Follow the light

University of Florida chemists have developed a nanomotor that converts sunlight into motion directly, mimicking on a much smaller scale the tracking of the sun by a sunflower. The device isn't the first photochemical nanomotor, but it is the first to be built from a single piece of DNA. "It is easy to assemble, has fewer parts and theoretically should be more efficient," explains first author on the researcher's Nano Letters paper, Huaizhi Kang. It might be possible to build arrays of these devices that would be synchronized and so exert a great concerted force for possible technological applications.