Fig. 7.
(A) Raman intensity versus concentration with R6G in Ag colloid. Each data point is the peak value at 1360 cm−1 for at least two averaged spectra. Solid line is an exponential decay line fit. (B) Raman intensity versus concentration with R6G in water with no Ag nanoparticles. Again, each data point is the peak value at 1360 cm−1.