Figure 4: Merged confocal fluorescent (green) and scattering (red) images of prostate cancer C4-2B (A) and stromal HS-5 (C) cells: green the fluorescence of Alexa Fluor 488 conjugated to PSMA antibody, red the gold NP clusters; (B, D) corresponding profiles of pixel image amplitudes. Dashed lines show the boundaries of cells.