Fig. 16From: Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methodsa Schematic diagram of a glass-based microfluidic device for the preparation of Ca-alginate hydrogel microparticles, with channels modified so as to be hydrophobic. b Micrographs of hydrogel microparticles obtained with different mass fractions of the aqueous CaCl2 solution in emulsion (W). Figure reprinted with permission from Reference [29]Back to article page