Osmosis and pervaporation in polyimide submicron microfluidic channel structures

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Eijkel, Jan C.T. and Bomer, Johan G. and Berg van den, Albert (2005) Osmosis and pervaporation in polyimide submicron microfluidic channel structures. Applied Physics Letters, 87 (11). p. 114103. ISSN 0003-6951

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Abstract:Osmosis and pervaporation of water through the roof of all-polyimide channels of 500 nm height is described. The phenomena cause both a liquid flow in the channels and a concentration change of dissolved salt. Both effects are amplified due to the thin channel roof and the small channel height. Osmotic movement of demineralized water was observed towards a salt solution and towards ethanol and isopropanol. Water movement by pervaporation was observed from a salt solution towards the atmosphere. Flow velocities of up to 70 µm/s were generated in the channels. The results are in accordance with predictions from the solution-diffusion model for membrane transport. The observed phenomena can be applied in a nanofluidic osmotic pump or for an osmotic or pervaporative concentrator.
Item Type:Article
Copyright:© 2005 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/52858
Official URL:http://dx.doi.org/10.1063/1.2046727
Publisher URL:http://link.aip.org/link/?APPLAB/87/114103/1
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