Regensburg 2022 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 10: Poster Session 1
MM 10.11: Poster
Monday, September 5, 2022, 18:00–20:00, P2
Reducing the Reduction Temperature of Graphene Oxide with a Copper Metal Catalyst — •Leonhard Niemann1,2, Martin Köhne1, André Hermannsdorfer1, and Christoph Tegenkamp2 — 1Department of Advanced Technologies and Micro Systems, Robert Bosch GmbH, Robert-Bosch-Campus 1, 71272 Renningen, Germany — 2Faculty of Physics, TU Chemnitz, 09107 Chemnitz, Germany
Since its discovery, graphene has been a material of great research interest due to its promising properties of high electron mobility and electrical conductivity. However, the proposed applications have not yet been realized due to the complexity of fabricating high-quality, defect-free, large-area graphene films. Graphite, which consists of stacked graphene layers, does not have the same promising properties but is easier to fabricate. By intercalating Lewis acids between the graphene layers of graphite, the layers decouple and graphene like behaviour is achieved. The conductivity of these graphite intercalated compounds (GIC) is increased. Here, we report a gas-phase intercalation method for graphite films with AlCl3, resulting in GICs with 20 MS/m. These films exhibit good long-term thermal stability. It is noted that the final conductivity depends on the electrical conductivity of the untreated graphite films which is affected by defects in single graphene flakes and the flake size. Studies to increase the conductivity of non-intercalated graphite films are necessary to increase the conductivity of GICs. Therefore, further studies on graphenization of graphite films and defect healing are conducted and the results are presented.