Experimental investigations on barium titanate nanocomposite thin films as an opto-electronic humidity sensor

Figures & data

Figure 1. SEM image of BaTiO₃ nanocomposite thin film.

Figure 2. XRD of BaTiO₃ film.

Figure 3. UV-Visible absorption spectrum of BaTiO₃ gel.

Figure 4. Characteristic curve showing variations in the ratio I _r/I _i with those in μ _a at an angle of incidence θ _i = 60° for μ _g = 1.52.

Figure 5. Variation in intensity of light with %RH for BaTiO₃ thin film at θ_i  = 52°.

Figure 6. Variation in intensity of light with %RH for BaTiO₃ thin film at θ _i = 55°.

Figure 7. Ageing effect of BaTiO₃ nanocomposite thin film.

Figure 8. (a) At lower humidity (surface adsorption), (b) at intermediate humidity (adsorption on capillary walls) and (c) at higher humidity (full capillary condensation).