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|Title:||Transpiration-based micropump for delivering continuous ultra-low flow rates|
|Publisher:||IOP Publishing Ltd|
|Description:||In this paper we describe the design, construction and operation of a micropump that delivers continuous, ultra-low flow velocities at ∼100 μm s−1. The pumping concept is based on the commonly observed phenomenon of transpiration in plant leaves. A liquid meniscus is pinned inside a microchannel by selective hydrophobic patterning and the evaporation rate of the liquid at the meniscus is controlled. The controlled evaporative flux results in a regulated flow of the liquid from a reservoir to the meniscus. Using this technique, precise flow control (5 nl min−1) has been achieved in several channel geometries for extended periods of time (∼2 h). Various factors affecting the performance of the pump were studied and theoretical predictions along with experimental results are presented. Such a micropump could find applications in emerging biological assays such as single-molecule studies of DNA and cell adhesion analyses.|
|Other Identifiers:||Namasivayam, Vijay; Larson, Ronald G; Burke, David T; Burns, Mark A (2003). "Transpiration-based micropump for delivering continuous ultra-low flow rates." Journal of Micromechanics and Microengineering. 13(2): 261-271. <http://hdl.handle.net/2027.42/49039>|
Journal of Micromechanics and Microengineering.
|Appears in Collections:||Chemical Engineering (ChE)|
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