Hollow-Core Photonic Crystal Fibers for Surface-Enhanced Raman Scattering Probes

Figure 10

SERS signal from the detection of 0.1 nM R6G using a LCPCF. Peaks (a) and (c) are from the citrate introduced during the synthesis of SNPs. Peaks (b), (d), (e), (f), (g), (h), (i), (j), (k), and (l) are typical R6G peaks. Specifically, (d) and (e) are split from the 1204 cm⁻¹ peak while (g) and (h) are split from the 1312 cm⁻¹ peak compared to the high concentration SERS spectrum.