Figure 4
From: A Universal Stamping Method of Graphene Transfer for Conducting Flexible and Transparent Polymers
Repeated graphene growth on reused copper: (a) Left, photograph of Cu after the first time graphene growth and graphene/EVA thin film transfer by stamping method. Right, graphene grown on Cu foil after first time graphene/EVA transfer. (b) OM and (c) SEM image of graphene transferred onto SiO2 by PMMA transfer method; arrow represents the contrast of SiO2/Si where it distinguishes the contrast of graphene. (d) Raman spectra of graphene transferred onto Si/SiO2 where black line and red line corresponds to the first time graphene grown on Cu and second time graphene grown on reused Cu, respectively.
