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Core-shell structure microparticles prepared by phase separation and phase interface effect-based microfluidics. (a) Phase separation process of the polyethylene glycol diacrylate (PEGDA) core-shell microparticles; (b) Hollow SiO2 microspheres from interfacial reaction; (c) Interface self-assembly induced hollow structured microcapsules. Reproduced with permission from [56,58,59].
