Reformation of graphene flakes with RF-thermal plasma

Summary form only given.Plasma reformation of commercial graphene nano flakes were performed by RF thermal plasma torch for transparent conductive electrode applications. We prepared thin films from three different powder samples (raw materials, one-cycle and two-cycle plasma treatment) by a process including dispersion in iso-propyl alcohol (IPA), spray coating on a transparent PET substrate, and rolling followed by drying. For characterization of transparent conductive films, transmittance and sheet resistance of flims were measured. By increase in the number of plasma treatment, transmittance in the visible range increases from 50 % to 70 % and sheet resistance decreases from 2,200 Ω/□ to 200 Ω/□. Despite the high temperature (more than ~10,000 K) during plasma treatment, the damage of graphene nano flakes were not found.