Graphene-based all-carbon logic circuit and preparation method thereof

The invention provides a graphene-based all-carbon logic circuit and a preparation method thereof, the graphene-based all-carbon logic circuit comprises two semiconductor graphene-quasi-suspended graphene field-effect transistors, the two field-effect transistors are connected in a form of sharing one source electrode, and each field-effect transistor comprises a substrate; the dielectric layer is arranged on the substrate, and a semiconductor graphene channel is formed between the dielectric layer and the substrate; the grid electrode is arranged on the dielectric layer, and under the condition that the voltage difference between the source electrode and the grid electrode meets the threshold voltage, the current in the semiconductor graphene channel is reduced, so that the field effect transistor is in an off state; the two quasi-suspended graphene electrodes are arranged on the substrate and located on the two sides of the semiconductor graphene channel respectively, and the quasi-suspended graphene electr