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

Figure 16

Surface morphologies of the (a) CA-CuO nanocomposite films and (b) pellets. (c) Capacitance and resistance-humidity relationships of CA-CuO humidity sensors. (d) Response-recovery behavior of the CA-CuO nanocomposite-based film sensors [80].

(a)

(b)

(c)

(d)