Thomlex

Paul Rothemund of Caltech can weave any two-dimensional shape or pattern using DNA molecules. This technology, which he calls "DNA origami" could one day be used to construct tiny chemical factories or molecular electronics by attaching proteins and inorganic components to DNA circuit boards.

All of Rothemund's creations are made with a single, long DNA strand. First, the strand is folded back and forth into some desired shape or pattern. The entire structure is then fastened together at strategic points with hundreds of short DNA "staples." (link from nutmeg)