Control of flow direction in microfluidic devices with polyelectrolyte multilayers.

  title={Control of flow direction in microfluidic devices with polyelectrolyte multilayers.},
  author={Susan L R Barker and David R Ross and Michael J. Tarlov and Michael Gaitan and Laurie E. Locascio},
  journal={Analytical chemistry},
  volume={72 24},
Electroosmotic flow (EOF) is commonly utilized in microfluidics. Because the direction of the EOF can be determined by the substrate surface charge, control of the surface chemical state offers the potential, in addition to voltage control, to direct the flow in microfluidic devices. We report the use of polyelectrolyte multilayers (PEMs) to alter the surface charge and control the direction of flow in polystyrene and acrylic microfluidic devices. Relatively complex flow patterns with simple… CONTINUE READING

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