Figure 7: Multiplex SERS spectra of four RM: (A) Schema of star-shaped GNP, coated with NIR dyes and stabilised with BSA. (B) SERS spectra of four different NIR dyes used in this multiplex assay. (C) Quantification of SERS intensities of four nanoprobes used in multiplex SERS assay; blue: IR-780, red: IR-792, green: IR-797, purple, IR-813[24].