Fig. 5: Intermediate structures during transformation for 2-state nanorings.
From: DNA T-shaped crossover tiles for 2D tessellation and nanoring reconfiguration
a Schematics of nanoring transformation induced by strand displacement reactions. From state 1 to state 2, two of invader strands and two of setting strands were added, and vice versa. Invader and setting strands are marked with different colors and toehold regions are marked with pink. b The schematics and AFM images of two nanoring transformations, transformed intermediates and products. Here, the C-tile-based nanoring is used as an example (N = 8), and the N is retained after transformation. The typical assemblies are cropped out from the corresponding AFM images in this figure. The reconfiguration directions are indicated by the arrows. Green arrow shows the transformation from state 1 to state 2 and orange represents the reverse direction. c Schematics and AFM images showing the transformation of a big nanoring to a small nanoring with a decrease in N value (from N = 8 to N = 5). Samples at different time points are tracked by AFM imaging after adding invader strands, including 1 min, 5 min, 30 min, and 120 min.
