Hollow-Core Photonic Crystal Fibers for Surface-Enhanced Raman Scattering Probes
Figure 5
(a) Curve A: background Raman spectrum of the HCPCF. Curve B: R6G Raman spectrum obtained using a HCPCF SERS probe without the postfabrication processing; the HCPCF was dipped into the nanoparticle/R6G solution. Curve C: subtraction of Curve A from Curve B showing the net R6G Raman signal. (b) Human insulin SERS spectrum obtained using a LCPCF SERS probe after the postfabrication processing. The fiber background has been subtracted. (c) Comparison of SERS intensities between tryptophan obtained from the postprocessed LCPCF SERS probe and that obtained directly from a dried nanoparticle/analyte film.
