Fig. 3.

(A) Molecular structures of the cationic AuNPs and the fluorescent polymer (PPECO₂). (B) Displacement of quenched PPECO₂ by cell with concomitant restoration of fluorescence. (C) Fluorescence change for 4 different cancer cell lines using AuNP-PPECO₂ conjugates. (D) Canonical score plot for the two factors of simplified fluorescence response patterns obtained with AuNP-PPECO₂ conjugates arrays against different mammalian cell types. The canonical scores were calculated by LDA (linear discriminant analysis). for the identification of 4 cell lines. Reprinted with permission from Ref. 51(a).