▎ 摘　　要

NOVELTY - Structure comprises: a substrate; a first graphene level overlayed on the substrate, where the first graphene level comprises one or more graphene stacks, and a first graphene stack in the first graphene level forms a first graphene based nanostructure; a first interlayer overlayed on the first graphene level; and a second graphene level overlayed on the first interlayer, where the second graphene level comprises one or more graphene stacks. A second graphene stack in the second graphene level forms a second graphene based nanostructure. USE - The structure i.e. multi-level stacked graphene structure including graphene quantum dots, graphene nanoribbons, graphene nanonetworks, graphene plasmonics and graphene super-lattices is useful: in electronic devices, super-strong composite materials, and energy generation and storage applications; and for making a multiple band gap device including multiple band gap photovoltaic device, multiple band gap photodetector and multiple band gap LED. ADVANTAGE - The structure: has good chemical, mechanical, electronic and optical properties, including carrier mobility, Young's elastic modulus and thermal conductivity; is easy to pattern and integrate with other elements or components; and provides versatile and efficient band gap device.