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Ammonia Sensing Using ZnO, and Zn2SnO4 Nanofiber

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Nanostructured thin films of ZnO and Zn2SnO4 have been grown on Alumina target via a facile atmospheric pressure chemical vapor deposition (CVD) method, using metallic zinc and tin precursors. Different substrates to target distances were investigated and pure hexagonal wurtzite ZnO and high quality Zn2SnO4 mixed metal oxide were grown at 1 and 5 cm, respectively. The structures, morphologies, and specific surface area of the samples were determined by Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and surface area analysis (using BET method), respectively. The ammonia gas sensing properties of the obtained ZnO and Zn2SnO4 were evaluated under exposure to different concentrations of ammonia gas with Au patterned contact electrodes. Our results showed that the obtained Zn2SnO4 nanofiber exhibited good sensitivity at room temperature to low concentrations (ppb) of ammonia which can be potentially used as a resistive gas sensor.
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Keywords: AMMONIA GAS SENSOR; CVD; NANOFIBER; ZN2SNO4

Document Type: Research Article

Publication date: July 1, 2017

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