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Moha Shahjamali1 Vinothan Manoharan1

1, Harvard University, Cambridge, Massachusetts, United States

The fabrication of complex topologies such as a braid, which consists of three or more interlaced strands of a soft material, represents a major challenge in nanotechnology. DNA is a promising material for braid fabrication because of its high flexibility and extraordinary programmability. Using a DNA origami approach, we demonstrate that double-stranded DNA braids can be created through self-assembly of three or more single strands of DNA and a number of staple strands that form the crossing points (nodes) of the braid. We show that successful braid formation requires the distance between nodes to be an odd number of half-turns (5 basepairs in B-DNA), which minimizes torsional stress. We also investigate the metallization of the DNA origami braid template to create "nano-Litz" wire, which has low electrical resistance at high frequencies. Such constructs could potentially be used as electrical interconnects at up to gigahertz frequencies.

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