Fig. 12
From: A Novel SERS Substrate Platform: Spatially Stacking Plasmonic Hotspots Films
a Raman spectra of R6G molecules with the concentration changing from 10−8 M to 10−13 M in the dual-layer porous Au films. b Magnified Raman spectra of R6G molecules with the concentration of 10−13 M in the dual-layer porous Au films. c Raman spectra of R6G molecules with the concentration changing from 10−8 M to 10−10 M in the single-layer porous Au film. d The relationships of peak intensities at 1368 cm−1 and the logarithmic concentrations of R6G. The sputtering time of each layer of porous Au films is 47 s. Laser power: 0.24 mW