Berlin 2015 – scientific programme
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O: Fachverband Oberflächenphysik
O 33: Graphene
O 33.3: Poster
Tuesday, March 17, 2015, 18:15–21:00, Poster A
Towards the growth of double-layer graphene by conversion of molecular monolayers — •Christof Neumann1, Gerardo Algara-Siller2, Daniel Emmrich1, Marta Trelka1, Ute Kaiser2, and Andrey Turchanin1 — 1Faculty of Physics, University of Bielefeld, 33615 Bielefeld — 2Electron Microscopy Group of Materials Science, University of Ulm, 89081 Ulm
Graphene double-layers are desired for implementation of novel electronic and optoelectronic devices as well as for applications in nanofiltration and energy storage. Despite the recent great success in production of single-layer graphene sheets, viable routes to produce graphene double-layers have not been yet established. Here, we present a molecular approach towards graphene double-layers based on the temperature-induced conversion of cross-linked self-assembled monolayers of 1,1',4',1''-terphenyl-4-thiol (TPT) on Cu(111) and polycrystalline copper foils. We characterize this transformation by complementary experimental techniques including X-ray photoelectron and Raman spectroscopy, low energy electron diffraction, helium ion and scanning tunneling microscopy. To determine the structure of suspended graphene nanomembranes we employ high resolution transmission electron microscopy and selected area electron diffraction.