▎ 摘　　要

NOVELTY - A graphene layer is formed by mixing carbon source with a horizontally oriented molten solvent, precipitating carbon source from molten solvent to form graphite layer across the molten solvent, and separating the graphite layer into a set of graphene layers. USE - Formation of graphene layer for incorporation into a device selected from molecule sensors, LEDs, LCDs, solar panels, pressure sensors, surface acoustic wave (SAW) filters, resonators, transistors, capacitors, transparent electrodes, UV lasers, and/or DNA chips (all claimed). ADVANTAGE - The graphite film is formed to be substantially free of lattice defects. Because the material layers are formed across the surface of a molten solvent, the size and shape of the resulting graphene or hexagonal boron nitride layers can be determined by the size and shape of the horizontally oriented molten solvent. By preselecting a mold to produce a molten catalyst surface of a particular size and shape, the size and shape of the graphene or hexagonal boron nitride layers can also be predetermined. Such a predetermined size and shape is thus not merely the result of cutting a material layer to a particular shape, but rather, forming the material layer in a particular and preselected or predetermined size and shape. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) graphene layer which has a predetermined size and shape; and (2) formation of hexagonal boron nitride layer which involves mixing boron nitride source with a horizontally oriented molten solvent and precipitating the boron nitride source from the molten solvent to form a hexagonal boron nitride layer across the molten solvent.