Fig. 3From: Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methodsSchematic illustrations a “cross-flowing”, b “co-flow” and c “flow-focusing” geometries for a microfluidic device. Q and w denote respectively flow rate and channel width. Subscripts d, c, o and or denote respectively dispersed fluid, continuous fluid, outlet channel and orifice. Figure reprinted with permission from Reference [65]Back to article page