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. 2020 Apr 27;10(5):830. doi: 10.3390/nano10050830

Figure 4.

Figure 4

AFM images of (a) h = 100 nm (b) h = 60 nm t = 4.5 min and (d) h = 60 nm t = 9 min membranes. (c) Height distributions of the membranes in (a,b).