Fig. 2.

Inverse pattern barcode lattice (10010). (a) Schematic drawing of the barcode lattice representing the bit sequence 10010, which is the inverse of the first barcode of 01101. A single layer is shown (Left), and a four-layer lattice fragment is given (Right). (b) Strand structure of one barcode layer that represents barcode information of 01101. The red strand is the scaffold strand required for the tile assembly. The distance between adjacent hairpins is indicated in helical turns. (c) An AFM image at scale of 400 × 400 nm. Each layer contains five DX tiles, ≈75 nm wide, and the distance between the two stripes (designated 1) is ≈45 nm, as expected. See Fig. 9 for a large-area scan AFM image.