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Effect of Different Substrates on Performance of Copper Sulfide Thin Film Ammonia Gas Sensor

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Copper sulfide (Cu1.4S) thin films have been grown on Silicon (Si), silicon dioxide (SiO2), stainless steel (SS) and fluorine doped tin oxide (FTO) coated glass substrates by solution growth technique (SGT) at room temperature. The effect of substrate on surface morphology is studied by probing surface morphology using scanning electron microscope (SEM) and atomic force microscope (AFM). It is observed that particle size of copper sulfide is larger on silicon and smaller on FTO substrates. Ammonia gas detection testing is carried out by fabricating resistive sensor element and measuring (in-situ) current–voltage (IV) curves during gas adsorption. In addition, effect of ambient temperature on response of sensor is also studied.
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Document Type: Research Article

Publication date: 2009-08-01

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