Vladimiras Bondarenka, R. Sereika, A. Mironas, S. Grebinskij, Xerogels of Ammonium Polyvanadatomolybdate as Starting Material for Ammonia Gas Sensors, ILCPA Volume 50, International Letters of Chemistry, Physics and Astronomy (Volume 50)
https://www.scipress.com/ILCPA.50.71
Abstract:
    The various gas sensors were designed for detection of different gases in the air using different oxides and impurities [1-3]. For example the manufacturing of ammonia sensors on the basis of Cu<sub>x</sub>S-micro-porous-Si structure includes manufacture of micro-porous silicon, drawing on it of SiO<sub>2</sub> isolating layer, and then the Cu<sub>x</sub>S layer [4, 5]. The special equipment for all these processes is needed. More usable method for sensor production is so-called soft chemistry or sol–gel synthesis [6, 7].
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