Controlled electrocoalescence in microfluidics

Date

2006

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Priest, C.I.
Herminghaus, S.
Seemann, R.

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Applied Physics Letters, 2006; 89(13)

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<jats:p>Electrocoalescence of aqueous droplets is investigated as a tool for microfluidic processing. Where droplets are separated by only thin lamellae, coalescence can be induced on demand within a fraction of a millisecond at low potentials (few volts). The authors show that in their approach electrocoalescence proceeds through an electric-field-induced dynamic instability of the oil/water interface. When the electrode geometry and applied potential are optimized, individual lamellae can be targeted for rupture within highly ordered droplet arrangements.</jats:p>

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