Patent ID: 8124751

Claim:
A system for forming a structure comprising hybridized nucleic acid monomers comprising: a nucleic acid initiator comprising a first region, a second region and a third region; a first nucleic acid hairpin monomer comprising: a first region comprising a sticky end, wherein the sticky end is located at an end of the monomer and is capable of hybridizing to the first region of the initiator; a second region adjacent to the first region, wherein the second region is capable of hybridizing to the second region of the initiator; a third region adjacent to the second region, wherein the third region is capable of hybridizing to the third region of the initiator; a fourth region that is hybridized to the third region of the first monomer when the initiator is not hybridized to the first monomer; and a fifth region that is hybridized to the second region of the first monomer when the initiator is not hybridized to the first monomer; and a second hairpin monomer comprising: a first region comprising a sticky end located at an end of the monomer, wherein the sticky end is capable of hybridizing to the fourth region of the first monomer.