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. Author manuscript; available in PMC: 2018 Dec 19.
Published in final edited form as: Anal Chem. 2017 Nov 27;89(24):13074–13081. doi: 10.1021/acs.analchem.7b04246

Figure 1.

Figure 1

(a) A diagram of the SPR-SERS instrument is shown. (b) The experimental SPR curve (solid) obtained from SPR-SERS instrument is compared to theoretical values (dashed). At the air/gold (50nm thickness)/sapphire prism interface (blue), both experiment and calculation show an SPR angle of 36.4°. At the PBS/gold/prism interface (red), the theoretical SPR angle is 55.1° (red dotted line) and experimental SPR angle is 55.4° (red solid line).