![]() Umbanhowar P, Prasad V, Weitz D (2000) Monodisperse emulsion generation via drop break off in a coflowing stream. Thorsen T, Roberts RW, Arnold FH, Quake SR (2001) Dynamic pattern formation in a vesicle-generating microfluidic device. ![]() Teh SY, Lin R, Hung LH, Lee AP (2008) Droplet microfluidics. Saeki D, Sugiura S, Kanamori T, Sato S, Ichikawa S (2010) Microfluidic preparation of water-in-oil-in-water emulsions with an ultra-thin oil phase layer. Okushima S, Nisisako T, Torii T, Higuchi T (2004) Controlled production of monodisperse double emulsions by two-step droplet breakup in microfluidic devices. Nisisako T, Okushima S, Torii T (2005) Controlled formulation of monodisperse double emulsions in a multiple-phase microfluidic system. Nisisako T (2008) Microstructured devices for preparing controlled multiple emulsions. Luo G, Du L, Wang Y, Lu Y, Xu J (2011) Controllable preparation of particles with microfluidics. Lorenceau E, Utada AS, Link DR, Cristobal G, Joanicot M, Weitz DA (2005) Generation of polymerosomes from double-emulsions. Adv Mater 26(14):2205–2218ĭeng NN, Meng ZJ, Xie R, Ju XJ, Mou CL, Wang W, Chu LY (2011) Simple and cheap microfluidic devices for the preparation of monodisperse emulsions. Chem Eng Sci 59(15):3045–3058ĭatta SS, Abbaspourrad A, Amstad E, Fan J, Kim SH, Romanowsky M, Shum HC, Sun B, Utada AS, Windbergs M (2014) Double emulsion templated solid microcapsules: mechanics and controlled release. Angew Chem Int Ed 119(47):9128–9132Ĭramer C, Fischer P, Windhab EJ (2004) Drop formation in a co-flowing ambient fluid. J Phys D Appl Phys 40(19):R319–R336Ĭhu LY, Utada AS, Shah RK, Kim JW, Weitz DA (2007) Controllable monodisperse multiple emulsions. J Micromech Microeng 18(6):065,018Ĭhristopher GF, Anna SL (2007) Microfluidic methods for generating continuous droplet streams. Antioxid Redox Signal 20(15):2372–2415Ĭhang FC, Su YC (2008) Controlled double emulsification utilizing 3D PDMS microchannels. Langmuir 22(12):5230–5232īatinic-Haberle I, Tovmasyan A, Roberts ER, Vujaskovic Z, Leong KW, Spasojevic I (2014) Sod therapeutics: latest insights into their structure-activity relationships and impact on the cellular redox-based signaling pathways. Appl Phys Lett 82(3):364–366īarbier V, Tatoulian M, Li H, Arefi-Khonsari F, Ajdari A, Tabeling P (2006) Stable modification of PDMS surface properties by plasma polymerization: application to the formation of double emulsions in microfluidic systems. Soft Matter 8:10,719–10,724Īnna SL, Bontoux N, Stone HA (2003) Formation of dispersions using “flow focusing” in microchannels. Small 5(18):2030–2032Īdams LLA, Kodger TE, Kim SH, Shum HC, Franke T, Weitz DA (2012) Single step emulsification for the generation of multi-component double emulsions. Lab Chip 11(2):253–258Ībate AR, Weitz DA (2009) High-order multiple emulsions formed in poly(dimethylsiloxane) microfluidics. Lab Chip 10(14):1774–1776Ībate AR, Thiele J, Weitz DA (2011) One-step formation of multiple emulsions in microfluidics. ![]() Ībate AR, Thiele J, Weinhart M, Weitz DA (2010) Patterning microfluidic device wettability using flow confinement. Due to the simplicity of this method and the flexibility in controlling the properties of the double emulsions, this method shows great potential in the relevant applications. Scaling relationships for the number of cores and the size of the compound droplets are proposed. The sizes of the core and the shell droplets and the volume fraction in the compound droplets are controlled by adjusting the corresponding flow rates. ![]() The breakup processes of the core droplets and the compound droplets are analyzed. Since the droplets flow directly from the first step to the second step in the tubing without any disturbance, problems such as droplet coalescence, breakup, leakage and contamination can be avoided automatically. The formation process consists of two steps: (1) the formation of water-in-oil droplets at a co-flowing structure formed by a syringe needle and a flexible microtubing, and (2) the formation of water-in-oil-in-water compound droplets at the tip of the microtubing by buoyancy. ![]() A simple, low-cost and reliable method for the formation of double emulsions is proposed and demonstrated experimentally. ![]()
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