Fig. 20From: Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methodsa Schematic diagram of a two-step preparation of Ca-alginate hydrogel microparticles using a microfluidic device constructed from fluoropolymer capillaries and junctions. Micrographs of b dried Na-alginate microparticles in air and c corresponding Ca-alginate microparticles after gelation in CaCl2 solution. Figure reprinted and adapted with permission from Reference [59]Back to article page