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field-effect flow control in polymer microchannel networksA new Bio-MEMS electroosmotic flow (EOF) modulator for plastic microchannel networks has been developed. The EOF modulator uses field-effect flow control (FEFC) to adjust the zeta potential at the Parylene C microchannel wall. By setting a differential EOF pumping rate in two of the three microchannels at a T-intersection with EOF modulators, the induced pressure at the intersection generated pumping in the third, field-free microchannel. The EOF modulators are able to change the magnitude and direction of the pressure pumping by inducing either a negative or positive pressure at the intersection. The flow velocity is tracked by neutralized fluorescent microbeads in the microchannels. The proof-of-concept of the EOF modulator described here may be applied to complex plastic ,microchannel networks where individual microchannel flow rates are addressable by localized induced-pressure pumping.
Document ID
20040012934
Document Type
Preprint (Draft being sent to journal)
Authors
Sniadecki, Nathan
(Maryland Univ. College Park, MD, United States)
Lee, Cheng S.
(Maryland Univ. College Park, MD, United States)
Beamesderfer, Mike
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
DeVoe, Don L.
(Maryland Univ. College Park, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Electronics and Electrical Engineering
Meeting Information
IEEE Transducers ''03(Boston, MA)
Distribution Limits
Public
Copyright
Public Use Permitted.
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