Figure 5.
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Standard sensor calibration test in spectral interrogation scheme, by injecting different weight percentage concentration of glycerol in distilled water (0.1–0.5% w/v). Reflectance spectra of sensor device with different weight percentage of glycerol. Angle of incidence is set to 30°. The refractive index difference between DI water and the level of glycerol concentration evaluated is shown in the legend.
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