Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: 2D Materials III: Nanomembranes, hBN, and Particle Interactions
O 59.2: Vortrag
Mittwoch, 3. April 2019, 15:15–15:30, H16
Preparation of Carbon Nanomembranes from SAMs with carboxylic binding groups on silver substrates — •Christof Neumann1, Monika Szwed2, Martha Frey1, Zian Tang1, Piotr Cyganik2, and Andrey Turchanin1 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany — 2Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Krakow, Poland
The electron irradiation induced synthesis of Carbon Nanomembranes (CNMs) from aromatic thiol-based self-assembled monolayers (SAM) is a well-established method to form molecular thin nanosheets [1]. These molecular 2D materials can be prepared with tunable properties and therefore they find a variety of applications in nanotechnology ranging from ultrafiltration to nanobiosensors [2]. Here we study the conversion of SAMs with aromatic-aliphatic backbones and carboxylic head groups [3,4] into CNMs on silver substrates. To this end, we employ high-resolution X-ray photoelectron spectroscopy, low-energy electron diffraction, atomic force microscopy and scanning electron microscopy. We find a clear correlation between the length of the aliphatic chain in the precursor molecules and the properties of the formed CNMs. Moreover, we compare these results with the formation of CNMs from thiol-based molecular counter partners. [1] P. Angelova, A. Turchanin et al., ACS Nano 7, 6489-6497 (2013) [2] A. Turchanin, A. Gölzhäuser, Adv. Mater. 28, 6075-6103 (2016) [3] A. Krzykawska, P. Cyganik et al., Chem. Comm. 53,5748-5751 (2017) [4] A. Krzykawska, P. Cyganik et al., J. Phys. Chem. C 122, 919-928 (2018)