Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: 2D materials beyond graphene: TMDCs, silicene and relatives II
O 58.10: Vortrag
Mittwoch, 14. März 2018, 12:45–13:00, MA 043
Low energy electron induced crosslinking of aromatic SAMs — •Christof Neumann1, Richard A. Wilhelm2,3, Maria Küllmer1, Andreas Winter1, and Andrey Turchanin1 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany — 2Institute of Applied Physics, TU Wien, 1040 Vienna, Austria — 3Institute of Ion Beam Physics and Materials Research, HZDR, 01328 Dresden, Germany
Aromatic self-assembled monolayers (SAMs) can be converted into carbon nanomembranes (CNMs) via low energy electron irradiation [1]. Due to their mechanical and thermal stability as well as tunable chemical functionalization, CNMs are a 2D material with a large potential for application. Nevertheless, the conversion process is not yet understood in detail on the molecular level. In order to study the crosslinking we subsequently irradiated 4'-nitro-4-biphenylthiol SAMs on gold/mica substrates with different electron energies (5-50 eV) in UHV. Here we present the results obtained under in-situ conditions using X-ray photoelectron spectroscopy (XPS), Low Energy Electron Diffraction (LEED) and Low Energy Electron Microscopy (LEEM). To show the successful conversion process the samples were transferred onto TEM grids and Si wafers with 300 nm of thermal oxide and analyzed using optical, scanning electron (SEM) and atomic force microscopy (AFM). [1] A. Turchanin and A. Gölzhäuser, Adv. Mater. 28, 5075 (2016)