SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 39: Poster Session III: Poster to Mini-Symposium: Free-standing functional molecular 2D materials I
O 39.5: Poster
Dienstag, 2. März 2021, 10:30–12:30, P
Preparation of Carbon Nanomembranes without Chemically Active Groups — Christof Neumann1, Monika Szwed2, •Martha Frey1, Zian Tang1, Krzysztof Kozieł3, Piotr Cyganik2, and Andrey Turchanin1 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena — 2Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Krakow — 3Faculty of Chemistry, Jagiellonian University, 30-387 Krakow
The electron-irradiation-induced synthesis of carbon nanomembranes (CNMs) from aromatic thiol-based self-assembled monolayers (SAMs) on gold substrate is a well-established method to form molecular thin nanosheets. These molecular two-dimensional materials can be prepared with tunable properties; therefore, they find a variety of applications in nanotechnology ranging from ultrafiltration to nanobiosensors. However, having advantages for some applications, chemically inert CNM cannot be prepared from thiol-based SAMs, as the reactive thiol group is present on the membrane surface even after transferring it to other substrates. Here, we study the electron irradiation of carboxylic acid-based SAMs on a silver substrate as an alternative route for CNM formation. Our analysis, based on a combination of X-ray photoelectron spectroscopy and scanning electron microscopy demonstrates that for this type of SAMs, purely carbonaceous CNMs with tunable porosity can be obtained. Neumann et al. ACS Appl. Mater. Interfaces 11 (2019) 31176.