Fig. 3From: Insights into the angiogenic effects of nanomaterials: mechanisms involved and potential applicationsReprinted with permission from [95] Copyright 2014 SpringerHuman aortic endothelial cells on the porous silicon substrates. A Morphological characterization of macroporous (a) and nanoporous (b) silicon substrates. B SEM characterization of endothelial cells on macroporous silicon. C SEM characterization of endothelial cells on nanoporous silicon.Back to article page