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Published January 1, 2005 | public
Journal Article Open

Principles of microfluidic actuation by modulation of surface stresses


Development and optimization of multifunctional devices for fluidic manipulation of films, drops, and bubbles require detailed understanding of interfacial phenomena and microhydrodynamic flows. Systems are distinguished by a large surface to volume ratio and flow at small Reynolds, capillary, and Bond numbers are strongly influenced by boundary effects and therefore amenable to control by a variety of surface treatments and surface forces. We review the principles underlying common techniques for actuation of droplets and films on homogeneous, chemically patterned, and topologically textured surfaces by modulation of normal or shear stresses.

Additional Information

"Reprinted, with permission, from the Annual Review of Fluid Mechanics, Volume 37 copyright 2005 by Annual Reviews, www.annualreviews.org" The authors are very grateful for financial support from the National Science Foundation, Unilever Research U.S., NASA, and the U.S. Army.


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