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A systematic comparison of sol–gel prepared titanium dioxide (TiO 2 ), WO 3 , and MoO 3 single metal oxide based gas sensors was conducted. Process variables such as solution concentration, deposition parameters, gelling time, annealing time and temperature, remained constant. Sensors based on binary compound MoO 3 –TiO 2 and MoO 3 –WO 3 were...
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