To make the wire, a team from the University of Central Florida basically wrapped a regular, conducting copper wire in a supercapacitor. The wrapping stores electricity while the wire core conducts it. The supercapacitor wrapping contains two layers of nano-fibers that stick straight out from the surface of the wire, like bristles on a brush. The fibers increase the surface area of the wire by 100 times, which is important for energy storage, Drexel University nanotechnology researcher Yury Gogotsi, who was not involved in the research, wrote in a comment in the journal Nature.