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Concentration of probe molecules transported through the silica nanoparticle-functionalized microsieve. Section A: diffusion (black symbols, black solid lines) and migration (red symbols, red dotted lines) of MB (circle) and RNAse (triangle). Section B: diffusion (black circle, black solid line) followed by migration after 140 h (red circle, red dotted line) of MB in a mixed solution containing both MB and RNAse.
