Figure 4

DIC microscopy pictures of HUVEC with nanorods and without nanorods. A: control HUVEC with no treatment, no nanorods were observed, (B-D): HUVEC treated with EuPO₄·H₂O at different concentrations (B: 20 μg/ml, C: 50 μg/ml and D: 100 μg/ml), and (E-F): HUVEC treated with TbPO₄·H₂O nanorods at different concentrations (E: 50 μg/ml and F: 100 μg/ml). In few places, nanorods, inside the cells, were marked by white arrow sign (B-D).