Figure 4 | Scientific Reports

Figure 4

From: SERS-based Immunoassay in a Microfluidic System for the Multiplexed Recognition of Interleukins from Blood Plasma: Towards Picogram Detection

Figure 4

(A) SERS spectra obtained for increasing concentration of IL-18: (a) 0.0; (b) 0.005; (c) 0.01; 0.1; (e) 0.5; (f) 1.0; (g) 2.5; (h) 5.0; (i) 10.0; (j) 30.0 ng·ml−1 in blood plasma. (B) The relationship between the intensity of the marker band at 1326 cm−1 versus the concentration of IL-18 in the range from 0 ng·ml−1 to 30 ng·ml−1.

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