fig3

Figure 3. AFM phase images of the membranes under study, (A) N212, (B) SPEEK0, (C) SPEEK40, (D) SPEEK45, (E) SPEEK50.
Figure 3. AFM phase images of the membranes under study, (A) N212, (B) SPEEK0, (C) SPEEK40, (D) SPEEK45, (E) SPEEK50.
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