▎ 摘　　要

NOVELTY - Perforating a sheet of graphene-based material involves (a) arranging the sheet of graphene-based material comprising multi-layer graphene having 2-10 graphene layers on a porous substrate, and (b) exposing the sheet of graphene-based material to particle beam comprising nanoparticles having energy of 2-500 keV/nanoparticles and opening a variety of pores extending through the multiple graphene sheets. At least two of the graphene layers are independently stacked. USE - Perforating sheet of graphene-based material (claimed) for filtration applications and separation application. Uses include but are not limited to molecular filter, barrier material, band gap material and electroconductive filler material. ADVANTAGE - The method efficiently provides perforated sheet of graphene-based material with improved pore density and pore size, size distribution and tunable electrical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for modifying the sheet of perforated graphene-based material, which involves arranging the sheet of perforated graphene-based material comprising a set (s1) of pores extending through the sheet of graphene-based material and having a pore size (p1) and exposing the sheet of perforated graphene-based material to a particle beam and modifying the sheet of perforated graphene-based material. The modification process involves creating a set (s2) of pores having a pore size (p1) extending through the multiple graphene sheets and/or modifying the pore size (p1).