Fig. 8

A quantitative liquid-state SERS platform. a Multiphase analysis of MG dissolved in the W phase and R6G dissolved in the O phase. b Detailed spectral variations of the 1354 cm⁻¹ band assigned to R6G and the 1393 cm⁻¹ band assigned to MG in multiphase analysis. c The linear relationships between the R6G/MG molar ratios and the r values of MG (red) and R6G (blue), respectively. d Multiplex analysis of R6G and CV simultaneously dissolved in the O phase. e Detailed spectral variations of the 1506 cm⁻¹ band assigned to RG and the 1612 cm⁻¹ band assigned to CV in multiplex analysis. f The linear relationships between the R6G/CV molar ratios and the r values of CV (red) and R6G (blue), respectively. Total number of molecules in each experiment was 0.1 nmol, and the molar ratio was labeled on each spectrum. The error bars represent the statistical RSD and were calculated from triplicate SERS experiments