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. Author manuscript; available in PMC: 2013 Aug 7.
Published in final edited form as: Lab Chip. 2012 May 29;12(15):2736–2742. doi: 10.1039/c2lc21123h

Fig. 1.

Fig. 1

Layout of PDMS microfluidic device fabricated by conventional soft lithography. The upper and lower inlets provide sheath (or guiding) flows that hydrodynamically focus the droplet stream to the center of the channel, while the middle inlet delivers the droplet flow.