▎ 摘　　要

NOVELTY - Antibacterial and antiviral graphene nanosheet having edges with special-shaped structures, less than 100 nm lateral dimension and less than 10 nm thickness, is claimed. USE - The graphene nanosheet is useful in organic base material, inorganic base material or antibacterial antiviral metal base material for treating Candida , mold, Staphylococcus aureus, Escherichia coli, Streptococcus, Pseudomonas and influenza virus, coronavirus, hepatitis virus, enterovirus, SARS virus and HIV virus (all claimed). ADVANTAGE - The graphene nanosheet: has antibacterial rate of greater than or equal to 90%, and antivirus rate of greater than or equal to 95%, bacteriostatic rate of greater than or equal to 95% for Candida , bacteriostatic rate of 99% for Escherichia coli , and the bacteriostatic rate of greater than or equal to 97% for Staphylococcus aureus, and antiviral activity rate against the influenza virus is greater than or equal to 95%. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) antibacterial and antiviral treatment of the antibacterial and antiviral graphene nanosheets comprising blending modification, grafting modification or coating modification; and (2) preparing antibacterial and antiviral graphene nanosheets comprising photolithography, metal nanoparticle shearing, scanning probe etching, electron beam etching, plasma etching method and electron beam induced tearing method.