Figure 2From: Nanoscale surface modifications to control capillary flow characteristics in PMMA microfluidic devicesSEM images of a microfluidic channel with 300 μm pillars. (a) Closure image of 300 μm pillars; (b) arrays of 300 μm pillars; (c) 300 μm pillars in the regions just after the inlet; and (d) 300 μm pillars in the region just before the outlet.Back to article page