Ammonia Gas Sensing Behavior of Hybridization between Reduced Graphene Oxide and Gold Nanoparticles

Figure 5

(a) Ten-cycle responses of the bare rGO, stack, and composite samples to 23.5 ppm NH₃ at room temperature with 40% RH, indicating good stability of the sensors. (b) Four-cycle responses of the composite sample to different concentrations of NH₃ ranges from 18 to 40 ppm under room temperature with 40% RH. (c) The selectivity of the stack and composite sensors to NH₃ gas (fixed concentration of 23.5 ppm) and other target gases. (d) The response of the bare rGO, stack, and composite to 23 ppm NH₃ under RH from 20 to 80%.

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