Using a 3D-printer and ink made of graphene nanoribbons, super tiny strips of carbon atoms arranged in a lattice, they made a mini grid on the mushrooms where current could flow.

使用 3D 打印机和由石墨烯纳米带制成的墨水，石墨烯纳米带是排列在晶格中的超微小的碳原子条，他们在蘑菇上制作了一个可以流动电流的迷你网格。