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- W3120387717 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 NO2 detection. 2L WSe2 nanosheets deliver the best rapid response compared to ∼5–6L or ∼13–17L. The response of 2L WSe2 at RT is 250, 328, and 361% to 2, 4, and 6 ppm NO2, respectively. The sensor showed nearly the same response toward low NO2 concentration even after 9 months of testing, confirming its remarkable long-term stability. A selectivity study, performed at three working temperatures (RT, 100, and 150 °C), shows high selectivity at 150 and 100 °C. Full selectivity toward NO2 at RT confirms that 2H-WSe2 nanosheet-based sensors are ideal candidates for NO2 gas detection." @default.
- W3120387717 created "2021-01-18" @default.
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- W3120387717 date "2021-01-13" @default.
- W3120387717 modified "2023-10-13" @default.
- W3120387717 title "Robust Room-Temperature NO<sub>2</sub> Sensors from Exfoliated 2D Few-Layered CVD-Grown Bulk Tungsten Di-selenide (2H-WSe<sub>2</sub>)" @default.
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- W3120387717 doi "https://doi.org/10.1021/acsami.0c17924" @default.
- W3120387717 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7880530" @default.
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- W3120387717 hasPublicationYear "2021" @default.
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