Fig. 7: Performance of SERS sensor.

a Schematic of MMP detection using SERS and ELISAs. b Concordance between concentrations of MMP measured by SERS and ELISAs for MMP-1, MMP-2, MMP-3, MMP-7 and MMP-9. c Scatter plots of the detection deviation for SERS and ELISA tests. The orange line represents the mean value.