Gears and mechanical transmissions are at home in the Emilia-Romagna region, the Motor Valley of northern Italy. A team of researchers from the University of Bologna and the Institute for Organic Synthesis and Photoreactivity of the National Research Council (Cnr-Isof) in Bologna, led by Massimo Baroncini and Alberto Credi, has planned, constructed and operated NanoGear, a device consisting of interlocked molecular components and designed to function as a gear. Since molecules are nanometric objects (1 nanometer = 1 millionth of a millimeter), it is an exceedingly small device: Certainly, the tiniest gear ever produced in the Italian land of motors.
Click here for original story, Mechanics of the infinitely small: NanoGear, towards a molecular gear
Source: Phys.org