Abstract
In this study, an array sensor is investigated to employ graphene oxide (GO) and nanostructured SnO2, and their composite films for agriculture applications. A series of electrodes was fabricated to create a high density of sensing array in a small size chip. Individual films under various mixing ratios of GO and SnO2 were deposited via electrophoretic deposition (EPD). Formaldehyde gas was employed to explore sensing behavior and the concentration was kept to 100 ppm. The composition gradients in sensing layers can provide unique response pattern according to oxide mixture ratio.
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