Fig. 3

Fluorescence microscopy images of live and dead staining. Survival rate of HUVEC cells treated with AuNC@PEGs at different concentrations (0 μg/mL (a), 10 μg/mL (b), 20 μg/mL (c), 50 μg/mL (d), 100 μg/mL (e), 200 μg/mL (f), 500 μg/mL (g), and 1000 μg/mL (h)) for 24 h. Green fluorescence represents living cells and red fluorescence represents dead cells. The scale bars are 100 μm