Paul W. K. Rothemund is a well known figure in synthetic biology and DNA nanotechnology for his pioneering work on DNA origami.
Origami is a traditional Japanese art of folding sheets of paper in a systematic manner to build beautiful structures. In DNA origami, the self-assembling nature of DNA is used to build 2D or 3D structures. DNA origami has potential applications in drug delivery systems, and as switches in DNA computation.
Here is a TED talk by Rothemund where he takes us through DNA folding.