Figure 2From: Hydroxyapatite Mineralization on the Calcium Chloride Blended Polyurethane Nanofiber via Biomimetic MethodSEM images of electrospun polyurethane nanofibers containing different concentration of CaCl 2 after 2 h (a) and 7 days (b) incubated in SBF solution for (1) 0, (2) 1, (3) 1.5 and (4) 2 wt%, respectively.Back to article page