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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Microfluid Nanofluidics. 2013 Mar 30;15(5):10.1007/s10404-013-1176-y. doi: 10.1007/s10404-013-1176-y

Fig. 6.

Fig. 6

Size dependence of particle trapping. (a) Fluorescent image illustrating no trapping at input Re = 54 for 20 μm diameter particles. (b) Trapping of 20 μm diameter particles at Re = 70. (c) Trapping of 20 μm diameter particles at Re = 160. (d) Superimposed images illustrating trapping of 20 μm diameter particles (blue) and free passage of 15 μm diameter particles (yellow) at Re = 69. The population ratio of the mixture is 1:1000. (c) Characterization of size-dependent trapping by flow threshold Re (Reth) as a function of particle diameter. The curves represent the calculated Reth for differently-sized particles. In all experiments, particle concentration of 56,800/mL in 100 μm high channels was used; chamber size in panels (a)–(d) was 300μm×300μm.