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Issue 12, 2006
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Electroosmotic flow patterning using microfluidic delay loops

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Abstract

A theoretical and experimental investigation of alternating electroosmotic flow patterns by means of specially designed delay loops is presented. Using elementary methods of compact network modeling and detailed FEM simulations the flow behavior and, in particular, the rearrangement of sample plugs is modeled. The proposed designs rely on flow splitting in combination with electroosmotic delay loops leading to a runtime difference or phase shift between two sub-streams. Due to this phase shift, a new fluid interface is generated at the merging point. The approach is experimentally validated by injection of a Rhodamine 6G solution into an aqueous sodium tetraborate buffer.

Graphical abstract: Electroosmotic flow patterning using microfluidic delay loops

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Publication details

The article was received on 03 Jul 2006, accepted on 04 Sep 2006 and first published on 20 Sep 2006


Article type: Paper
DOI: 10.1039/B609423F
Lab Chip, 2006,6, 1525-1529

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    Electroosmotic flow patterning using microfluidic delay loops

    F. Schönfeld, S. Hardt, M. Böhm, R. J. Püschl, M. Walder and B. Wenclawiak, Lab Chip, 2006, 6, 1525
    DOI: 10.1039/B609423F

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