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. 2018 Jul 25;8:11220. doi: 10.1038/s41598-018-29152-9

Figure 6.

Figure 6

SEM microscopy employed to visualise helical pH dependent self-assembly. SEM micrographs of the helical supramolecular microstructures of NDI-L-Glu (1) produced by solvent evaporation at pH (A) 3.0 (left handed twisted ribbons), (B) 7.0 (a mixture of left and right handed twisted ribbons), and (C) 9.0 (right handed twisted ribbons).