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Tas, N.R. and Berenschot, J.W. and Lammerink, T.S.J. and Elwenspoek, M.C. and van den Berg, A.
(2002)
Nanofluidic bubble pump using surface tension directed gas injection.
Analytical Chemistry, 74 (9).
pp. 2224-2227.
ISSN 0003-2700
*** ISI Impact 5,856 ***
Full text available as:
Official URL: http://dx.doi.org/10.1021/ac011117o AbstractA new concept for liquid manipulation has been developed and implemented in surface-micromachined fluid channels. It is based on the surface tension directed injection of a gas into the liquid flow through micrometer-sized holes in the microchannel wall. The injected gas is directed to an exhaust by a cross-sectional asymmetry of the microchannel and thereby moves minute liquid volumes. Successful pumping experiments were performed with single stroke volumes of tens of picoliters at frequencies around 1 Hz. The minimum actuation pressure is 0.6 bar for a 2-μm channel height, in accordance with theoretical predictions.
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