▎ 摘　　要

NOVELTY - Producing graphene nanoribbons comprises: heating closed carbon nanostructures at 400-700 degrees C sufficient to induce oxidation but not thermal decomposition of the nanostructures and produce partially etched closed carbon nanostructures; dispersing the partially etched closed carbon nanostructures in an organic solvent; mechanically agitating (2) the partially etched closed carbon nanostructures in the organic solvent under conditions thus the partially etched closed carbon nanostructures open to form graphene nanoribbons; and recovering the graphene nanoribbons from the organic solvent. USE - The method is useful for producing graphene nanoribbons which are useful to form graphene nanoribbon device (claimed). ADVANTAGE - The method provides the graphene nanoribbons: having narrow widths and atomically smooth edges exhibiting band gaps for room temperature transistor operations with excellent switching speed and high carrier mobility (potentially even ballistic transport); in high yields (80%) that enable facile fabrication of graphene nanoribbon devices (exhibiting phase coherent electron transport at low temperature), making these materials easily accessible for a wide range of fundamental and practical applications; which exhibits ultra-high quality with atomically smooth edges for narrow graphene nanoribbons, low ratios of disorder (D) to graphitic (G) Raman bands and high electrical conductivity; which exhibits metallic behavior with little disorder effect and low resistivity; and which provides high yield and efficiency in many laboratories without highly specialized and expensive equipment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene nanoribbon having a discrete number of layers (108, 110) of 1-4, a width of 10-30 nm and having surface integrity sufficient to yield a Raman Peak ratio (disorder (D) to graphitic (G) Raman bands (ID/IG)) of less than 0.5. DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of unzipping the multi-walled carbon nanotubes to form graphene nanoribbons. Bond disruption (1) Agitation (2) disrupted area (104) inner layers (106) Layers (108, 110)