Robust Room-Temperature NO₂ Sensors from Exfoliated 2D Few-Layered CVD-Grown Bulk Tungsten Di-selenide (2H-WSe₂).

ABSTRACT: We report a facile and robust room-temperature NO₂ sensor fabricated using bi- and multi-layered 2H variant of tungsten di-selenide (2H-WSe₂) nanosheets, exhibiting high sensing characteristics. A simple liquid-assisted exfoliation of 2H-WSe₂, prepared using ambient pressure chemical vapor deposition, allows smooth integration of these nanosheets on transducers. Three sensor batches are fabricated by modulating the total number of layers (L) obtained from the total number of droplets from a homogeneous 2H-WSe₂ dispersion, such as ∼2L, ∼5-6L, and ∼13-17L, respectively. The gas-sensing attributes of 2H-WSe₂ nanosheets are investigated thoroughly. Room temperature (RT) experiments show that these devices are specifically tailored for NO

SUBMITTER: Moumen A 

PROVIDER: S-EPMC7880530 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature