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Optical images of laser-printed wire membranes for organ-on-a-chip application, where (a) is printed in the non-fully cured photoresist; (b) is a successfully printed structure in the closed microfluidic channel 100/500 µm with optimally cured photoresist and (c) is a 3D laser lithography (3DLL)-made wire membrane over a 1 cm long microfluidic channel.
