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

Figure 18

(a, b) Top and side views of the highly branched nanocorals. (c) Single CuO/ZnO nanocorals after hydrothermal growth for 4 h. (d) Current density–voltage characteristics of a typical nanocoral sensor at a different relative humidity (RH); the inset shows the J–V characteristics of the sensor at 85 and 90%RH. (e) DC resistance of a typical nanocoral sensor with increasing humidity and recovery cycle (ascending and descending). (f) Dynamic response of the nanocoral sensor when switched between 96% and 32%RH [84].

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