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Field-Effect Flow Control for Microfabricated Fluidic Networks

Richard B. M. Schasfoort, Stefan Schlautmann, Jan Hendrikse and Albert van den Berg
Science
New Series, Vol. 286, No. 5441 (Oct. 29, 1999), pp. 942-945
Stable URL: http://www.jstor.org/stable/2899493
Page Count: 4
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Field-Effect Flow Control for Microfabricated Fluidic Networks
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Abstract

The magnitude and direction of the electro-osmotic flow (EOF) inside a microfabricated fluid channel can be controlled by a perpendicular electric field of 1.5 megavolts per centimeter generated by a voltage of only 50 volts. A microdevice called a "flowFET," with functionality comparable to that of a field-effect transistor (FET) in microelectronics, has been realized. Two flowFETs integrated with a channel junction have been used to generate opposite flows inside a single EOF-pumped channel, thus illustrating the potential of the flowFET as a controlling and switching element in microfluidic networks.

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