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. 2016 Oct 7;2(10):e1601026. doi: 10.1126/sciadv.1601026

Fig. 3. Measured particle size–dependent filtration characteristics of CNT-STEMs with N-MWCNT intertubular distances of 25, 95, and 325 nm, using small-molecule fluorescein and fluorescent polystyrene nanospheres of 20, 50, 100, 140, 400, and 1000 nm in diameter.

Fig. 3

(A) Fluorescence microscopy images showing fluorescein solution and fluorescent polystyrene nanospheres of various diameters being filtered by the CNT-STEM. The direction of the flow is from right to left as indicated by the red arrows. Yellow lines delineate the contours of the N-MWCNT structures. Scale bars, 50 μm. (B) Penetration of fluorescein and fluorescence polystyrene nanospheres through the N-MWCNT structure (n = 8).