Figure 3: AFM confirmation of the DNA nanoarchitectures.
From: Interlocked DNA nanostructures controlled by a reversible logic circuit
(a) AFM image of [3]pseudocatenane at pH 8, with two clearly observed heads. (b) AFM image of [3]catenane with ROs at pH 8 in irregular shapes, implying the mobility of circles. (c) AFM images of [3]catenane with ROs at pH 5, demonstrating that two heads are linked together. It originates from the formation of bimolecular i-motif structure on the heads. The scale bars represent 50 nm. The whole images corresponding to (a–c) are provided as Supplementary Figs 2–4.
