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Fabrication of PDMS microfluidic channels from the PEGDA generated microstructures. (a) PEGDA micromold of a microchannel fabricated on the glass substrate, colored with Rhodamine B, and (b) PDMS microfluidic channel fabricated from (a) showing the laminar flow in the microchannel, colored with green and yellow dyes. The channel width in the gradient region is 4.8 mm.
