Three-dimensional mixers with non-planar microchannels in a monolithic glass substrate using oblique powder blasting

We present three-dimensional (3D) micromixers realized in a monolithic glass substrate using a simple oblique powder-blasting microfabrication method and a single photosensitive elastomeric mask. The mixer topology consists of a curved microchannel that incorporates a series of nozzle-diffuser elements buried inside the glass substrate. The strongly varying microfluidic cross-section of these elements and multiple channel bends result in the generation of multiple vortices. This results in achieving a high mixing index by chaotic advection, as visualized by a phenolphthalein-sodium hydroxide colour reaction, for flow rates in the range of 2 to 200 μl min-1.


Published in:
Journal of Micromechanics and Microengineering, 20, 8, 085028
Year:
2010
Publisher:
Institute of Physics
ISSN:
0960-1317
Keywords:
Laboratories:




 Record created 2011-01-05, last modified 2018-03-17


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