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We previously developed a process for the precipitation of pure CaCO3 by exploiting the induction period of one-step mineral carbonation of flue gas desulfurization gypsum. Herein, the process was further investigated to elucidate CaCO3 polymorphism as a function of the addition of ammonia and ethanol using quantitative X-ray diffraction and field-emission scanning electron microscopy. Calcite, which...
Liquid metals based on gallium oxidize under ambient conditions to form a native oxide on the surface. Here we take advantage of the semiconducting properties of this oxide layer for gas sensing applications. In particular, the development of gas sensors that operate at low temperatures is an ongoing challenge. Therefore, to address this problem, we fabricated conductometric sensors based on an oxidized...
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