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SEM imaging and shape descriptor distributions of Fe nanoparticles in PVDF-PAA-Fe membrane. (a) Through-Lens-Detector (TLD) Backscattered Electron Mode of hollow fiber, (b) zoom-in of (a) enhanced contrast for counting/sizing Fe nanoparticles, (c) circularity and degree of sphericity of Fe NPs in hollow fiber membranes, (d) circularity and degree of sphericity of Fe NPs in flat sheet membranes.
