Figure 9: Silver staining of fibroblast (no HER2/neu expression) and BT-474 cells following 60 min pre-treatment with pegylated (GNR-PEG) or conjugated through protocol 1 (GNR-PEG-HER2) GNR which were incubated with heparinized mouse blood for four hours. BT 474 shows silver enhancement for GNR-PEG-HER2 conjugates in both conditions: before and after incubation of GNR-conjugates with blood.