Scientists have used nanotechnology to design what can be described as the world’s smallest electric car—just one carefully designed molecule in size. The molecule’s base has four branches that act as crude wheels which rotate when a small electrical current is applied. Given ten bursts of the current, the small car was able to move six billionths of a meter. While laboratory conditions were strict—minus 227 degrees Celsius and in a high vacuum—the achievement is an important advance for nanotechnology.
What’s the Big Idea?
The nano-car is an experiment in ‘bottom-up’ nanotechnology which, opposed to ‘top-down’ engineering, begins with a single molecule much the way biological systems function. Chemist Tibor Kudernac, lead author of the research, says muscle fibers, for example, similarly depend on the coordinated action of their smallest constituent parts. “This is a simple demonstration that we can achieve [something] like that.” While coordinated nanomachines are still a long way off, the new achievement will encourage research.
Eyes with lower pigment (blue or grey eyes) don’t need to absorb as much light as brown or dark eyes before this information reaches the retinal cells. This might provide light-eyed people with some resilience to SAD.