Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.110: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Structural and mechanical properties of graphene and polycrystalline carbon membranes — •Maximilian Ammon, Yuri Koval, Michael Enzelberger-Heim, Christian Steiner, and Sabine Maier — Department of Physics, University of Erlangen-Nürnberg, Germany

Thin carbon membranes show interesting physical properties and are therefore promising materials for a variety of applications on the nano-scale ranging from chemical sensors to resonators. Here we discuss the structural and mechanical properties of two types of carbon membranes based on atomic force microscopy experiments in ambient condition. In one hand, we investigated the structure of electrochemically etched graphene membranes with an average graphene thickness of around 2-3 monolayers and a diameter of up to 30 µm. The morphology of these membranes shows a strong buckling with apparent heights of several tens of nanometers, which can be quantifiably connected to the pre-stress of the graphene after the growth on SiC at high temperatures. [1] On the other hand we studied polycrystalline carbon membranes with thicknesses down to about 3 nm obtained by the graphitization of polymers after low-energy ion irradiation. We determined the stiffness and Young’s-Modulus of such polycrystalline membranes by force distance spectroscopy.
[1] D. Waldmann et al. ACS Nano, 7, 5, 4441-4448 (2013).