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Single-stranded DNA tiles and single-stranded DNA bricks. (a) Rectangular 2D molecular canvas assembled by single-stranded DNA tiles. Reproduced from [42]. (b) Drawing the desired shape on the 2D molecular canvas. Reproduced from [42]. (c) LEGO model analogue of single-stranded DNA. Reproduced from [7]. (d) “Carving” the 3D canvas into any shape. Reproduced from [7].
