▎ 摘　　要

NOVELTY - Forming pores in a graphene sheet, comprises: locating a graphene sheet in vacuum containing many passivation elements which are styrene or ethylene; forming at least one pore having a first diameter in the sheet via an electron-beam (e-beam) that induces many active carbon sites at edges of each nanopore, so that the passivation elements bond to the active carbons sites; and exposing the carbon sites to the passivation elements for a predetermined period of time so that passivation elements bond to active carbon sites to form covalent bonds and extend into pore to decrease initial diameter. USE - The method is useful for forming pores in a graphene sheet. ADVANTAGE - The method controls the overall diameter of the nanopore, while maintaining a high periodicity of nanopores in the graphene sheet. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for reducing the diameter of pores formed in a graphene sheet, comprising: forming at least one pore having a first diameter in the graphene sheet so that the pore is surrounded by passivated edges of the graphene sheet; chemically reacting the passivated edges with a chemical compound that comprises an organic compound comprising benzene, toluene, ethyl benzene, n-propylbenzene, n-butylbenzene, p-xylene, phenol, 4-methylphenol, phenetole, 3,5-xylenol or anisole; and forming a molecular brush at the passivated edges in response to the chemical reaction to define a second diameter that is less than the initial diameter of the pore.