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

Figure 21

(a) The dependence of impedance on RH for pure and KCl-doped Cu–Zn/CuO–ZnO nanoparticles measured at 1 V, 100 Hz, and the inset shows the structure of the humidity sensor applied in our measurement. (b) Response of KCl-doped Cu–Zn/CuO–ZnO nanoparticles measured at 1 V, 100 Hz. (c) Hysteresis of KCl-doped Cu–Zn/CuO–ZnO nanoparticles measured at 1 V, 100 Hz. (d) Long-term stability of KCl-doped Cu–Zn/CuO–ZnO nanoparticles measured at 1 V, 100 Hz [87].

(a)

(b)

(c)

(d)