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Field-Effect Flow Control for Microfabricated Fluidic Networks

Science  29 Oct 1999:
Vol. 286, Issue 5441, pp. 942-945
DOI: 10.1126/science.286.5441.942

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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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