Formation of monodisperse bubbles in a microfluidic flow-focusing device

Garstecki, Piotr; Gitlin, Irina; DiLuzio, Willow; Whitesides, George M.; Kumacheva, Eugenia; Stone, Howard A.
September 2004
Applied Physics Letters;9/27/2004, Vol. 85 Issue 13, p2649
Academic Journal
This letter describes a method for generating monodisperse gaseous bubbles ill a microfluidic flow-focusing device. The bubbles can be obtained in a range of diameters from 10 to 1000 μm. The volume Vb of the bubbles scales with the flow rate q and the viscosity μ of the liquid, and the pressure p of the gas stream as Vb ∝ p/qμ. This method allows simultaneous, independent control of the size of the individual bubbles and volume fraction of the dispersed phase. Under appropriate conditions, bubbles self-assemble into highly ordered, flowing lattices. Structures of these latices can be adjusted dynamically by changing the flow parameters.


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