@article {155856,
	title = {Microfluidic fabrication of water-in-water (w/w) jets and emulsions},
	journal = {Biomicrofluidics},
	volume = {6},
	number = {1},
	year = {2012},
	pages = {012808},
	abstract = {
	We demonstrate the generation of water-in-water ( w/w) jets and emulsions by combining droplet microfluidics and aqueous two-phase systems ( ATPS). The application of ATPS in microfluidics has been hampered by the low interfacial tension between typical aqueous phases. The low tension makes it difficult to form w/w droplets with conventional droplet microfluidic approaches. We show that by mechanically perturbing a stable w/w jet, w/w emulsions can be prepared in a controlled and reproducible fashion. We also characterize the encapsulation ability of w/w emulsions and demonstrate that their encapsulation efficiency can be significantly enhanced by inducing formation of precipitates and gels at the w/w interfaces. Our work suggests a biologically and environmentally friendly platform for droplet microfluidics and establishes the potential of w/w droplet microfluidics for encapsulation-related applications. (C) 2012 American Institute of Physics. [doi:10.1063/1.3670365]

},
	url = {https://aip.scitation.org/doi/10.1063/1.3670365},
	author = {Shum, Ho Cheung and Varnell, Jason and Weitz, David A}
}
