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The splitting event might occur at the end of W-CNF (a,c,d,f), as well as along the contour (b,e). The arrows point towards regions of interest. The images are obtained by (a–c) AFM and (d–f) Cryo-SEM. The scale bar in a and the colour bar in c apply to all AFM images (a–c). The scale bar in d applies to all Cryo-SEM images (d–f).
