Fig. 4
Evaluation of the specificity of the sensing strategy. A SPR detection sensorgrams and (B) the response signals of (a) blank control and exosomes (1.0 × 107 particles/mL) derived from (b) HeLa, (c) LNcap, (d) HepG2, (e) MCF-7, and (f) SK-BR3 cell lines, respectively. All data expressed as mean ± standard variation (n = 3)