Acoustic modulation of droplet size in a T-junction

Schmid, L. and Franke, T. (2014) Acoustic modulation of droplet size in a T-junction. Applied Physics Letters, 104(13), p. 133501. (doi:10.1063/1.4869536)

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Abstract

We introduce an approach and describe the process of acoustically driven formation of droplets in a microfluidic T-junction. Our system allows for fast and precise control of drop volume over a wide range that is fully electrically triggered. We exploit the interaction of a surface acoustic wave (SAW) excited on a piezoelectric, transparent substrate with the fluid to adjust the size of drops in a continuous microflow in real time and relate SAW intensity and drop size. Our device operates in the squeezing regime at low capillary numbers. We describe the mechanism of SAW modulated formation of a monodisperse microemulsion that forms the basis for the integration of more complex operations useful for droplet fluidic systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Franke, Professor Thomas and Schmid, Mr Lothar
Authors: Schmid, L., and Franke, T.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Applied Physics Letters
Publisher:American Institute of Physics
ISSN:0003-6951
ISSN (Online):1077-3118

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