Abstract
A new method to fabricate permanent microstructures in hollow fiber-shaped substrates utilizing the flow patterns generated by the multiphase flows in microchannels was proposed. Regularly arranged cellular microstructures in capillary tubes are obtained by generating a monodisperse slug flow consisting of a curable liquid resin material to be used as the solid partitions and an insoluble fluid material to fill the cellular structures, then petrifying the flow pattern by curing the resin. Experiments were performed using a UV-imprinting resin as the structural material fluid, and a T-junction with the inner diameter of 150μm as the mixer. Fabrication of arrays of cellular microstructures in capillary tubes confining either Nitrogen gas or DI-water was successfully demonstrated.
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