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

Figure 12

(a) Impedance changes of CuO nanosheets of different sizes with humidity. (b) Sensitivity of CuO nanosheets of different sizes varies with humidity. (c) Hysteresis characteristic of CuO sensors at different RH (1 μm). (d) The response/recovery behavior and repeatability of CuO sensors (1 μm) [70].

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