Extraction and collection of hydrogel microparticles. (a) Typical time-lapse images (top view) showing migration of hydrogel microparticles from carrier oil emulsion into aqueous extracting solution. (b) Typical time-lapse images (top view) of hydrogel microparticles exiting from the bifurcated outlet. (c) A typical image of the hydrogel microparticles collected in the aqueous solution from on-chip extraction. (d) A typical image of the hydrogel microparticles obtained by off-chip approach showing aggregation. The flow rates of alginate solution, carrier oil emulsion, and aqueous extracting solution are 0.1, 5.5, and 5.5 ml/h, respectively. The scale bar in (a) and (c) also applies to (b) and (d), respectively. (Multimedia view) [URL:
http://dx.doi.org/10.1063/1.4898040.2]
Download video file (233.7KB, mov) DOI: 10.1063/1.4898040.2 [URL:
http://dx.doi.org/10.1063/1.4898040.3]
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