Piecewise uniform conduction-like flow channels and method therefor
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United States of America Patent
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Feb 28, 2006
Grant Date -
Dec 18, 2003
app pub date -
Jun 6, 2003
filing date -
Jun 10, 2002
priority date (Note) -
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Abstract
A low-dispersion methodology for designing microfabricated conduction channels for on-chip electrokinetic-based systems is presented. The technique relies on trigonometric relations that apply for ideal electrokinetic flows, allowing faceted channels to be designed on chips using common drafting software and a hand calculator. Flows are rotated and stretched along the abrupt interface between adjacent regions with differing permeability. Regions bounded by interfaces form flow 'prisms' that can be combined with other designed prisms to obtain a wide range of turning angles and expansion ratios while minimizing dispersion. Designs are demonstrated using two-dimensional numerical solutions of the Laplace equation.
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