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HL: Fachverband Halbleiterphysik
HL 48: Two-dimensional Materials IV (joint session HL/CPP)
HL 48.12: Talk
Friday, April 5, 2019, 12:30–12:45, H36
One-Nanometer-Thin Carbon Nanomembranes: Combining High Water Permeance with High Selectivity — •Yang Yang, Petr Dementyev, Niklas Biere, Daniel Emmrich, Patrick Stohmann, Riko Korzetz, Xianghui Zhang, André Beyer, Sascha Koch, Dario Anselmetti, and Armin Gölzhäuser — Faculty of Physics, Bielefeld University, 33615 Bielefeld, Germany
Membrane-based separation provides an energy-efficient technology in producing clean water. Recent nanotechnology breakthroughs have led to the emergence of 2D membranes which promise minimal transport resistance and thus exceedingly high molecular flow rates. Carbon nanomembranes (CNMs) are a special class of 2D materials made by crosslinking of self-assembled monolayers. In this work, we will present the rapid and selective water permeation through a 1.2-nm thin CNM fabricated from terphenylthiol (TPT) precursors [1]. TPT CNMs consist of sub-nanometer channels with a high areal density of 1018 m−2. The membrane can block the passage of most gases and liquids, while permitting water and helium to pass through. In particular, water transits with a remarkably high permeance of 1.1 × 10−4 mol m−2 s−1 Pa−1, 2,500 times faster than helium. The rapid water flow is ascribed to a hydrogen-bonded cooperative transport inside the CNM channels.
Reference
[1] Y. Yang, et al. Rapid Water Permeation Through Carbon Nanomembranes with Sub-Nanometer Channels. ACS Nano 2018, 12, 4695-4701.