‘Impermeable’ graphene yields to protons
Success in penetrating thin carbon sheets offers promise for better fuel cells
![graphene sheet](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/11/ag_graphenesheet_free.png?fit=860%2C460&ssl=1)
CARBON BARRICADE A graphene sheet is made up of just one atomic layer, as illustrated here, but its structure prevents other atoms and molecules from penetrating.
E. Otwell