Optical Properties of Sol-Gel Nb₂O₅ Films with Tunable Porosity for Sensing Applications

Figure 3

(a) Reflectance change in % and (b) refractive index change after exposure to acetone vapors for samples with PE6100 (light magenta) and PE6800 (dark grey). Error bars are deviations from the mean value of four measurements conducted on two samples for each ratio at two different points.

(a)

(b)