Atomic‐Layered Tungsten Diselenide‐Based Porous 3D Architecturing for Highly Sensitive Chemical Sensors

Abstract

Two‐dimensional (2D) tungsten diselenide (WSe2)‐based porous three‐dimensional (3D) architecture is fabricated utilizing highly porous 3D alumina structures. The architecture is produced by combining a sol–gel process for fabricating porous 3D alumina and chemical vapor deposition (CVD) for the formation of WSe2. The gas‐sensing performance of the porous 3D structure overcomes the limitations displayed by the gas response of a 2D WSe2‐based gas sensor. This 2D nanomaterials‐based porous 3D architecture is a promising approach for improving the gas response of sensing devices.

Chemical vapor deposition growth of graphene and other nanomaterials with 3D architectures towards electrocatalysis and secondary battery-related applications

“…Inspired by the aforementioned substrates used for the growth of 3D graphene materials, various high melting inorganic oxide substrates ( e.g. , TiO 2 , 71 SiO 2 , 72 Al 2 O 3 73 ) have been used to grow 3D TMDCs with specific structures and properties for multifunctional applications. For example, Wang et al selected MgO powders as substrates, mixed vanadium chloride and tellurium powders as precursors and realized the direct growth of metallic VTe 2 shell structures via a CVD route at ∼650 °C for 15 min.…”

Light‐Assisted and Gate‐Tunable Oxygen Gas Sensor Based on Rhenium Disulfide Field‐Effect Transistors

“…Currently, 2D materials are being intensively studied for use in gas sensor devices because of their chemical, physical, optical, and electronic features. [ 13–16 ] In other words, 2D materials are promising platforms for gas sensing devices because of their naturally high surface‐area‐to‐volume ratio, which results in high sensitivity. In particular, transition metal dichalcogenides (TMDCs) have a finite bandgap in the 0.2–3.0 eV range depending on the constituent materials and their numbers of layers, [ 17–19 ] and they could be used for an FET‐based gas sensor.…”

Gate-controlled gas sensor utilizing 1D–2D hybrid nanowires network

“…Their ultrathin thickness contributes a high specific surface area and a large number of reactive sites for charge transfer between gas molecules and the sensing material ( Dey, 2018 ; Donarelli and Ottaviano, 2018 ; McAlpine et al., 2007 ; Shalev, 2017 ; Yan et al., 2020 ). Based on these structural features, low operating temperature (near room temperature) has been reported for sensors based on 2D materials, especially transition metal dichalcogenides (TMDs), such as MoS 2 , WSe 2 , and SnSe 2 ( Cho et al., 2015 , 2016 ; Choi et al., 2017 ; Cui et al., 2020 ; Dey, 2018 ; Kang et al., 2019 ; Moumen et al., 2021 ; Ricciardella et al., 2017 ; Liu et al., 2021 ). However, there are several challenges that should be addressed, such as irreversible sensing behavior, slow response and recovery time, and high oxidation rate at high operating temperature ( Camargo Moreira et al., 2019 ; Li et al., 2012 ; Yan et al., 2018 ).…”