Fig. 4. Photographs (i) and SERS mapping pictures (ii) of test lines of LFA strips for different L. mono (a), C. jejuni (d), and S. aureus concentrations (g). Corresponding Raman spectra of the test lines for different L. mono (b), C. jejuni (e), and S. aureus concentrations (h). Corresponding calibration lines of L. mono (c), C. jejuni (f), and S. aureus (i).
