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- W2912139741 abstract "Abstract The nano-heterostructures of TiO2/SnO2 and TiO2/CuO thin films have been investigated towards NO2 detection. Thin films have been deposited by reactive magnetron sputtering of metallic targets in Ar + O2 atmosphere. The properties of samples have been characterized by means of X-ray diffraction in grazing incidence GIXRD, X-ray reflectivity XRR, scanning electron microscopy SEM, optical methods and X-ray photoelectron spectroscopy XPS. It has been shown the SnO2 and CuO surface is well developed, with uniformly dispersed polycrystalline nanoparticles of TiO2. The addition of TiO2 thin layer increased the response of SnO2 nanostructure towards NO2. A very high resistance change ~4500 has been demonstrated for TiO2/SnO2 at 150 °C for 4 ppm of NO2, while for the SnO2 sensor the resistance change has been ~2300. The TiO2/SnO2 sensor responses to CO and H2 reducing gases were significantly lower. Such extremely good sensing properties of the n-n heterostructure to NO2 may be assigned to the formed interfaces and higher surface-to-volume ratio. However, TiO2/CuO n-p heterostructures reveal much smaller responses to NO2, what may be attributed to the effect of charge compensation." @default.
- W2912139741 created "2019-02-21" @default.
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- W2912139741 date "2019-06-01" @default.
- W2912139741 modified "2023-10-03" @default.
- W2912139741 title "TiO2/SnO2 and TiO2/CuO thin film nano-heterostructures as gas sensors" @default.
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- W2912139741 doi "https://doi.org/10.1016/j.apsusc.2019.02.139" @default.
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