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- W2896890897 abstract "We present the on-chip fabrication of bilayer Au NP-decorated WO3 nanoporous thin films (B-Au/WO3) via layer-by-layer stacking of a sacrificial colloidal template with periodic Au sputtering deposition. Technical analysis shows that the B-Au/WO3 film is homogeneous and consists of a hexagonally ordered bowl-like structure, whose surface is uniformly decorated with crystalline Au NPs. The B-Au/WO3 sensing film shows a sensitivity of 96.0, a response time of 9.0 s and a recovery time of 16.0 s for 1 ppm NO2 at a low operating temperature of 150 °C. This significantly exceeds performances of bare WO3 counterpart. Also, the B-Au/WO3 sensor demonstrates obviously enhanced sensing responses over operating temperature ranges of 75–225 °C and perfect selectivity to NO2 gas. We proposed a combined sensing mechanism, the surface Au NPs dominated chemical sensitization and inter-bedded Au NP-induced electronic sensitization, to explain the perfect sensing performances in sensitivity, response, and selectivity. The template-mediated approach focuses on precise single-layer control and facilitates direct integration of the sensing film onto the required sensor substrate. The addressed on-chip fabrication strategy along with Au NPs decoration technique might provide promising applications in construction of advanced chemiresistive gas sensors, photocatalysts and electrochromic smart windows." @default.
- W2896890897 created "2018-10-26" @default.
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- W2896890897 date "2019-02-01" @default.
- W2896890897 modified "2023-10-15" @default.
- W2896890897 title "Bilayer Au nanoparticle-decorated WO3 porous thin films: On-chip fabrication and enhanced NO2 gas sensing performances with high selectivity" @default.
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- W2896890897 doi "https://doi.org/10.1016/j.snb.2018.10.065" @default.
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