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The flow in a staggered herringbone mixer can be used to break the boundary layers near the sensor surface. (a) Schematic illustration of a staggered herringbone mixer. The insets show the flow patterns generated by the herringbone. (b) Fluorescence microscopy images of the mixing between two fluid streams. Reproduced with permission from Stroock et al., Science 295, 647–651 (2002). Copyright 2002 AAAS.
