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. 2020 Oct 15;7(5):216–221. doi: 10.1089/3dp.2019.0166

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Copyright 2020, Mary Ann Liebert, Inc., publishers

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FIG. 4. — (a) Plot depicting the “ablation z-range” of different oxygen-permeable films. (b) Top view of four-well microfluidic chips connected by three different shaped channels (straight, sawtooth, and spiral channels). Each set of channels is fabricated at different depths separated by 200 μm. (b1–b3) Zoomed images of the microchannel focused at different depths to highlight the different shaped channels. This structure was fabricated with PDMS as fabrication window. PDMS, polydimethylsiloxane. Color images are available online.