Using an off - the - shelf camera flash, researchers turned an ordinary sheet of graphene oxide into a material that bends when exposed to moisture. (sciencedaily.com)
They then added a layer of graphene in order to apply an electric voltage with which the density of electrons in the material could be controlled. (sciencedaily.com)
But because the end product is only one atom thick, studying the properties of graphene in isolation has not been nearly as easy. (newatlas.com)