The first step in making the PEDOT/graphene films was to create a film of overlapping graphene sheets. To optimize the conductivity of the graphene film, we employed a significantly larger graphite flake size, 300 µm, than conventionally used in the SITM approach. However, the exfoliation of large flake graphite is difficult because of the slow exfoliation kinetics. We overcame this by using vortex mixing, which increased the mixing, and thus the interfacial area, of the oil/water mixture. Since the exfoliation of graphite is driven by decreasing the interfacial energy between oil and water, increasing the area of the interface increased the total number of exfoliation events in the system, increasing the overall rate of exfoliation, even if the exfoliation rate of each event remained relatively slow. This method not only facilitates the production of large graphene sheets but also avoids the need for tip sonication, thereby preserving the large lateral sheet size of the graphene.