;The graphene oxide nanoparticles obtained from anodic graphite by electrochemical exfoliation, followed by electrophoretic deposition onto stainless steel or nickel substract. Another way to deposit graphene particles on non-conductive substract is used to produce graphene film, which named Evaporative Deposition(ED). By ED, graphene films can be deposit on polymer substracts like PEN and formed a flexible graphene film. The graphite film formed was reduced in two ways, vacuum treatment with heating up to 100℃ and ethanol treatment with heating up to 220℃. The wetting properties are determined by contact angle measurement. The advancing and receding contact angles of graphene oxide film are 38.4° and 15.5o, respectively. This result reveals the thin film is rather hydrophilic. After the reduction treatment, the advancing and receding contact angle increased to 83.1° and 50.5°, respectively, indicating that the surface of graphene oxide film becomes more hydrophobic. By the analysis of TGA, Raman, XRD and XPS, the results proved that both of the reduction treatment had attained a reduction effect. After the reduction, a graphene film was obtained and the resistivity of the film is 9×10^(-4) Ω∙cm.
