Robust nucleic acid arrays and lattices are assembled based on double crossover cohesion of polygonal units whose edges composed of nucleic acid multi-crossover domains.

The form, which has become a backbone in the field of DNA nanotechnology, is called a double crossover- or DX-tile.

The form, which has become a mainstay in the field of DNA nanotechnology, is known as a double crossover- or DX-tile.