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. 2020 Nov 10;420:127655. doi: 10.1016/j.cej.2020.127655

Fig. 6.

Fig. 6

Effect of 30 nm-thick Au and GO-decorated Au (30 nm) partially coated on unclad FBG spectra. Different amplitudes obtained are due to SPR of the coated layers (a), The detected spectra of GO decorated Au/FBG probe when exposes to air, distilled water, and healthy saliva. The inset shows the wavelength and intensity changes of the probe (b).