Figure 4From: Surface modification of a polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane (POSS-PCU) nanocomposite polymer as a stent coating for enhanced capture of endothelial progenitor cells SEM images of POSS-PCU. Pure POSS-PCU films displayed a flake-like surface. Immobilization with anti-CD34 antibodies causes the surface to adopt a more ridge-like appearance, possibly due to protein aggregations. Scale bar represents 20 μm.Back to article page