Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 59 / Number 1 / Pages 240-249
W. Wang, T. B. Jones, D. R. Harding
Fusion Science and Technology / Volume 59 / Number 1 / Pages 240-249
Format:electronic copy (download)
The double emulsion (DE) droplets used for fabrication of cryogenic foam targets for inertial confinement fusion experiments require precisely controlled volumes. On-chip electric field actuated microfluidic assembly of DE droplets can be used to achieve such precision. The electrowetting-on-dielectric and dielectrophoresis effects make it possible to manipulate both conductive and dielectric droplets simultaneously on a substrate. Aqueous and nonaqueous liquid droplets precisely dispensed from two reservoirs on a microfluidic chip are transported and combined to form oil-in-water-in-air or water-in-oil-in-air DE droplets. The dispensing reproducibility is studied as a function of a set of operation parameters. Conditions for spontaneous emulsification for DE formation are developed in terms of droplet surface energies.
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