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O: Fachverband Oberflächenphysik

O 55: Poster Session - Nanostructured Surfaces and Thin Films

O 55.4: Poster

Dienstag, 17. März 2020, 18:15–20:00, P2/2OG

Rapid Water Permeation through Carbon Nanomembranes: Variation of Precursor Molecules and Substrates — •Dario Stierl, Hoang Linh Le, Michael Westphal, Niklas Biere, Yang Yang, André Beyer, Dario Anselmetti, and Armin Gölzhäuser — Faculty of Physics, Bielefeld University, 33615 Bielefeld, Germany

Carbon nanomembranes (CNMs) of ∼1 nm thickness are produced by electron-induced crosslinking of self-assembled monolayers (SAMs). Recently, a remarkably high water permeance in combination with a high selectivity has been achieved by 1.2 nm thick free-standing CNMs which originate from p-terphenylthiol (TPT) SAMs on gold substrates [1]. All tested organic solvents were blocked by this type of CNM down to the detection limit, which results in selectivity values of above 100. This contribution reports on water permeation measurements which investigate the effect of preparing CNMs on different substrates as well as varying the CNM precursor molecules. In particular, CNMs from TPT-SAMs on silver as well as p-quaterphenylthiol (QPT) monolayers on gold were studied by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), helium ion microscopy (HIM) and liquid permeation measurements with the mass-loss method.

[1] Y. Yang et al., ACS Nano 2018, 12, 4695.