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. Author manuscript; available in PMC: 2018 Dec 13.
Published in final edited form as: RSC Adv. 2017 Dec 13;7(88):56123–56136. doi: 10.1039/c7ra08737c

Figure 7.

Figure 7

Zeta potential due to pH change in each step of layer-by-layer functionalization. Membrane used: PVDF (Nanostone PV200), original pore size of 48 ± 1 nm. PAA weight gain ≈ 3.0%. PAH:PAA = 2/1 molar, PSS:PAA = 1/1 molar; OmpF permeated: 1.74 g/m2 of PVDF top surface. Some error bars are inside the symbols or are negligible.