Research Progress on Humidity-Sensing Properties of Cu-Based Humidity Sensors: A Review

Figure 20

(a, b) SEM images of CuO/rGO composites. (c) Response and recovery properties of the sensors fabricated with the CuO/rGO composites. The curves were measured between 11% and 98%RH at 25°C. (d) Impedances of the sensors based on the CuO/rGO composites under different RHs measured at different frequencies [86].

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