FIG. 1.

High throughput particle mobility measurements in microchannels. (a) Schematic of the experimental setup showing the microfluidic device, microscope objective, and the particle flow path through the microchannel. The inset shows the bright field image of the tapered entrance and the straight channel with a polystyrene bead traveling at a velocity U. The dashed vertical lines in red indicate the linear section of the microfluidic geometry. The straight channel has a height, width, and length of 25 ± 0.4, 25.3 ± 0.4, and 150 μm, respectively. (b) Scanning electron micrograph image showing the square channel cross-section. The scale bar is 25 μm.