Figure 4

TiO ₂ nanotubes for controlled cell growth. (A) SEM images of vertically-aligned TiO₂ nanotubes with diameters of 15 nm and 100 nm. Scale bars are 200 nm. (B) Immunofluorescence images of αVβ3-integrins (red) and nuclei (blue) in HSCs cultured on TiO₂ nanotubes. Scale bars are 200 μm. (C) SEM images of filopodia formation in HSCs on TiO₂ nanotubes. Scale bars are 3 μm (reproduced from ref. 46 with permission, © Willey-VCH).