3.2 Nanofiber morphology
Figures 3 and 4 present SEM micrographs and diameter frequency distribution (%) for CA and CA@A nanofiber scaffolds, respectively. Under SEM, both the pure and annatto-containing cellulose acetate nanofibers present smooth and relatively homogenous porous mats and exhibit porous interconnectivity, which is ideal for cell migration and scaffold colonization. Average fiber diameter was 284±130 nm for CA and 420±212 nm for CA@A.