"(a) Single-wall carbon nanotubes labeled with ""red"" and ""blue"" DNA sequences attach to anti-red and anti-blue strands on a DNA origami, resulting in a self assembled electronic switch. (b) An atomic force microscopey image of one such structure. The blue nanotube appear brighter because it is on top of the origami; the red nanotube sits below. Scale bar is 50 nm. (c) A diagrammatic view of the structure shown in b. The gray rectangle is the DNA origami. A self-assembled DNA ribbon attached to the origami improves structural stability and ease of handling. [Credit: Paul W. K. Rothemund, Hareem Maune, and Si-ping Han/Caltech/Nature Nanotechnology]"
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