| abstract |
Graphene is formed to a substantially uniform thickness on an object having irregularities. In the graphene oxide solution, an object is immersed and then pulled up and dried, or an object and an 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 attached to the surface of the object in a substantially uniform thickness. After that, the graphene oxide is reduced to graphene by heating the object in a vacuum or in a reducing atmosphere. By the above, the layer of the graphene of a substantially uniform thickness can also be formed also on the surface of the uneven object. For example, a layer of graphene can be formed on the whisker-like silicon surface, and can also be used for power storage devices such as lithium ion secondary batteries. |