Patent ID: 8900977

Claim:
A method for making an epitaxial structure, the method comprising: providing a substrate having an epitaxial growth surface; making a graphene layer on the epitaxial growth surface and forming a plurality of apertures through the graphene layer to expose a part of the epitaxial growth surface to form an exposed part, wherein the making the graphene layer and forming the plurality of apertures comprises: making a graphene suspension with graphene powder dispersed therein; forming, a continuous graphene coating on the epitaxial growth surface of the substrate; and making a patterned titanium dioxide layer, wherein the making, the patterned titanium dioxide layer comprises depositing titanium on a patterned carbon nanotube structure to obtain a patterned metal titanium layer and oxidizing the patterned metal titanium layer; contacting the patterned titanium dioxide layer with the continuous graphene coating; irradiating the patterned titanium dioxide layer with ultraviolet light; and removing the patterned titanium dioxide layer; and epitaxially growing an epitaxial layer from the exposed part of the epitaxial growth surface and through the plurality of apertures.