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AFM images of (a) pristine CS membrane, (b) CS/GO-1, and (c) CS/GO-2 MMMs. (d) SEM and (e) TEM of GO and SEM images of the top surface and cross-section of (f,g) CS, (h,i) CS/GO-0.5, (j,k) CS/GO-1.5, and (l,m) CS/GO-2 membranes. Reprinted with permission from [136]. Copyright 2018 Elsevier B.V.
