File Name : figure s1.tif

Caption : sers properties of the core@shell nanocomposite

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Caption : cell viability of hep g2 cells incubated with ag@au nps

File Name : fig. s5.tif

Caption : construction of dye model

File Name : fig. s6.tif

Caption : ld1 intensity curves of the cell sample and the reference

File Name : fig. s7.tif

Caption : pc1 loadings of the whole data set and six subsets

File Name : fig. s8.tif

Caption : the pc1 loadings weighted by the frequency of peak occurrence