Fig. 3From: Calcium-Ion-Triggered Co-assembly of Peptide and Polysaccharide into a Hybrid Hydrogel for Drug DeliveryPhotos of the (a) Fmoc-FF–alginate solution and (b) Fmoc-FF–alginate hydrogel beads. (c– g) SEM images of Fmoc-FF–alginate hydrogel beads formed in the presence of Ca2+ ionsBack to article page