Fig. 7. Confocal laser scanning images of cytoskeletal actin (red) and nuclei staining DAPI (blue) after 24 hours of incubation of 3T3 fibroblasts (A–D), HeLa cells (E–H), and MG63 osteoblasts (I–L) on glass (A, E, I), ZnO-Nrd coated glass (B, F, J), PDMS (C, G, K) and ZnO-Nrd coated PDMS (D, H, L) showing that cells do not assemble stress fibers on nanorods. The cell spreading area is greatly reduced and stress fibers are not visible in cells cultured on the nanorods. A representative result of three independent experiments is shown. Scale bars: 25 μm.