Fig. 2: Self-assembly of 6FF.
From: Supramolecular double-stranded Archimedean spirals and concentric toroids
a Absorption spectra of supramolecular nanosheets of 6HH (50 μM in methylcyclohexane at 283 K), Archimedean spirals of 6FF (12.5 μM in dodecane at 298 K), and monomeric 6FF (12.5 μM in dodecane at 373 K). Spectra of the aggregates were measured under conditions of concentration and temperature where the degree of aggregation is close to unity. b AFM image of supramolecular nanosheets of 6HH. Scale bar = 200 nm. c–e AFM images of Archimedean spirals of 6FF. Scale bar = 200 nm (c) and 50 nm (d). The images displayed in d and e are inverted so that the spiral is shown as anticlockwise in the polar coordinate. f Plot of r against θ for the points in the polar coordinates shown in e. g ADF–STEM image of the Archimedean spiral of 6FF. Scale bar = 50 nm. Inset: cross-sectional histogram. h Schematic representation of self-assembly of 6FF to form a supramolecular double-stranded Archimedean spiral.
