同©大 Technical parameters Tongji University Material Mean pore Cut-off Open Dimension size porosity 800nm 600nm 400nm a-Al2O3 200nm 100nm 70 nm 800nm TiO2 250nm 100nm ZrO2 110nm Table 1 Rmin for proteins of different mass Protein M(kDa) 5 10 20 50 100 200 500 Rmin (nm) 1.1 1.42 1.78 2.4 3.05 3.84 5.21 d=V/3=1.18/c/3Tongji University