Large scale graphene oxide deposition

摘要: 3.2 MethodWe describe in this section the newly developed technique for the controlled deposition of single layer graphene on arbitrary substrates. The deposition method and post treatment of the sample are summarized in Figure 3-1. It has been known for a very long time that graphite can be exfoliated and turned soluble by chemical processing as described elsewhere10, 11, 12. Following Staudenmaier’s method, we produced our starting material by oxidizing powdered graphite in order to get exfoliated hydrophilic single layer flakes of graphene oxide (GO)(a detailed characterization of the produced GO is presented in the complementary information paragraph and in appendix). A water solution (5 ppm) of GO was used as a subphase for a Langmuir–Schaefer (LS) deposition. 13 The injection of long chain molecule octadecylamine (ODA)(Figure 3-1g, and experimental section) at the air-water interface …