Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Poster Wednesday: 2D Materials
O 66.3: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
Mechanical characterization of carbon nanomembranes and graphene via AFM nanoindentation and bulge testing — •Florian Paneff1, Xianghui Zhang1, Nikolaus Meyerbröker2, and Armin Gölzhäuser1 — 1Faculty of Physics, Bielefeld University, 33615 Bielefeld, Germany — 2CNM Technologies GmbH, 33609 Bielefeld, Germany
With the development of freestanding two-dimensional materials and nanomembranes, the precise characterization of the mechanical properties of these sheets has become an important challenge. It is thus beneficial to combine several methods to obtain more accurate results. Here we employed both bulge testing and nanoindentation performed in an atomic force microscope (AFM) to determine the elastic properties of these nanomembranes. In the former case a uniform pressure was applied to a membrane and the resultant deflection was recorded by the AFM, whereas in the latter case the AFM tip was positioned to the center of the same membrane and force-displacement curves were measured. Both pressure-deflection and force-displacement data were processed and compared with finite element method to determine the elastic properties of the membrane. In this contribution we will report the mechanical properties of carbon nanomembranes prepared from aromatic self-assembled monolayers via electron irradiation. Mechanical characterization of other nanomaterials, such as mono- and bi-layer CVD graphene, carbon nanosheets and pyrolized graphitic carbon, will also be discussed.