Fig. 5. Dose–response curves of the Fe2O3 interferometer to hexane (a), acetone (b) and isopropanol (c) respectively. (d) Response curves for hexane, acetone and IPA at different concentrations. The quantity ΔOT/OT (%) is equal to (nLfinal − nLinitial)/nLinitial × 100%, nLfinal and nLinitial represent the optical thickness at time 0 and T, respectively.
