Transmission Electron Microscopy Study of Graphene Solutions

In this paper we will present the result of the characterization by TEM of the graphene membranes produced by exfoliation of KC8 in N-methylpyrrolidone. This chemical route is capable of processing large quantities of material, with a yield of 35% of the starting graphite, producing large, micrometric size, membranes composed of only few graphenes. The deposits from the solution are characterized using low-voltage transmission electron microscopy, revealing the crumpled folded structure of the graphene membranes and their stacking structure