Fig. 7
Images of leukocyte passing through the filter gap. a, b Images captured during a sample flow speed of 6 μL/min (Exposure time: 100 ms). Leukocytes were stained with Hoechst 33342 (blue). In case of an uncaptured cell, leukocytes enter the microfilters, pass through the filter gap without being captured, and finally reached to the waste area. Scale bar: 20 µm. c Illustration of a leukocyte passing through the filter gap