Fig. 2: Intercalation modulated plasticization of graphene oxide papers.

a XRD profiles of the direct-cast GOP and the plasticized GOP with ethanol intercalating. b Typical tensile curves of the plasticized GOP and the direct-cast GOP, showing a distinct transition from elastic to plastic deformation. c Schematic of the plastic sliding of GO sheets induced by the increased interlayer distance and typical plastic and brittle fractures. d, e The fracture of direct-cast GOPs (d) and plasticized GOPs (e), respectively. Scale bar in (d, e), 200 μm (left), 50 μm (middle), and 2 μm (right).