| abstract |
Graphene is formed in a substantially uniform thickness on an object having irregularities. After the object is immersed in the graphene oxide solution, it is pulled up and dried, or the object and the electrode are immersed, and a voltage is applied between the electrodes using the object as an anode. Since graphene oxide is negatively charged, it is attracted to the anode and adheres to the surface of the object with a substantially uniform thickness. Thereafter, by heating the object in a vacuum or a reducing atmosphere, graphene oxide is reduced to graphene. By the above, it is possible to form a layer of graphene having a substantially uniform thickness even on the surface of the object having irregularities. For example, a graphene layer can be formed also on the surface of a whisker-shaped silicon, and it can use also for electrical storage devices, such as a lithium ion secondary battery. |