Fig. 4.

Ribbon lattice formed from repeating DNA barcode units. (a) Schematic drawing showing the concatenation of the single-unit aperiodic barcode units into a repeating pattern. Two more pairs of sticky ends were included on the ends of the tile layer (compare with Fig. 1b). The sticky ends are represented by colored pads (yellow and red). (b) An AFM image showing the ribbon lattice displaying a repeating pattern of the barcode information. Distances between stripes are as expected.