Figure 3From: Label-free NIR-SERS discrimination and detection of foodborne bacteria by in situ synthesis of Ag colloidsAveraged SERS spectra of a P. aeruginosa and b two species of Listeria (L. monocytogenes and L. innocua). c Normalized intensity ratio of significant peaks from two Listeria spp. to the band at 1,040 cm−1.Back to article page