▎ 摘　　要

NOVELTY - Barrier article comprises a substrate and a continuous graphene-based layer adhered to the surface of the substrate, where the continuous graphene-based layer is substantially impermeable to transmission of a small molecule through the graphene-based layer. USE - The barrier article and methods are useful for rendering substrate impermeable to small molecules; sealing openings on substrate; containing small molecules on one side of barrier article; and for containing environmental toxicants on one side of barrier article (all claimed). The barrier article can also be used in home or building construction industry; in packaging or shipping industries; in food packaging industry; and in drug or pharmaceutical packaging industry. ADVANTAGE - The barrier performance of polymers and other substrates are improved. Environmental containment barriers to toxicant transport; and barriers to toxicant or other small molecule transports that are wearable by an individual are provided. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method of making barrier article involving contacting a liquid solution of graphene-based sheets to a substrate, and drying the liquid solution to produce a continuous graphene-based layer adhered to the surface of the substrate, where the continuous graphene-based layer is substantially impermeable to transmission of small molecules through the graphene-based layer; (2) a method of rendering a substrate impermeable to small molecules involving contacting a liquid solution of graphene-based sheets to the substrate, and drying the liquid solution to produce a continuous graphene-based layer adhered to the surface of the substrate, where the continuous graphene-based layer is substantially impermeable to transmission of small molecules through the graphene-based layer; (3) a method of sealing openings on a substrate involving contacting a liquid solution of graphene-based sheets to the substrate where the graphene-based sheets collect at least over an opening on the substrate, and drying the liquid solution to produce a continuous graphene-based layer substantially sealing the opening to transmission of small molecules; (4) a method of containing small molecules on one side of a barrier article involving placing the barrier article between the small molecules and an environment where the barrier article inhibits movement of the small molecules into the environment, and where the barrier article includes a substrate and a continuous graphene-based layer adhered to the surface of the substrate, where the continuous graphene-based layer is substantially impermeable to transmission of the small molecules through the graphene-based layer; (5) a barrier layer comprising graphene oxide planar sheets aligned substantially parallel to one another and having substantially contiguous overlapping planar sheet faces; and (6) a method of containing environmental toxicants on one side of a barrier article involving placing the barrier article over an environmentally hazardous condition where the barrier article inhibits movement of environmental toxicants in the environmentally hazardous condition into the environment, and where the barrier article includes a substrate including a landfill liner, a landfill cap, a vertical subsurface containment barrier, a subsurface permeable reactive barrier, a vapor intrusion barrier, a tarp barrier or resource conservation and recovery act (RCRA) cap and a continuous graphene-based layer adhered to the surface of the substrate, where the continuous graphene-based layer is substantially impermeable to transmission of the environmental toxicants through the graphene-based layer.