Fig. 3

SEM images at 25,000x of (a) untreated nylon membranes, (b) perfluorohexane plasma treatment of nylon membranes, (c) untreated PES membranes and (d) perfluorohexane plasma treated PES membranes
SEM images at 25,000x of (a) untreated nylon membranes, (b) perfluorohexane plasma treatment of nylon membranes, (c) untreated PES membranes and (d) perfluorohexane plasma treated PES membranes