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

Figure 5.

Figure 5

Visualisation of various pH dependent self-assembly by TEM analysis. TEM 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).