In the latest phase of the nanotechnology revolution, scientists have built a collection of minuscule objects from DNA, including toothed gears, curved tubes, and a wireframe beach ball five millionths of a centimetre in diameter.
As well as being able to hold vast amounts of information, DNA is tough and flexible, making it an attractive candidate for use as a nanomaterial. Advances in molecular biology in recent decades have meant that scientists are well equipped to work with DNA and program it to do whatever they want.
"The main advantage of DNA is that we understand it," said Hendrik Dietz, now head of the Laboratory for Biomolecular Nanotechnology at München Technical University in Germany. "DNA is the only material that we can program at the nanoscale."
The building blocks of DNA can be made to assemble themselves, piece by piece, into a structure designed by the researcher.
