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A microfluidic approach is developed for the synthesis of anisotropic particles based on the flow of two immiscible organic phases, a polymerizable phase and a non-polymerizable phase, in a co-flowing aqueous stream within a microchannel. The anisotropic shape originates from the balancing of the interfacial energies between the three phases. The anisotropic particles shown in the figure are obtained by the photopolymerization of the droplets formed in the channels.
Nisisako et al. (2007) studied this question.