Since the discovery of graphene [ 1 ], more and more two-dimensional (2D) layered materials have been discovered [ 2 , 3 , 4 , 5 , 6 ]. Owing to their distinct electronic, optical, and thermoelectric performance, many studies have been devoted to boosting the practical applications of 2D materials [ 7 , 8 , 9 ]. Among these 2D materials, binary Ⅱ-Ⅵ zinc chalcogenides exhibit the potential for broad applications in optoelectronic and thermoelectric devices [ 10 , 11 , 12 , 13 ].…”