A novel microfluidic structure based on the electroosmotic guiding of reagent streams is presented that can be used as a fully adjustable diffusion based microreactor. The position and the width of two aqueous reactant streams entering a laminar-flow chamber can be controlled individually by changing the flow ratio of three parallel guiding streams containing buffer only. To control the intensity of product formation, the overlapping area between the diffusion regions of the two different reagent streams can be adjusted. This article describes the fabrication and experimental characterization of the device.
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The authors like to acknowledge the funding of this research by the “Netherlands Organization for Scientific Research” (NOW) as a part of the SPRINTLOC “vernieuwings impuls” project.
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Kohlheyer, D., Lammertink, R.G.H., Schlautmann, S. et al. Reaction and diffusion dynamics in a microfluidic format. MRS Online Proceedings Library 820, 79–84 (2004). https://doi.org/10.1557/PROC-820-O3.5