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Microfluidic chips printed in PMMA. (a) Microfluidic mixer cascade for effective mixing of dyed water (scale bar: 10 mm). (b) 2.5-dimensional microfluidic spiral (scale bar: 10 mm). (c) Enhanced mixer structure of 600 µm periodic structures, effectively mixing dyed water (scale bar: 10 mm). (d) Three-dimensional microchannel printed in PMMA around a straight channel, visualized using an aqueous fluorescent dye (scale bar: 10 mm).
